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Post by fredperrybruce on Jul 31, 2013 14:09:00 GMT
Hi all,
been having trouble with my px at low revs, when I'm at low revs the scoot surges forward like a jolting feeling. Once I open the throttle up it stops but soon as I drop the throttle it starts to jolt almost like a jockey on a race horse.
I have recently changed the exhaust to scorpion and changed the main jet/mixture screw to match but not touched the slow running jet, could this
be the problem???
I have taken out Carb cleaned all jets changed seals/gaskets and still nothing's changed.
Cheers
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vespasian
High Number
greater manchester
Posts: 235
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Post by vespasian on Jul 31, 2013 16:08:10 GMT
does sound like a fuel starvation problem,is the main jet the right size? ,,..if your using a standard 20/20 carb,[px125]the main jet i reckon should be 98 to 100
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Post by fredperrybruce on Jul 31, 2013 16:16:27 GMT
It was being an arse when I had a 96/98 stock exhaust in, then I changed to a scorpion exhaust drilled hole in filter stuck a 102 main in and still the same. I may need to up the other jet next too.  |
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Post by fredperrybruce on Jul 31, 2013 16:20:34 GMT
Well my thinking is,,,,if the scoot is jumping about in low revs then it must be the slow/idle jet which needs to be up jetted a few points
As when I open the throttle half/3 quaters it clears when the main jet kicks in.
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vespasian
High Number
greater manchester
Posts: 235
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Post by vespasian on Jul 31, 2013 18:22:22 GMT
Well my thinking is,,,,if the scoot is jumping about in low revs then it must be the slow/idle jet which needs to be up jetted a few points As when I open the throttle half/3 quaters it clears when the main jet kicks in. no harm trying a 48 in it,,but i doubt it will solve the problem |
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Post by fredperrybruce on Jul 31, 2013 23:30:12 GMT
Will give a 48 a try tomorrow, will let you know how I get on
If that doesn't work any other suggestions?
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vespasian
High Number
greater manchester
Posts: 235
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Post by vespasian on Aug 1, 2013 14:52:18 GMT
air hole in fuel cap blocked? debris in tap?is the carb slide working correctly?is the throttle cable sticking?
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Post by fredperrybruce on Aug 1, 2013 17:17:38 GMT
Just been to shop and stuck a 55/140 in and it has worked a treat,
took few attempts with different sizes but got there in the end.
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