http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/devil.gif *We have some real nice snow in Michigan....Finally.....Too bad its March...But I went riding with two guys with 2002 Yamaha Vipers...both stock one has 144 studs....Well early in the ride we had to get the curiosity eliminated so we lined them up. My 97 670 MXZ smoked them. I got the hole shot and they never caught me. I let off when the speedo hit 90 mph and I had a 5-6 sled lenght on the one with studs. http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/sly.gif *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/thumbs-up.gif *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/nervous.gif *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/wow.gif *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/tounge.gif *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/wink.gif *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/baaa.gif *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/cheesy.gif

That doesn't surprise me, but the vipers will have longer legs.

Yes! http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/thumbs-up.gif THE YELLOW ROCKET STRIKES AGAIN! http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif *I love it when they do that! http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif

WHY WOULD THE VIPER HAVE "LONGER LEGS"? BECAUSE IT'S A TRIPLE? PLEASE EXPLAIN.

Longer legs just mean it will have a higher top end.

Triples like the Mach Z will not blast out of the hole like a twin 800 but will catch up to it very quick (very quick.) and then just pull away. *This is partly to do with the weight and the 3 pipes that the Mach Has and maybe becasue it wasnt clutched and geared by skidoo to have that kind of lanch. *But the main reason is that the stroke on the triple is much shorter then a twin. *This causes less torque then a twin but much more hp and higher revs. *

The viper how ever is also a triple but it has a single pipe. *That alone creates more torque but robs it of top end and hp. *

The viper might have eventually gone faster then the 670 but it would probably take a while to catch up. *So in any kind of drag race the 670 would probably win.

OK,LET'S SAY FOR EXAMPLE I HAVE A GOOD RUNNING TWIN PIPE 670. IT MAKES 140 H.P. AT 8500 R.P.M. LET'S SAY THE OTHER SLED IS A TRIPLE 700 TRIPLE PIPE. THEY BOTH MAKE 140 H.P. AT 8500 R.P.M. THE TRIPLE WOULD STILL WIN ON A LONG RUN? WOULDN'T IT COME DOWN TO POWER TO WEIGHT, CHASSIS FREE ROLL, AERODYNAMICS, ETC.?

Triples generally rev higher, higher reving equals higher top end.

i have a mach 1 700 clutched dynos and geared i take twins out of the hole! i have lost top end but thats ok500 to 1000 feet is all i like to do! plus in the trails its like a rocket!!

I would agree that the Viper would take me top end but they had to do a lot of catching up to do that. I rode my buddies Viper that wasn't studded and it isn't as torquey as my sled. I could tell just by riding it that I would beat it for a while. It handled fairly well. It feels small but light. I dont think it took the bumps like my 670 does but all in all its not that bad of a sled

I thought the 670's always win http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/smile.gif *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/smile.gif

You guys are getting way too carried away. A friend of mine has a 99 H.O. (which is a much faster sled than your 97 670) and I out ran him on my SRX which was recently beat in the low end and mid range by a Viper. Granted I caught him on the top end but he had me till then. One thing that you ski-doo guys don't understand is how vital set-up is. When I first bought my SRX I couldn't beat anything, including 600s and I own a 700. It was when I got beat by a Yamaha 600, that was when I knew something was up. So I started tinkering with my rear suspension in the quest for more hook up. That was when I found out why so many Yamahas aren't set up right...they are a pain in the &^%$ to adjust. After an entire season of tinkering I finally got what I was looking for, since then I have not been beat by another 700 and have even in some cases beat 800s. Its all about set up.
* * As far as the numbers you are talking...I have an issue of Sno-Tech that has the 2000 MXZ 700 at 121 horses. This is not only the number they got but it also states that this is within the average numbers that these machines produce. It then goes on to say that the 2000 MXZ is only slightly FASTER than the H.O. There is no way a 97 670 is at 140.

SRX..a twin piped 670 can easily make 140HP...

FIRST OFF I WILL SAY THIS. IF I WAS ON THE MARKET FOR A THREE HOLER,I WOULD BUY A 700 SRX. NO QUESTION. BUT, I HAVE BEATEN SO MANY SRX'S WITH MY TWIN PIPED 670 I HAVE NO REASON TO BUY A THREE HOLER. IT'S ALL IN THE SET-UP. IF YOU SPEND THE TIME TESTING YOU WILL REAP THE BENEFITS. A 670 CAN'T MAKE 140 H.P.? I'VE SEEN DYNO NUMBERS AS GOOD AS 158 H.P. GET YOUR HEAD OUT OF THE SAND.

The 670 H.O. makes around 129 hp stock so with twins it could make 14 horse. So take that. http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/withstupid.gif

Hey guys, *Sounds like there is only one way to resolve this!

This Saturday, March 9th, *Mancelona potato fields! *You pick the meeting spot and my HO (undefeated by any viper) will be there !!! * http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif

I thought that SRX's had good factory settings?? all I know that at the end of the field they are chokin on my ZR800 snow dust...been there done that......go 670 http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/smile.gif

Rich Daily from Dynoport has a set up that can get 142 hp out of the 97 670 without twin pipes. I knoiw that there are fast Yamaha's out there...I will not deny that.....But I've never ran accross one yet. Two years ago at a "Poker Run" in Michigan. There were about 17 of us in the group. Three brand new 2000 SRX's....One was the SXR. Two were studded one was clutched, Studded, and Piped...Neither even touch the 670. I got the hole shot every time and kept going. My buddy who us eto ride a 95 650 piped Polaris rode my 670 against the Yamaha's (the only ones in the group that culd even try to run with my 670) and my buddy weighs about 50-60 pounds more than I do and he still beat the Yamaha's. My sled is only clutched, studded, and a Dynoport can.

What kind of clutch setup you got? *I've been playing for 2 years and can't find a good one.

99srx700- *The reason us skidoo guys dont understand set up is that skidoo is pretty close to perfect from factory. *Sure you may need to tighten the suspention and click a shock hear or there but its pretty close. *

All i can say about the viper is that in december when the viper hype was still very high i met a guy on the trails with one. *It had 900kms on it and mine had 1000. *We were talking about trail conditions and then i asked him about his machine and how i though it looked good. *So he starts telling me that a little up the trail theres this huge airport runway and he just blew the doors of a mxz 800 and a SRX. *I told him i was headed in that direction so we went. *

We get there and theres a guy with a 98 670 mxz. *And they raced. *The 670 won the race buy about 4 sled lengths it wasnt close. *

Ive beeten SRXs with my mach when it was stock by 5 sled lengths and a race between a mach a 670 is close. *

Then two weekends ago i raced a piped and clutched SRX 700 on a lake. *Who could get to the other side first. * We were going and the srx just would not move past 180km. *

Im not trying to insult you but i have yet to see this Viper and SRX perform like all the Magazines and Yamaha says it will. *

I tend to agree with the comment above. ("Im sure there are fast yamahas out there, I just havent seen any.")

I had a 97 MXZ670 clutched and otherwise just well maintained. *I only raced 1 SRX and it had aftermarket pipes, V-force reeds, and I am not sure what else. *My 670 beat the guy so bad he would not race again. *The guy I sold the sled to raced two Yammies this winter 1 SRX and 1 Viper. Smoked them both. *I have seen fast SRXs but have not run one. *I now have a 670HO. *It actually runs about equal to the 97. *The non-HO 670s are very strong running sleds all they need is clutching. *If you under estimate them you will get a big suprise.

A lot depends on the sixe of the rider too. *My MXZ X 600 will beat my brother's 700 in a race, if he is driving. *He weighs 100 pounds more than me too. *I would love to race a Viper, if I ever see one driving around. *This next weekend should be a good one. *We are going with a bunch of guys to the Cable area. *We'll see who is king of the hill. *I think my dad's Mach 1 will whoop all of us. * *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/cheesy.gif

i have a mxz 2001 mxz 800 and i'v had 99 machz and if the twin is set up good it will out run the triple every time i race alot of *triples they try to run me about a half miles to see if they can pass me and they can't do it i get them out of the hole and they never can pass me i here alot of people saying that there 800 twin don't run no top end but if they are set up right they run good *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/tounge.gif

.....You dont have a true 670 if you are pulling 165 horse. Rich Daily from Dynoport has put the 670 through the test throughout the years and without a big bore kit and new pistons about the best you can do is 142 hp on the 670. Check out the 97 sno-tech magazine article. It say it all. I have a roller clutch in my 670 and it performs very well going on 3 year with that clutch set up http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/devil.gif *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/sly.gif

oh you guys are talking about modified sleds...well thats a whole new story in that case yes a 670 is good for 140 but nothing beats a sled that goes out of the box. Just for the record I do outrun 800s on my SRX but not always. As for the ZR 800...squeaked by one once but haven't raced any since...doubt I will be so lucky again. I also only weigh 140 so that might have something to do with it.

Is this 670 at Turkey an H.O? Is it owned by a guy named chris?

Sounds like alot of fun http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/smile.gif

The stock 670 puts out @119 h.p. and the H.O. puts out @ 127. Something to keep in mind, it doesn't matter the H.P. numbers if you're not getting it to the ground. Good clutch set-up and proper tuning will get you far. My 95 670 has 5400+ miles and it is not stock, but the case has never been opened, jugs have never been removed (so its stock porting) and it has the stock pipe. It has the 136 skid so I only play with other 136's for racing. I have smoked polaris 800's and 700's, and Doo's 800's and 700's. Does my 670 make more H.P. than the 800 and 700. I doubt it, but I'm getting more to the ground through good set-up. Never, ever under estimate the 670 or 670HO you could look like a fool.

Hey Machzzzz1, *that 670 you talked about on the airport? *

That was me *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif * hehehehe

I'LL SAY THIS AGAIN. IT IS NOT HARD TO GET 140 H.P. OUT OF A 670. THE 670 IN THE SNOW TECH ARTICLE IS ONLY RUNNING 42MM CARBS. NOW, LETS TAKE OFF THE OIL INJECTION COVER AND RUN BIGGER CARBS. THE DYNO PORT PIPES ARE LOW R.P.M. PIPES. LETS PUT ON SOME HIGH R.P.M. PIPES WITH RACE PORTING. CAN YOU SAY CRANK SHOP? THEY CLAIM 158 H.P. AT 9000 R.P.M. I WOULD SAY THAT'S A PRETTY ACCURATE NUMBER. THAT'S STILL WITH 670 CC'S.

Just to let you guys know that I didn't reallize you were talking about modified machines. I was thinking of the stock 670 motor. When I went to check the replies of my original response I didn't reallize that there were three pages to this thread. Because of this I was unaware that you were talking about a 670 with twin pipes. In this case I will agree that with a few mods a 670 is more than capable of 140 horses. But in my opinion this is an unfair comparison to a stock sled. Especially to one like the Viper. The Viper seems to be a machine that runs very well when modified and tuned properly. You are talking about running a modified 670 against a stock Viper. Even if these Vipers you are beating aren't stock they probably aren't set up right. The Viper is a very capable machine and can be tuned to over 170 horses if you want to bring aftermarket pipes into the game so don't compare apples to oranges. If you want to brag about the ski-doo 670 motor brag about it in stock form. Talking about how your modified 670 is beating stock Vipers says nothing. When you start telling stories about how your modified 670s are beating modified (and well set up Vipers) then you will have a point but that fact of the matter is it won't happen. I believe it was sno-tech who stage tuned the Viper to 185 horses. So until you see that from your 670 I wouldn't consider it logical to say that this motor is superior to the Viper.

A friend of mine has a 99 H.O. that was formerly a race sled. It is not stock and runs very well. Before it was sold to him...by his friend who raced it...it dynoed in at 135. This is a 670 H.O. Also the magazines put these at around 120. The HO is a hopped up version of the 670 you guys are talking about. These are people who know what they are doing. The sled was raced by Bill Bickford (or one of the guys on the team) and there numbers are up to par. One of the girls I ride with has a 99 Formula Z 670. Now I may be wrong but I think this is the same motor you are referring to. My SRX is a solid 140 horse and absolutely smokes this girls machine. As for the HO I walk away from him through the mid range and top end. I am sure there is a valid reason you are convinced of this but remember that you can't believe everything you here. Trust me there is no way a 670 is 140. Take it from someone with a solid 140 horse machine that has smoked these machines time and time again.

I HAVE A STOCK 99 670 TONY HIKONEN H.O. I HAVE NEVER LOST A RACE TO A STOCK VIPER. APPLES TO APPLES.

If you guy's are ever around NewHampshire on the weekends check out Turkey Pond on the weekends we run a 670 that beats just about everything up there.This motor has over 165HP and turns at 9600 rpm. We will be testing again this weekend if the ice is still safe.

The 670 I'm talking about is a 95 mach 1 and owned by George *Fogg.

Show me a 170 HP Viper for less than $10,000. You have to dump a ton of cash to get that kind of HP from a 700. My 98 670 in stock form was tough to beat. Like the other guys say, you just have to get it to the ground.

I agree with you all. It is all about getting it to the ground, which applies to clutching and suspension set-up. The SRX is clutched well out of the box but as I was saying earlier its the suspension that usually needs the attention. I was losing to 600s and all it took was a lot of tinkering with the rear end. Once I got the traction and power to the ground that was it. You guys definately know your stuff so I don't doubt what you claim, but, I have yet to see a 670 run good against me. My friends H.O. was very close but he will tell you that he has never seen another 670 run even close to him. My point is I think that you just haven't come across any Vipers or SRX's that are trully set up for their full potential just as I have never run against a 670 that has been trully set up for its full potential.
* * As for Turkey Pond...be careful the ice goes out real quick there. I bet its almost open right now. I haven't been in a while...I usually only go once or twice every season...has anyone checked it out lately? If there is still ice, is there anyone running out there?

idooski, snow-tech tuned the Viper to 180 HP in only "$2195.00"(Snow-Tech, December 2001)

670 full mod for grass- 168 hp @ 9200.
740 full mod- 182 hp @ 9000.
Now I realize this is far from stock(17:1,race fuel, 48's, 6 second pipes) but it shows the potential in these motors. You can easily make reliable hp way beyond the capabilities of pump fuel.

Getting back to the stock 670 VS stock Viper topic! *My brothers 99 Formula Z670 and his friends 97MXZ670 both beat a Viper. *The track was in a field on snow(not ice) and it was about 1500 to 1700 ft long. *Both 670s are stock but well maintained and set up. *The guy with the Viper put it up for sale immediately. *The 97 MXZ was mine until I sold it to my brothers friend. *I raced an SRX with it on a lake and beat the SRX good. *The SRX had V-Force reeds and aftermarket pipes. The guy that has the MXZ now also beat an SRX this year. *There are a lot of 670s out there and many of them are not maintained at all. *The 670s that get beat up on are either not maintained or not running to their full potential. *Never underestimate the 670. *Ski-Doo should have taken the 670HO, bored it out to 700, Nicasiled the cylinders and used that for the MXZ 700 instead of the Series III. *Nothing would touch it.

670 HOTH, I COULDN'T AGREE MORE. THE ROTARY VALVE COULD HAVE BEEN EVEN BETTER. IT COSTS MORE TO MAKE THE RV MOTOR THOUGH.

I like all the posts. This was a very good topic. My 97 670 is stock and I think that I have got the most potential out of my sled. I have to agree...It's about getting the H.P. and torque to the track. My 670 is clutched and I put the Dyno can on it. As stated in my earlier post, I race a 99 SRX piped, Studded, and clutched and he never touched me. I'm running mineral ski-doo oil and 93 pump gas. I really like the replies this is very interesting. I was going to buy a new sled this year but I havent put too many miles on this year. I put a new track on last year because of several studs torn out of the side of the track. I studded it down the center this year. Since I'm not buying a new sled, I bought the wife a new Chevy Avalanche...What a sweet ride http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/thumbs-up.gif

Sweet ride? The Avalanche or the wife? * http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/devil.gif

I testdrove both of them,both very nice *LOL http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/devil.gif

jeadymack....send me a PM with your setup (or parts of it http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/wink.gif ) if you don't mind...I'd like to see what you've done. thanks. http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif

Before you were talking about piped and modified sleds now you are talking stock. I don't care what those SRX's you beat had done to them...they weren't getting the power to the ground. I have raced many stock 670's and 670 H.O.'s. None of them have ever touched me anywhere down the track. NOT EVEN CLOSE!!! I find it very hard to believe that a well set-up SRX is being beat by a stock 670. Modified sure but thats a new ball game. Especially since I have raced many newer SRX's that have blown me away (the newer motors have a lot more power). Like I said before suspension is the key and if your modified you have to be clutched right and you would be surprised how many people aren't cluched right. As I said before I ran against an H.O. that wasn't stock and of all things it was a race sled and I still got by him...not by much but I did. What is it with you 670 guys? Everytime I race one of you I get blatent remarks about how my machine is slow and they have beaten so many before. But I have never lost to one!

A well set up SRX scares the #### out of me! A buddy has a slightly modified 98. 118 on the gun. They can rock. http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/sad.gif

I find it really hard to believe that a stock non H.O. 670 could beat an srx unless is was a really poorly setup 600. But the viper is a different story.

I never said anything a piped sled if you read my posts. I mentioned about the "Stage Tuning" in the Sno-Tech article...But I never said I did it too my sled. My sled is clutched with a Roller 50 Deg helix, DynoPort silencer, 501 rv, short intake boots, and 24 tooth small gear. *I said my 670 beat two vipers. The other SRX's I have raced a couple years ago were piped and clutched and they still lost. All I said was that there has yet to be a SRX that has even come close to beat me. As I stated before, I'm not doubting that there are fast Yamaha's (stock except for clutching) out there. But I have yet to run accross one. I know what your thinking.....Name a time and a spot and we will race...Ok......But if I get beat by one yamaha that has the right set-up to get the power to the ground....Well that would be one out 17 yamaha's that I would lose to. Not very good odds for Yamaha.....My total point on that posting was to get some feedback on the "Viper Hype"...If I bought a new 2002 Yamaha viper and I was beat by a 97 670 I dont think I would be too happy. The two guys I rode with that had the Vipers know I didnt do anything to my sled (except for the aboue listed). Those Yamaha's were broke in. One studded one not and they got smoked. They were very disappointed in the Viper. They both rode my sled and they both agreed that just after riding my sled that they know why they got beat. They agreed that my sled rode better, torquier, and faster than their Yamaha's just by riding my sled after our two drag races. They are good sleds because I rode both of their sleds. But I will take my 97 670 over any Yamaha (except for maybe the RX-1) anyday.

Jaedymack,
* * You said something about having a 24 tooth small gear. Is this the stock setting or is this a change that you have made? If it is not stock setting then it is clear you have "geared" your sled which makes an unbelievable difference. Two of the guys I ride with are pro grass draggers and spend lots of time tuning and dialing in. They claim the best way to improve your sled's performance is to gear it. They recommend this (as a first step) over anything including pipes. The problem is that you lose top speed but what you gain in the low end is very surprising. If you are geared then you probably have a very fast machine but in my opinion it is not fair to compare a sled that has been geared to one that has not. Even if your competetors are geared it is very possible they are not clutched as well as you are, which implies only that there set-up is off and says nothing about the potential of their machines. I ran against a guy about a month ago with the same sled as me only he dropped 2 teeth in the gears and clutched accordingly and holy !@%$ was his machine quick. So quick that even though I had more top end it would take me a mile just to catch him after being blown away so bad through the low-end and mid-range. There is no doubt in my mind you are outrunning SRX's if you are geared.

ok SRX....enough is enough. It's all about setup -- we believe you. *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/thumbs-up.gif

The 670s that I talked about beating Vipers and SRXs have stock gears. *97 MXZ670 - 26/44, 99 FZ670-25/43, 99 670HO-26/43. *My personal experience is that gearing down a 670 is detrimental unless you are running <1000ft. *If anything they are one of the few sleds that work better geared up from the stock gearing. I will admit though, it could be that I never got my clutching optimized for the 24 tooth top gear.

Well I&#39;ve been reading this post long enough! Time for me to add my 2 cents....

I race my HO againt two vipers that were geared and clutched. *Beat them both on snow covered airport. *They reclutched, and came back for more (I didn&#39;t touch a thing on mine), *still smoked them both! *I would agree that if i had purchased a viper after reading all the hype on it, *I too would be dissapointed!

SRX on the other hand is another story. *I have beating a few, and got smoked by a few others! *My friends dad has one that is stock,clutched and geared, and i think he almost lapped me on a 1000 ft drag race!! * http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/wow.gif

It just goes to show that testing and tuning pays off, *Mess with it long enough and your edventually find something that works... The SRX rider mentioned above is retired and lives on an awsome snow-covered airport! * Makes me jealous!

Sorry, I mis-spoke..I dropped one tooth on the small sprocket. So yes, I am geared and clutched. The way I look at it is that I have gotten the most potential out of my stock sled without tunnel port, big bore kit, and pipes. Its all about the set up. The speedo hits 112mph the GPS says 109mph...That isnt too bad for gearing.

Sorry guys...I just thought this was a really good topic *http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/smile.gif

I think you all have valid points. but im going with susp .my stock viper can go 102 on my trail susp. setup or 108 it i just tinker with the limit straps and front susp. i have beat poorly set up 700&#39;s and lost to 600&#39;s that were better set up than me.my bud talked to some yammie guys that were at the show in portland, ME last friday and they said a clutched viper they had was doing 108?? he laughed and told em my sled will get that stock. so i think the susp. has the most to do with hookin up that track! by the way..has anybody put triple pipes on their viper yet? I heard good and bad but its all 3rd hand info? so any input would be great!

Hey imp....try that question in the Yammi forum...you won&#39;t get any replies here http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/exclamation.gif

my 99 670 ho has hit 200 kms on a couple of occassions now. that works out to be 125mph. I hit that last weekend. I admit that i don&#39;t have the torgue starting off that an srx has, but i don&#39;t think you ghet far enough ahead of me that i wouldn&#39;t get you top end. anyway my sled is all stock except for a MRBP can. My only complaint is that i keep fouling plugs.

I have a 97 670 wuth 5700 miles on it and a goodwins clutch kit and crankshop pipes. On packed snow in about 600 to 800 ft I raced a 97 mach z..98 mach 1..99 mach z and a 99 zr 600....I killed all of them off the line...the only one that past me was the 99 mach z......670all the way :p

my buddie has a 99 mxz 670 ho tony heikonen sled, and it is a fast sled. But there is no way it could beat a 700 srx. One of my friends has a 00 srx 700, and it rips. It beats other 700&#39;s with ease, and constantly runs with 800&#39;s. I love ski-doo, but there is no dought that those triple piped srx&#39;s are fast. I dont know if a viper could beat a 670. It would be close. The 670 would have to be set up right.

Originally posted by adamp670@Jan 16 2003, 11:39 AM
my 99 670 ho has hit 200 kms on a couple of occassions now. that works out to be 125mph. I hit that last weekend. I admit that i don&#39;t have the torgue starting off that an srx has, but i don&#39;t think you ghet far enough ahead of me that i wouldn&#39;t get you top end. anyway my sled is all stock except for a MRBP can. My only complaint is that i keep fouling plugs.
125 MPH 670??........LOL...Thats one hell of a can...... Good One!! :doh:

and my dad can beat up your dad :blahblah: .............quality of ride beats speed any day.