Thread: 250 shineray , stumped?
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#1 250 shineray , stumped?
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10-24-2008, 12:06 AMI just bought a used 250 shineray atv, Has spark getting feul but will not start, turns over and tries real hard but no go. I cleaned the carbs and changed the plugs but nothing. The guy I bought it from had it running and he said it just backfired and stalled one day and wouldn't start. Any ideas would be apreciated thanks
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10-24-2008, 06:25 AM
Fuel and spark are good, how about compression?
If it backfired and stalled, could have damaged a valve.
Cheers!
ChinaV
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10-24-2008, 02:55 PMI tried the wd-40, havn't checked the compression yet. I was told to check the timong anyone know how to go about this?
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10-24-2008, 04:02 PM
Checking timing depends on the type of timing system you have on your bike.
If it's overhead cam, then there will be marks on the cam that should be parallel with the edge of the head when the engine is at TDC (Top dead center) usually marked on your flywheel down by the alternator.
It would be helpful to snap some pics if you've already got the engine apart.
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11-14-2008, 03:14 PMchecked the compression all is good, had another guy I know say he had timing issues with his, I'll snap som pics today thanx
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12-30-2008, 09:51 PMDidn't get to pics but the engine is a 250 twin 4 stroke ohv, don't know if this will help any thanks again
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12-30-2008, 10:21 PM
Can you find an online diagram of the engine?
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12-30-2008, 11:26 PMIt's difficult to work up enthusiasm with so little information. The complete model number of the ATV, for example and the engine type number. This is stamped somewhere on the crankases and it would help a lot.
Does it look like this?:
In that case it could be the 253FMM, or if it has a reverse gear it becomes 253FMM-C
One or two carburettors?. The version with one carb is the 253FMM-B
It could be made by LIFAN, DYK or other makers, and it's used on cruiser-type bikes and in the version with reverse, several ATV's.Last edited by forchetto; 01-02-2009 at 10:27 AM.
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12-31-2008, 03:01 PMthanks for the fast response. it's the 253FMM-C with twin carbs any other info would be apreciated thanks again
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