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Ask Jeff Policky Your Own Question
Jeff Policky
Jeff Policky, Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 2452
Experience:  Yamaha Gold, Suzuki Gold, Honda Bronze, Polaris Bronze, BRP
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rebuilt 1996 rm80 2-stroke...piston..have spark but no firing.

Customer Question

rebuilt 1996 rm80 2-stroke. did not hone and replaced with standard piston. have spark but no firing. What top end problems would cause that? Thx.
Submitted: 5 years ago.
Category: Motorcycle
Expert:  Jeff Policky replied 5 years ago.
did you replace the piston rings?
Customer: replied 5 years ago.
there's only one ring and yes I installed a new one with the new piston.
Expert:  Jeff Policky replied 5 years ago.
with out honing the cylinder you new rings will not seat in to the cylinder well. making for a little loss of performance and loss of ring life. nothing to cause a no start. is the piston installed with the arrow pointing to the exhaust port?
Customer: replied 5 years ago.
It is... I believe it's a fuel issue. I cleaned the carb, all looked good. didnt replace the reeds. I think they work either way...no such thing as upside down? Plug isnt very "wet" when I pulled it to test for spark. Thoughts?
Expert:  Jeff Policky replied 5 years ago.

reeds all depend on what style they are. I agree on the fuel issue. test this out by putting a 1/8 of an ounce in to the spark plug hole and see if it will try to start then

 

let me know what happens