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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet badly tuned or just underpowered?
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<blockquote data-quote="gwild" data-source="post: 22656" data-attributes="member: 242"><p>Thanks to all for the pointers. </p><p></p><p>Further specifics of the bike as far as I can remember: </p><p>Compression: stock or only slightly higher if I remember correctly</p><p>Plug: BPR5E1X (Iridium as recommended by the forum)</p><p>Rear sproket: stock</p><p>Silencer: Burgess straight through</p><p>Piston clearances: as honed by a well-known member of the VMCC based in Bristol.</p><p>Passenger and myself: not yet privilege to enough years of beer drinking to nuture proper weight behind us.</p><p>Magneto: was rebuilt at the same time as my build, only 2 years/ 1500 miles ago by very capable Oxford member who is very professional so I would be surprised if it was going off.</p><p>ATD: rebuilt by Roy Price at the same time.</p><p>Fuel: the normal cheap stuff</p><p></p><p>I will follow consensus and check and set ignition timing to 34 BTDC following Tom's advice probably Sunday.</p><p></p><p>When at speeds around 60 MPH the engine seems to be at very high revs with an almost homogenous tone, should I be worried? Once again this is my inexperience knowing what it should sound like.</p><p></p><p>Thanks again for your kind suggestions, I will report back.</p><p></p><p>Gwild</p></blockquote><p></p>
[QUOTE="gwild, post: 22656, member: 242"] Thanks to all for the pointers. Further specifics of the bike as far as I can remember: Compression: stock or only slightly higher if I remember correctly Plug: BPR5E1X (Iridium as recommended by the forum) Rear sproket: stock Silencer: Burgess straight through Piston clearances: as honed by a well-known member of the VMCC based in Bristol. Passenger and myself: not yet privilege to enough years of beer drinking to nuture proper weight behind us. Magneto: was rebuilt at the same time as my build, only 2 years/ 1500 miles ago by very capable Oxford member who is very professional so I would be surprised if it was going off. ATD: rebuilt by Roy Price at the same time. Fuel: the normal cheap stuff I will follow consensus and check and set ignition timing to 34 BTDC following Tom's advice probably Sunday. When at speeds around 60 MPH the engine seems to be at very high revs with an almost homogenous tone, should I be worried? Once again this is my inexperience knowing what it should sound like. Thanks again for your kind suggestions, I will report back. Gwild [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet badly tuned or just underpowered?
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