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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Big Bore Comet
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<blockquote data-quote="greg brillus" data-source="post: 176356" data-attributes="member: 597"><p>I've not heard of a Godet 600 single........Ours are all 500 cc, but 2 different engine bore/stroke combinations used........Stock French engine uses a 92 x 77.2 mm.......whereas our modified engine uses a 86 x 86 bore/stroke.......This second engine was re engineered by Peter Molloy here in Australia a few years ago.......he was a specialized engine builder who came up with this engine spec combo........Both these engines use a one piece all steel crank with 2 piece shell bearing con-rod.......These engines will rev to 8000 rpm plus, the 92 bore engine even higher......of course they all use a high pressure oil pump and the engine casing has provision for the WR Yamaha type pump.......My engine, i have set the rev limit to 7200 on the limiter but seldom take it past 6200 on the track......It has a huge amount of torque, so simply reving it higher is not really necessary...... i doubt any of the French engines has gone near 60 HP.......The design just simply is not that high a spec......Its power comes from big revs and massive duration cam timing.......There is more that can be done, its just time and money...... The French engine is great, but the top end and cam design is too old school i feel.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 176356, member: 597"] I've not heard of a Godet 600 single........Ours are all 500 cc, but 2 different engine bore/stroke combinations used........Stock French engine uses a 92 x 77.2 mm.......whereas our modified engine uses a 86 x 86 bore/stroke.......This second engine was re engineered by Peter Molloy here in Australia a few years ago.......he was a specialized engine builder who came up with this engine spec combo........Both these engines use a one piece all steel crank with 2 piece shell bearing con-rod.......These engines will rev to 8000 rpm plus, the 92 bore engine even higher......of course they all use a high pressure oil pump and the engine casing has provision for the WR Yamaha type pump.......My engine, i have set the rev limit to 7200 on the limiter but seldom take it past 6200 on the track......It has a huge amount of torque, so simply reving it higher is not really necessary...... i doubt any of the French engines has gone near 60 HP.......The design just simply is not that high a spec......Its power comes from big revs and massive duration cam timing.......There is more that can be done, its just time and money...... The French engine is great, but the top end and cam design is too old school i feel. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Big Bore Comet
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