viper short track vs. mtn gearing???

[660popo]

i need to know what the stock gearing and chain length is for:
121 viper
144 viper
reason is a friend has converted 121 to 144 and and wants to gear for mtn riding. thanks guys

 

[Sixat38]

Viper (trail 121) was geared 22/38 with a 68 inch chain.
Viper Mtn (144) was geared 21/40 with a 70 inch chain.

If the teeth on your gears add up to 60 or less you need a 68" chain. If they add up to 61 or more you need a 70" chain.

The gear ratio for all Vipers was based off the 9 tooth Viper trail track drivers. However, the Viper Mtn came with 8 tooth drivers therefore was "geared down" a little straight from the factory.

 

[jdracer]

viper

can i put 2inch lug on 9 tooth driver on 02 viper? thanks for the help. is this track 2.52?

 

[rynokron]

can i put 2inch lug on 9 tooth driver on 02 viper? thanks for the help. is this track 2.52?

No. 8 tooth drivers (2.52 pitch) and 2" track are the best you can do without a drop and roll.

 

[jdracer]

I need to get smaller drivers sled is in storage anyone know what size drive shaft in 02 viper 700? thanks for any help.

 

[Sixat38]

What rynokron said is true.

IIRC the shaft is 27mm (1.06") measured from accross the points. Not the flats. I believe I have a set of OEM 8T 2.52's that came off my Mtn Viper at around 600 miles. If your interested I can look for them and send them to you. Some guys will tell you not to reuse track drivers so depending on how you feel about that.... ??? I personally have done it in the past with out any problem. They were presed off with care. Your call.

 

[Norcalsnow]

Dont use OEM drivers. Get anti ratchet unless you track is not fully clipped then your SOL and you have to use standard drivers.