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10-27-2002, 04:36 PM
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#1
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Senior Member
Join Date: Oct 2002
Location: Chazy, NY
Where I sled: Lake Champlain and the Adirondack mountians of upstate NY
Posts: 677
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just picked up a 670HO and was wondering how fast they are also what if any mods are needed to make them really cook.
__________________
There is a thin line between fishing and a man standing on shore.
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10-27-2002, 05:32 PM
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#2
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Senior Member
Join Date: Nov 2001
Location: Regina
Primary Sled: 99 670 HO's
Where I sled: Regina Beach
Posts: 264
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they are very competitive with 7's and even some 8's. Depending on what you would like it to do , the best mod is an 1 1/4 track. Clutching , gearing, and good maintenance.
I have an MBRP wide kit on the front end of my flatland HO and love it.
Ufo's have their good points and bad. Love the throttle respone, hate the gas mileage. Going to give them a go again with some changes and see if I can get the mileage up.
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10-28-2002, 03:12 PM
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#3
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Senior Member
Join Date: Jan 2002
Location: 47.29.33.32N 92.51.53.38W; 1552ft
Primary Sled: '95
Where I sled: around here
Posts: 3,183
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go here to see what to do to really make that sled cook--
http://mxz670.tripod.com/99670HOTH.html
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10-28-2002, 03:33 PM
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#4
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Senior Member
Join Date: Oct 2002
Location: Mukwonago, WI
Primary Sled: 2005 Mach Z, 1.25 Ripsaw
Where I sled: Northern WI & da U.P.
Posts: 211
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Even though it spots some 30cc's to the larger 700s, it is a really quick sled. On the bottom and mid-range, it really moves, but the top end suffers a little.
On my old 670, I had a goodwin performance clutch kit, and one tooth smaller gear (the small gear). It was studded with 144 studs, I had the shorter intake boots and had tried a couple of different rotary valves. I always did very well in grass drags with the machine, and even could beat SRX's up to about 75-80mph. After that, the top end would drop off.
All in all, a great motor!!
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10-28-2002, 05:17 PM
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#5
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Senior Member
Join Date: Nov 2001
Location: S-E Lower, Michigan
Mileage: 1115 miles
Primary Sled: The old purple pile
Where I sled: Frederic to Lake Gogebic & everywhere in between
Posts: 2,422
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Fastest twin Skidoo has ever built! :hallo3:
__________________
Your wannabe information center----may I help you?
2000 Flll 800
SC3 x 136 with a 1.5 track.
MXZ racing shocks up front with precision skis.
Clutched & geared by Joey.
And now RER, ya baby!
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10-29-2002, 03:19 PM
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#6
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journeyman sled/motorhead
Join Date: Mar 2001
Location: Indiana/Irons michigan
Mileage: 282
Primary Sled: 06 renegade 800 HO
Where I sled: Irons michigan,or where there is snow
Posts: 4,440
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can't say I agree with that,I had both and my 700 is faster.the ho would win to around 60mph past that its all series 3.
__________________
"DREAM AS THOUGH YOU'LL LIVE FOREVER, LIVE AS THOUGH YOU'RE GOING TO DIE TOMMORROW" JAMES DEAN
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10-30-2002, 12:20 AM
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#7
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Senior Member
Join Date: Oct 2002
Location: Chazy, NY
Where I sled: Lake Champlain and the Adirondack mountians of upstate NY
Posts: 677
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thanks for the info guy's i'm thinking about getting the 740 big bore for it any info on that would be great.
__________________
There is a thin line between fishing and a man standing on shore.
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10-30-2002, 12:55 AM
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#8
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Senior Member
Join Date: Mar 2001
Location: Colorado Springs, CO
Primary Sled: None at the moment
Where I sled: Colorado
Posts: 918
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If you dont even know how fast it is why do you want to modify it before you even ride it? Just curious.
Ryan
__________________
It's not that winning is everything, it's just that losing sucks so bad.
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10-30-2002, 01:01 AM
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#9
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Senior Member
Join Date: Oct 2002
Location: Chazy, NY
Where I sled: Lake Champlain and the Adirondack mountians of upstate NY
Posts: 677
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RNM2399
because there is no replacement for dissplacement thats why.let's see 145hp 740 vs 127 stock,i need all the juice i can get.
__________________
There is a thin line between fishing and a man standing on shore.
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10-30-2002, 12:25 PM
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#10
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Senior Member
Join Date: Mar 2001
Location: Bradford, Ontario(lake Simcoe)
Primary Sled: 1997 MXZ 670
Where I sled: Lake simcoe & Muskoka
Posts: 1,106
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With a little bit of grinding in the right spots, a stock bore 670 will make 145hp with the stock pipe and muffler.
__________________
MXZer
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