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Post by allmud on Nov 16, 2012 21:20:58 GMT -5
hi all i have a cpl of scotters both the same
i have just picked up a tidy bolton 50cc 4 stroke
i have removed the airfliter restrictor and cut the pink wire cleaned the carb
made no real diffrence
it has a top rev miss
any iders on fix or what to look for would be good
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Post by 90GTVert on Nov 17, 2012 9:39:29 GMT -5
:welcome: to the forum.
It'd be a good idea to check the jetting since you messed with the airbox. Check your spark plug gap (should be around .024" - .028), all connections of the ignition system, and make sure your ground wires are all secure.
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Post by Fox on Nov 17, 2012 11:05:50 GMT -5
Yeah removing any air restrictions can and usually will make them fall on their face at wide open throttle.
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Post by allmud on Nov 17, 2012 18:14:48 GMT -5
sweet thanks for the reply
it had the topend miss when i got it
hadent been used for 12mths before i got it
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Post by Fox on Nov 17, 2012 19:10:24 GMT -5
Since it's been sitting for so long I would have a look at every single vacuum hose for cracks, and also check the rubber intake boot where the carb mounts for cracks. They usually crack where the clamp is on the underside. A little sea foam or some other gas treatment in the gas tank can't hurt. I've also seen where a cracked spark plug wire or spark plug boot will allow the spark to jump to the frame or the cylinder head before it gets to the plug causing a high speed miss so check the plug wire and boot out carefully. Other times the two wire connectors on the spark coil are loose. If they are loose remove both of them and squeeze them a little with pliers so they grab onto the coil firmly when you push them on.  I would also check the valves clearances just to be sure they are correct. VERY IMPORTANT! I set 'em both to .05mm or .003 in. Here's Brent's video tutorial: |
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