Question about 1981 Yamaha XJ 650
You need to do basic diagnoses - 1 compression test,should be better than 130 lb and if in good order around 170 and all cyclinders within 14lb. 2 - check and make sure you have spark at all 4 spark plugs. 3- check and make sure you have fuel in carbies by undoing drain screw in each bowl, if above 3 all ok you probably have stale fuel and will need to remove carbs and clean out jets. this model also suffers from worn butterfly shaft through carbs which creates air leak and the manifolds to the head also leak and **** air.
Posted on Aug 11, 2010
Check valve clearance
Posted on Jul 20, 2010
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Posted on Jan 02, 2017
Change oil and, filters regularly; lube the throttle cables and, all moving parts drain the fuel tank and, replace the fuel filter every year, or; when needed. never leave fuel in the bike when you store it without using "stabil" only check your ignition with a timing light get a maintenance schedule from the bike's manufacturer and, follow it.
Posted on Aug 02, 2009
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