killerklown
Member
Anybody make rail extensions that will take my Viper from 121 to 144 without changing to 8 tooth drivers?
brother in law has a set on a suspension in his garage. They are far from new as have been on three sleds that I know of. I can see if he wants to get rid of them if your interested.
I believe both the Hartman and Mountain Performance extensions allow you to use the stock drivers unless using a 2" track.
Suprx125
New member
Mountain Performace makes them, but not the whole kit anymore. And they don't extend the hyfax. Hartmans 144 kit relocates the skid, so your technically adding 136 rails to your skid, then moving the skid back makes up for the rest. Tracks USA also makes nice looking extensions, but I recommend the Hartman tunnel extension. You only need 8 tooth drives if your going to a tall lug track. If you stay under 1.5, you'll be fine with the stock ones. You should gear down a tooth though on the top gear.
If you are going to 144, I would buy the rail extensions for 136 and then relocated the suspension back 4". This will give a much better approche angle and a smoother ride. ie, more centered weight. We have tracks USA extension on the Viper. Works flawless. Oh, you can make your own tunnel extension for about $35.00 Al
super1c
Super Moderator
Track Usa Tip Up Extensions Are Awesome. Love Them So Far. Ride Great On The Trail And Seem Nice In The Small Amount Of Powder So Far. Mine Are 121 To 144 On A Stock Proaction. Rinning A Cobra 1.352 And Stock 9 Tooth Drivers.