Posts
78
Joined
2/21/2013
Location
Hillsborough, NJ
US
MXRICH
8/4/2018 2:10pm
8/4/2018 2:10pm
Guys,
HELP. 2008 YZ 125. Sounds crisp until you hold it wide then it breaks up. I rebuilt carb with stock jets. Bike is stock. Put in new crank seals, new top end. TILL happening. Carb has all new float, jets, seat etc.. Measured fuel level. My gut tells me MAYBE reed or coil??? Coil ohm to spec. PLEASE any help would be appreciated.
Old piston looked good. Idling high even with throttle cable out.
Thanks
HELP. 2008 YZ 125. Sounds crisp until you hold it wide then it breaks up. I rebuilt carb with stock jets. Bike is stock. Put in new crank seals, new top end. TILL happening. Carb has all new float, jets, seat etc.. Measured fuel level. My gut tells me MAYBE reed or coil??? Coil ohm to spec. PLEASE any help would be appreciated.
Old piston looked good. Idling high even with throttle cable out.
Thanks
Paw Paw
Where should I look? Been over it twice
The Shop
How did you find the leak on your son?
Sandman,
Breaks up either on the stand or when being ridden.
Pulled the reeds last night. Excessive gas in the intake area.
Spraying ether, carb cleaner, WD40, etc at the running engine had no duplicatable effect, though that method has worked for me in the past.
That is my plan on Friday. My understanding is the power valve shouldn't pass air so is it necessary to block the vent tube?
I was able to slowly keep pressure with the bicycle tire pump, just enough to find the air leak. Much easier with 2 guys, one to pump and watch the pressure gauge, another to spray and look for bubbles.
Also, check for pressure escaping from the transmission vent tube. If this is occurring, you either have a bad right side crank seal or the center cases have a leak.
It i escaping through the seal for the power valve shaft. I was forward thinking and ordered them along with crank seals. Arrived today. Will replace in the am. The air pressure bleeds off immediately. seal behind flywheel is good. Frustrating as hell. head gasket, intake all look good. Anyway to to tell if clutch side seal is leaking WITHOUT pulling basket?
THANK YOU!!
Pit Row
THANK YOU ALL!!
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