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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Starts, runs then slowly "chokes up"
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<blockquote data-quote="Martyn Goodwin" data-source="post: 110269" data-attributes="member: 2433"><p>I would revisit the fuel tank cap. With it removed try blowing thru the hole in the top and feel for the breeze from the hole underneath (it NOT the same hole). If it is NOT free flowing run a drill bit thru BOTH holes - will do no harm to enlarge them slightly then repeat the test. If its still a problem try a different fuel tank cap. I had EXACTLY the same issue and this was the fix.</p><p></p><p>Just an afterthought - when riding is there ANYTHING on top of the fuel cap - like a tank bag - that could block the breather??</p></blockquote><p></p>
[QUOTE="Martyn Goodwin, post: 110269, member: 2433"] I would revisit the fuel tank cap. With it removed try blowing thru the hole in the top and feel for the breeze from the hole underneath (it NOT the same hole). If it is NOT free flowing run a drill bit thru BOTH holes - will do no harm to enlarge them slightly then repeat the test. If its still a problem try a different fuel tank cap. I had EXACTLY the same issue and this was the fix. Just an afterthought - when riding is there ANYTHING on top of the fuel cap - like a tank bag - that could block the breather?? [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Starts, runs then slowly "chokes up"
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