Is it hooked up? If so slightly lower gearing. If not leave it stock.
Yes as far as I know. 24/50. There is a spec sheet thread in FAQ. Please add yours if you have it.
https://ty4stroke.com/attachments/scan0003-jpg.93587/
murdered141
Snow Punisher
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- Yamaha sr viper 15 ltx dx, mpi 190 turbo, straight line header, 38" mtx front end, mtx steering, mtx seat, xtx 141" skid and 2.25" power claw track
2019 sidewinder xtx le, sleeping for now
Rtx/ ltx with the 1.7 sno x track came with 21 49 gears, awesome out of the hole, but struggled past 80mph
That would be RTX LE. No LTX ever came with the lower gearing.
murdered141
Snow Punisher
- Joined
- Nov 24, 2015
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- 43
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- U.P Michigan
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- Snowmobile
- Yamaha sr viper 15 ltx dx, mpi 190 turbo, straight line header, 38" mtx front end, mtx steering, mtx seat, xtx 141" skid and 2.25" power claw track
2019 sidewinder xtx le, sleeping for now
I stand corrected, thanks Cannondale
rx1 fern
TY 4 Stroke Junkie
That’s what I want to put on mine , backcountry 1.75 track . So I’ll gear it down 21/49 then . Setup for 500 ft drag racing . Thanks
Thats too low for 500ft. 300ft it would be perfect. Will top out in less than 500'. Need to stay out of overdrive to be fast.
rx1 fern
TY 4 Stroke Junkie
Thanks . What would you recommend for gearing for me . It’s a 2015 ltx with spi header and sandale muffler with free airbox mod . Gonna tune it with power commander stuff . Thanks for advice also
I assume with that track you will always be racing in snow. You need right in between the 24/50 and 21/49. Dont see anything stock on Yamahas that fits the bill.
rx1 fern
TY 4 Stroke Junkie
Yup . We race 500 ft snow drags . Should I gear the top down a couple teeth or what you think then . Need it to pull for 500ft . Thanks
rx1 fern
TY 4 Stroke Junkie
What’s a good ratio I should go by . 9 tooth drivers 2.86 pitch . Thanks again
22/50 should be close. I know that gear is available but haven't checked chain fit.
Studroes144
TY 4 Stroke God
Something we learned right away the first year, 2 identical sleds (ltx se and xf7000) except for clutches and gearing. 24/50 for the viper, 21/49 for the cat. Box stock the viper with taller gearing was quicker off the line, better mid range pull and more top end. The same sleds with the same type of clutch kits then and results were still exactly the same. Traction is your biggest friend, I'd focus my time and money on making sure the sled gets out of the hole and then let the torque do the rest..if your clutching is working well with your machine the stock gearing is perfectly fine for 500' drags.
rx1 fern
TY 4 Stroke Junkie
But I’ll be putting a bigger lug track on . Figured I’d have to do some gearing change . Backcountry snocross 1.75
Studroes144
TY 4 Stroke God
No true way to know without some go old trial and error, from what I've seen tho with these machines is they like to be worked rather than just revving them out with low gearing.
Kkurz
Expert
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(Yamaha powered)
Could you explain this a bit? I have only a Sandale can, and no other driveline mods so far so I'm really watching this thread. Just trying to figure out if putting a can on my 7000 is opening an expensive can of worms... Will I be hitting the rev limiter every time I blast off? Am I safe to open up the airbox more, or is that going to require clutch work?
