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|Topic Started: Jan 23 2006, 07:47 PM (1,749 Views)|
|polaris_racing_101||Jan 23 2006, 07:47 PM Post #1|
|Hey i was wondering why my dirtbike wasn't runing right when it was runing and to get it to start ya gotta jump start it or tow it i know it has something to do with the carberator and if noone buys it i was wondering if borin it out would be a good idea|
|TRX450R14||Jan 23 2006, 08:56 PM Post #2|
Every engine needs fuel,spark,compression to run.You should start with looking at the spark plug.It is the best way to troubleshoot problems.first check to see if you are getting spark..if you are then check what color the center electrode is.If it is
grey or white you have a lean condition which could be a number of things,,ex wrong(too small)pilot jet,clogged carb circuitry,etc.If it is black(sooty) then you have a rich mixture,,ex dirty air filter,pilot jet too big.There are so many things that
can cause an engine to not start but I would check the simple things first.Pull the spark plug,put the boot back on and rest it against a metal part of the bike,get someone to kick it over while you watch for spark.It should be a bright blue spark.if it is weak or kinda yellow the problem is in your ignition system ex,,plug,wire,boot,coil,etc.Both fuel and ignition problems can cause an engine to start/run poorly.Trying to diagnose that kind of problem without better information
and seeing what is going on is very difficult.
If you could possibly explain in detail what you mean by not running right i will try to help you out.
As for boring it out...boring a worn out cylinder is a normal repair procedure,but are you doing it because you want to or because you think it should be done.
Usually the rings on the piston wear before the cylinder does so i would check that first.The best way to check for cylinder wear,bad rings,leaking valves is with a
compression tester.Explain why you are considering boring it out?
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