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3/10/2018
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Powell, WY
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03cr250rhm
3/15/2018 10:05am
3/15/2018 10:05am
My brother picked up a 94 cr250. The bike bogs in low rpms with no power but once we hit the power band the bike rips..
The Shop
This should help.
https://youtu.be/BCiomnbRoaQ
And this...
Clogged silencer?
Air screw ( should be around 1.5 out)
Reeds..
Also if the cylinder has been off there is a pin (if I am remembering correct) that has to be lined up with the arm that works the powervalve. If that is not aligned, it can be stuck open and you will have little low rpm power.
Also check your carb, clean it completely. Make sure the main needle jet is opening and closing and 'seating' correctly. If there is a groove on the rubber needle replace it. Replace both the pilot and main jet, they're cheap.
Check the reed's, make sure they aren't chipped or cracked. Also make sure the reed cage is sealed and not sucking in air. (this is a big one)
On a lower probability if you can swap coils with another CR250. Sometimes the coils go bad and act funky at different RPM's until they finally die.
On the far low end, a clogged silencer with gooey packing can severely restrict a 2 stroke too.
Fresh gas? 32:1? Fresh spark plug gapped properly? Clean air filter? These are also potential issues. Make sure the tank is clean and free of debris, same with the fuel line. You'd be surprised what a couple specks of dirt can do to an engine.
Pit Row
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