Drivers

[Doowithblue]

What tooth drivers are on the rtx/ltx sleds?

 

[snowbeast]

What tooth drivers are on the rtx/ltx sleds?

(9 tooth I believe. I guess I did not proff read my thread,i missed the 9 lol,ya its 9 tooth.

 

[stevewithOCD]

( tooth I believe.

I think that's a capital 9...lol

 

[Doowithblue]

Wow these things are geared low. 120mph. I wonder if many will run 22/40 vs 21/41?

 

[snowbeast]

Wow these things are geared low. 120mph. I wonder if many will run 22/40 vs 21/41?

I will wait and see how the stock gears are working,21/41 could use like you said 22/40 and maybe get away with stock chain length.

 

[waldo1]

should be same as viper - 9 tooth - 2.86 pitch - yamaha dosent make a 40 lower - 22 41 with a 86 link chain is tallest option at 1.86 ratio - id like to run a 24 41 on viper turbo but they dont make an 88 link chain,,, nobody does - its a borg warner chain - i called them and couldnt get one - had to remove links from a 90 or 92 - thanks scott taylor. or just buy what u want from him - gears look better. dont put 2015 or less cat #*$&@ in your case - weaker chain and gears. remember - different overdrive clutches on winder - if they do add 15% u wont need much taller if it sees 120 already. a 22 tooth upper 41 lower and 86 link chain will just squeez on.. its the same case inner as viper.
- the 86 chain i used was brand new, as a trail viper comes with 50 24 92 chain. shitty gear ratios for stock vipers - everything beets em on top end - too low at 2.08.
- only chains yamaha offers is 86 link, 90 and 92
- top small gears are 21 22 and 24
- lower is 50, 49, 48 and 41...
stock nytro 144 0r 120 - 21 39 - 1.87 ratio
stock sr viper 129 or 137- 24 50 - 2.08
stock sidewinder 129, 137- 21 41 - 1.95 - but has new clutches which add 15% - this changes things! id say with the old math - the new 1.95 is = to about 1.67 - which is perfect for a 210 hp trail sled
- we run 1.69 (23 39) in our mpi super nytros at 210hp or about 8 pounds o boost. ive seen over 130 on the gage which is off about 6% compared to viper same speed is 123. on a hard ice surface.
- we run 1.87 (22 41) in hurricane vipers at 230hp or so at 9 pounds o boost. i see 122 mph but she slows up at 110 - needs taller gears like 1.65 or so.

 

[Byam]

22-41 wil not fit the 86 link chain, its to tight...

 

[waldo1]

sorry but --- WRONG - im running that combo on 2 turbos with thousands of miles - its a little difficult to get em on all the splines and lined up but diffidently not too small - theres no other yamaha option to go taller ratio than 21 41 except this - and again , this is for viper that should be the same inside --- this is the only one from yamaha. the chain adjuster was almost all the way out. works fine. actually i like the chain nice and straight up - dont like it when its adjusted in alot - your going around another corner with that adjuster all the way in. scrubben power
- heres a pic of 22 41 86 -

 

[shagman]

22-41 wil not fit the 86 link chain, its to tight...

It will if the chain has already been stretched. Ran that gearing all last winter. Also running it on asphalt. 119 mph @ 9100 RPM with 10 tooth 2.52 drivers in 1/4 mile.

 

[shagman]

should be same as viper - 9 tooth - 2.86 pitch - yamaha dosent make a 40 lower - 22 41 with a 86 link chain is tallest option at 1.86 ratio - id like to run a 24 41 on viper turbo but they dont make an 88 link chain,,, nobody does - its a borg warner chain - i called them and couldnt get one - had to remove links from a 90 - thanks scott taylor. or just buy what u want from him - gears look better. dont put 2015 or less cat #*$&@ in your case - weaker chain and gears. remember - different overdrive clutches on winder - if they do add 15% u wont need much taller if it sees 120 already. a 22 tooth upper 41 lower and 86 link chain will just squeez on.. its the same case inner as viper.

there are lots of aftermarket gears available EVO and Ulmer. I have 21, 22, 26, 27 uppers and 41, 43, 48 lowers and 86, 90, 92 chains. Next set going in for asphalt is 27/43 for 130 something MPH.

 

[Doowithblue]

We had hyvo gears/chain in our doo RT's and they did indeed stretch a little but not a lot. I'm sure it'd be tight with a brand new 21/41 to 22 till u get some miles on it.