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`05 viper 90r 2 stroke?
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Posted by: jfwyatt

my sons viper has lost power when climbing hills. the engine bogs istead of staying revved up like it used to. any ideas? ive checked copression its just as good as new and cleaned the carb which didnt change anything and the cdi is turned all the way up.

Posted by: nordic quad

Maybe a bad torque spring?

Posted by: etondaddy

quote:
Originally posted by nordic quad
Maybe a bad torque spring?

Yep next place to go is the clutchs..... is it good on the flat...??

Mike Kozura

Posted by: jfwyatt

still does pretty good on flat ground the hills are whats giving trouble. Also should i put stock back in or upgrade to a 1500 rpm red torque spring and maybe even the upgraded clutch springs?

Posted by: etondaddy

First get the clutchs all apart and check it out (front and rear). Is the motor stock..?? making clutch mods with out more HP will make it worse. If the motors stock just freshing it all up will make it run like it used to. Did you check the comp. with a gauge....what did you get.

Mike Kozura

Posted by: jfwyatt

fixed it the rollers in the variator had worn grooves and were hanging up. sanded the grooves smooth and the problem is fixed new variator should be here next week. thanks for the input.

Posted by: etondaddy

10-4........

Mike Kozura