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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Centre of flywheels and lateral centre of weight for a twin engine.
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<blockquote data-quote="Monkeypants" data-source="post: 19622" data-attributes="member: 2708"><p>timetraveller, hadn't thought much about the exhaust yet but thanks for the reply as ground clearance could be an issue with the shifted engine.</p><p>I'm planning to use an exhaust similar to that on Jos Van den Ouden's Egli. The pipes twist under the engine an rise up on the left side. The way the pipes are tucked in should allow for very extreme lean angles on either side.</p><p></p><p>David, I don't know what the HP of this engine will be. I don't think any exactly like this have been built just yet, not with this particular combustion chamber design.</p><p></p><p> The top end is Terry Prince's latest version of his 92MM bore squish head setup. The crank is 102MM, which gives 1350CC, compression ratio is 10.5 to one , carbs are 40 MM, cams are Terry's lightning cams. I think Peter Volkers has these cams in one or more of his bikes. They keep producing more HP as the RPMS go up past 5500 whereas the Vincent Lightning cams drop off in power above 5500 rpm.</p><p>Terry's 1200cc RTV Vincent's were 85HP when those were built about 20? years ago. Since then his head design has had almost as many changes and power upgrades as Terry has had trips to Bonneville. </p><p></p><p>I think the fat tire will be needed, if not at least it will look the part!</p></blockquote><p></p>
[QUOTE="Monkeypants, post: 19622, member: 2708"] timetraveller, hadn't thought much about the exhaust yet but thanks for the reply as ground clearance could be an issue with the shifted engine. I'm planning to use an exhaust similar to that on Jos Van den Ouden's Egli. The pipes twist under the engine an rise up on the left side. The way the pipes are tucked in should allow for very extreme lean angles on either side. David, I don't know what the HP of this engine will be. I don't think any exactly like this have been built just yet, not with this particular combustion chamber design. The top end is Terry Prince's latest version of his 92MM bore squish head setup. The crank is 102MM, which gives 1350CC, compression ratio is 10.5 to one , carbs are 40 MM, cams are Terry's lightning cams. I think Peter Volkers has these cams in one or more of his bikes. They keep producing more HP as the RPMS go up past 5500 whereas the Vincent Lightning cams drop off in power above 5500 rpm. Terry's 1200cc RTV Vincent's were 85HP when those were built about 20? years ago. Since then his head design has had almost as many changes and power upgrades as Terry has had trips to Bonneville. I think the fat tire will be needed, if not at least it will look the part! [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Centre of flywheels and lateral centre of weight for a twin engine.
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