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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet for the 2020's
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<blockquote data-quote="vibrac" data-source="post: 88429" data-attributes="member: 60"><p>Next 'problem' I have is carburation I am a dedicated Mikuni fan for Comet use my cooking Comet on a V28 (28mm) Mikuni was exceptional from the box with one pilot jet change. Now I have a 90 bore engine the Compression ratio has gone up from my estimate to a tad over 8:1 (mainly because the HD decompressor is full length 14mm) and the head is 32mm at the port I was intending to fit the 28mm Mikuni again and was planning on belling out to 32mm over the Et32/21 inlet adaptor length and was wondering what changes in settings I would need, My alternative is to get a 32mm carb - I think that would necessitate a special 32mm inlet adaptor and a whole new set of settings which I guess Allens (UK) would help with but wouldn't be out of the box like the 28 and really for touring use might be a lot of effort for small return. Comments and setting suggestions welcome</p></blockquote><p></p>
[QUOTE="vibrac, post: 88429, member: 60"] Next 'problem' I have is carburation I am a dedicated Mikuni fan for Comet use my cooking Comet on a V28 (28mm) Mikuni was exceptional from the box with one pilot jet change. Now I have a 90 bore engine the Compression ratio has gone up from my estimate to a tad over 8:1 (mainly because the HD decompressor is full length 14mm) and the head is 32mm at the port I was intending to fit the 28mm Mikuni again and was planning on belling out to 32mm over the Et32/21 inlet adaptor length and was wondering what changes in settings I would need, My alternative is to get a 32mm carb - I think that would necessitate a special 32mm inlet adaptor and a whole new set of settings which I guess Allens (UK) would help with but wouldn't be out of the box like the 28 and really for touring use might be a lot of effort for small return. Comments and setting suggestions welcome [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet for the 2020's
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