A carburetor rebuild kit costs around $20-30 on ebay. These are very simple carburetors. Once it is off the engine, it is simply a matter of removing the old parts, cleaning the carburetor body, and reassembly.
SOURCE: cam chain xr 250 honda
check the timing marks on the crank and cam make sure they are alligned at tdc
SOURCE: when motorcycle warms up it starts smoking
id say its time for a new set of piston rings sounds like youv got a busted oil ring
SOURCE: How do I clean carbs on 1986 Honda Rebel 250
Gunk makes a carb and parts cleaner, sold in gallon cans, u just submerge the whole set up. First though, I'd take it apart, u dont want to expose any gaskets or hoses to that solution. The easier ( though easier isnt better) way is to try a spray carb cleaner.... available at any auto parts store. Spray it into the throat and work the butterfly and spray the linkage
SOURCE: manual honda xr 500
here is the manual buddy
http://www.themotorbookstore.com/xl50sin19.html
enjoy riding
http://www.thumpertalk.com/forum/archive/index.php/t-491131.html
regards,
voodoo
SOURCE: my honda xr 250 mototrcycle wont idle
Cleaning a carb will not change the jetting. The problem is in the pilot jet. This jet regulates the idle. Pull the carb off again and re-clean it. Remove the air screw and the throttle screw and spray carb cleaner into every hole you can find. Pay special attention to the air screw hole. Now put both screws back in the holes they came out of and turn them inward until they LIGHTLY seat. Now back each screw out one and one half turns. You are back to factory settings now. Get the pilot jet cleaned out and the bike will idle.
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