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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Idle Mixture Jet Size - Dell Orto Carbs
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<blockquote data-quote="BobFletch" data-source="post: 17497" data-attributes="member: 2156"><p>Thanks again Bill - I hope to progress to worrying about max speed and fuel flow once I've got the botttom and mid range sorted. I'll let you know how it goes. This business seems incredibly iterative. So once I've got the main jets nailed down I'll probably have to start with idle and needles/slide again - ho hum!! One thing I have discovvered though is that the engine prefers different size main jets in the front and rear cylinders. Seems you have to treat them as 2 separate 660cc singles to cope with different airflows, exhaust lengths etc. </p><p></p><p>Anyway I now have a 155 jet in the front and a 145 in the rear and the mixtures as measured on the dyno are spot on - I live and learn.</p><p></p><p>best wishes</p><p>Bob</p></blockquote><p></p>
[QUOTE="BobFletch, post: 17497, member: 2156"] Thanks again Bill - I hope to progress to worrying about max speed and fuel flow once I've got the botttom and mid range sorted. I'll let you know how it goes. This business seems incredibly iterative. So once I've got the main jets nailed down I'll probably have to start with idle and needles/slide again - ho hum!! One thing I have discovvered though is that the engine prefers different size main jets in the front and rear cylinders. Seems you have to treat them as 2 separate 660cc singles to cope with different airflows, exhaust lengths etc. Anyway I now have a 155 jet in the front and a 145 in the rear and the mixtures as measured on the dyno are spot on - I live and learn. best wishes Bob [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Idle Mixture Jet Size - Dell Orto Carbs
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