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Discussion Starter #1
has anybody raced a new zr 900 yet. i have a 01 mxz 800 ported. rk tek head, heelclicker clutch, with a 25 top gear, and a 1 1/4 track with 96 down the middle.  i was wondering if i can give him a run. im running around 150hp +.
 

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speed,
 a friend of mine with a zr900 untouched motor was 126 mph at 1600 feet radar, if you can surpass that then i guess you have him hands down. now this guy was asked by a local cat guy to try the sled some because their people couldn't get it over 112 mph in the same distance.

 put in your location unless you are running from the law.
 

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You better make it a short race, because anything over 1000ft that 900 flies. I beat every 800 mxz I raced this season including a couple good running rk tech healclickered, and beat the 900 to 1000ft 3 for 3, but after 1000ft the 900 said goodbye in a big way.
 

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Paul,

Was the gentleman's name "Dave" That had the fast 900??  I wonder who set that sled up.
  Sounds like someone I know.

Speed,

Who did the porting??  If rick did the porting you have a chance if tuned by the right person, if it is not and the 900 has been clutched by a certain tunner you are in trouble.


GLHRACING
 

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glhracing,
 the guys name is gary evans he lives around the corner from me, the guy is a hardcore snowmobile dragracer. real good guy and as straight as an arrow.
 

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Discussion Starter #6
whats up damon. mine was ported by don emery at DNE in canada. i have followed your advice and so far my sled rocks. but as you know im looking for more speed. ill call you and let you know the details and where im at on the tunning.
 

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A GUY AT THE CABLE WI RADAR RUNS WITH A 2003 900 RAN 99 M.P.H. IN 1000'
 

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Thanks Paul,

I was curious because we also set someone up from Ontario and he did 126 as well.  Bone stock engine and only 168 trail studs.  They are pretty impressive and a joy to tune.

GLH
 

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the ZR900 has some good power. I went sledding with my friends who have the800's and I can pass them at will. The 900 flat out rocks
 

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the 900 cat may make power, but what about vibration and crank longevity (bearings) with such large pistons? Not the ideal design imo. And 126mph with tall suspension and stock motor? yea, right..............
 

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 126 IN 1600 FT.? YOU BETTER HAVE THAT RADAR GUN CHECKED OUT. I THINK IT'S READING HIGH.
 

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Its the same bottom end as the 02 800 and the pistions are the same size. The stroke is longer  that how they got the 60cc. The porting must be way different because it pulls hard out of the hole and the mid range is unbeliveble. We were in the restarant and this guy had a mach Z piped and set up and was spouting big words. We went out to the river and raced. The ZR is right out of the box and I made that mach Z eat snow dust in a big way( 2 sled lengths in 660 and 1 sled length in a 1000 feet and he couldnt catch me on top either)............The srx7 wouldnt even line up.  The moral of my story is dont snow check the ZR 800 because its a waste of money the 9 is to strong and worth the xtra money.
 

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I would have to agree with Rotaryvalvesrule I haven't seen too many sled do 126 in 2000 feet,check DD racing up in north bay ontario they radar run all the time and compare with some of there times

ROTAX POWER ALL THE WAY
 

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I never said anything about top speed.....But the fact is its a 115 mph in half mile and a flay out top speed run you will see 120mph...... fact.....  My ZR 800 is capable of atleast 110mph on gps......we geared it way DOWN and still hit 105 with STOCK clutching..
 

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i`ve seen alot of piped and clutched zr 800 cats at radar runs and in 1500 they had a hard time to break 110 mph and now the zr 900 bone stock is running 126 mph.give me a break!!! somebody is smoking some good stuff
 
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