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General
A misunderstanding not a gearing question
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<blockquote data-quote="69ST" data-source="post: 174588" data-attributes="member: 5"><p>TB sells a few different 117cc "kits" based on a 54mm bore, paired with a 51mm stroke. The most commonly-seen version uses the TB head. So-o-o-o-o-o...all's ya gotta do, in theory, is match the piston's compression height to the crankshaft (i.e. "long rod"/shorter piston, or "short rod"/taller piston...as with an 6v era z50, or CT70, that has the stock crank). If the squish band has zero deck height (i.e. is flush with the top of the cylinder bore, at TDC) you should be good-to-go. TB has already matched the piston dome to the combustion chamber of their own head.</p><p></p><p>I'm a bit surprised that fatcaaat hasn't chimed-in on this one. When it comes to creative engine configurations, he's tried more than just about anyone I can think of.</p></blockquote><p></p>
[QUOTE="69ST, post: 174588, member: 5"] TB sells a few different 117cc "kits" based on a 54mm bore, paired with a 51mm stroke. The most commonly-seen version uses the TB head. So-o-o-o-o-o...all's ya gotta do, in theory, is match the piston's compression height to the crankshaft (i.e. "long rod"/shorter piston, or "short rod"/taller piston...as with an 6v era z50, or CT70, that has the stock crank). If the squish band has zero deck height (i.e. is flush with the top of the cylinder bore, at TDC) you should be good-to-go. TB has already matched the piston dome to the combustion chamber of their own head. I'm a bit surprised that fatcaaat hasn't chimed-in on this one. When it comes to creative engine configurations, he's tried more than just about anyone I can think of. [/QUOTE]
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A misunderstanding not a gearing question
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