Advice needed on old thumper - 1980 XR250

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WNaude

Race Dog
Joined
Feb 4, 2013
Messages
1,258
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4
Location
Australia
Bike
BMW R1150GS Adventure
Hi Guys,

Did a complete engine rebuild and restoration on the bike about a year ago, so I dont think it's a mechanical problem.

Recently what happens is it starts easy and idles perfect, when turning the throttle it sounds good, but the moment I put it in gear and start riding for a minute or so it starts missing and pulls dead eventually. When I kick it again it idles perfectly but the moment I engaged 1st and starts riding, same story.

I removed the carb, cleaned all the jets and gave it compressed air. Even replaced the fuel line and fuel filter as I thought it might be creating a vacuum. still the same story.

I did not adjust the float though as it is picking up reffs the moment I twist the throttle in neutral.

Not sure what the problem is.

Any ideas what the problem might be?
 
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