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Help guys 2014 viper backfiring stalling

yamahartx

Newbie
Joined
Jan 17, 2023
Messages
12
Age
40
Location
Belleville
Country
Canada
Snowmobile
Yamaha viper
OK guys looking for some assistance.
Have a 2014 viper new ecu and crank sensor installed at local dealer. Now the sled is backfiring and stalling on the trail .... it sounds like the timing is out . What should I do now
 

Backfires threw the exhaust . I did blow a top gear last year in the chain case not sure if that has anything to do with it
 
One thing to check is the tone wheel on the stub shaft. There have been cases found where it is no longer aligned per the notch on the splines and this directly offsets ignition timing as this tone wheel is what reads crankshaft position. To check this, you need to pull the primary clutch and then remove the stub shaft from the engine.

If you search on this site, I'm sure you can find pictures of the proper alignment for tone wheel to spline teeth.
 
OK I'll check that next having nothing but issues this year . I did read about this issue. Saw some pictures do you know what causes this
 


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