Question about Motorcycles
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Posted on Jan 02, 2017
it the bike has been sitting for a long period of time. the carb. can gum up. pull the carb. off. clean it up really good. insuring you get all the small ports clean. then try it again.
every dirt bike i've had requires a oil wetted air filter. dont forget about that.
Posted on Feb 23, 2009
Clean the air filter and, if you have one, remove the water trap bowl on the fuel petcock and clean it. How good is the battery? Install new STOCK plugs. Bear in mind it may be time for carb kits. Other than your cleaning the carbs, the carb kits and balancing and synchronizing of the carbs are best left for the shop to do.
Check the exhaust pipes. If there is a restriction in the burned gases exiting the tailpipe then the bike will not run right, will loose power and even die if too much back pressure builds up. Disconnect the exhaust system and tick off the neighbors with a quick ride around the block without a muffler. If the engine still dies then exhaust is not likely to be the problem.
Check the compression on all cylinders. Depending on the compression, the bike may be ready for a valve job. If you pull the head for the valve job then you might as well consider re-boring the cylinders and install new pistons and rings. Bear in mind, doing a valve job and / or pistons is not recommended for the novice. The good part is that when the work is finished you will effectively have a new engine.
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Posted on Mar 25, 2009
SOURCE: Won't idle without choke
The pilot jet controls the air/gas fuel mix at idle . If the jet gets plugged up not enough gas gets to the emgine at idle. You will need to remove the carbs and float bowls and clean them, paying special attention to the pilot valve. Count the number of turns to remove the pilot screw and replace the same number of turns then turn counter clockwise 1/2 turn.
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Posted on Jun 30, 2009
SOURCE: 1983 Yamaha Seca 750 no spark
Check the battery should be 12V or more , Then check the coils the connections are under the gas tank make sure they are securely connected.
What kind of fuse box do you have? The glass fuses? Or did you replace the fuse box. If it is the glass fuses you need to replace with a new fuse box.
Check the kill switch and the side stand switch.
Check the coils too..
Posted on Oct 04, 2009
Sounds like it may be drawing air around the intake somewhere. Let it idle and spray around carefully with wd-40 until it speeds up. This will reveal the leak.
Posted on Oct 11, 2009
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