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1994 Yamaha Warrior Starting Problems

Vulcan245

By Vulcan245
in Yamaha ATV Forum

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Vulcan245 Newbie

Vulcan245

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Posted

Ok i have a 1994 yamaha warrior, i just got it bored 20 over, got the wisco piston to match ok. so i got and put the top end back together and it wount start, it will backfire somtimes but thats it.

I checked for spark... good check for gas...good check for compression.......maybe 20psi

WTF i just had it bored and a new piston and rings. now if i put a cap full of oil in the cyclinder and crank it, it has tone of compression. i have the piston installed right (arrow pointing to the exaust) ajusted the valves checked the timing i even tryed retarding and advancing the timing but in the end i get nothing... can someone plz help me im trying to get it up and running for rumble on the ridge..

marioweldinginc Veteran

marioweldinginc

Posted
Posted (edited)

You might have the rings in the wrong order or not clocked correctly. Im not sure what your total ring count is but if adding oil raises compression significatly its a problem with the rings or cylinder wall. Timing or valves has nothing to do with it.

Were you able to seat/cycle in the new rings? Until they mate together your compression will be on the low side. Id hate to say iy but i would tear down the motor and check your rings and position. Maybe you put one of the rings upside down

Sent from my SGH-T959V using Tapatalk

Edited by marioweldinginc

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