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General Minitrail Talk
Modifications
Trans mounted clutch... TRX90
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<blockquote data-quote="SS LS1" data-source="post: 167997" data-attributes="member: 8999"><p>Good write up posts about the power delivery through the semi auto clutch systems. Helps us all understand what is going on inside the clutch housing. Your write up answers many questions but also creates a few more but I don't want to hijack your post more than I have already.</p><p></p><p>So relating to the exact clutch setup you have .......... I have seen a 114cc V2 head engine built out of a Honda TRX 90 motor that has the same crank centrifugal clutch and the transmission mounted "manual" clutch like you have posted. It was being raced in a TRX 90 quad chassis so the traction was high and his son was experiencing clutch slippage of the fiber disk manual clutch assembly. The first solution was to shim the stock "manual" clutch springs for more clamping pressure and eventually he used stronger CR80 clutch springs that stopped the clutch from slipping. </p><p></p><p>Then to gain a hole shot race advantage he converted the 90 motor to a full manual clutch. He modified the clutch cover and adapted a cable to the clutch cam plate allowing him to activate the clutch by a hand lever. Also removed the centrifugal clutch and it's rotating weight for better acceleration.</p><p></p><p></p><p>However what if you did the same thing (added clutch hand lever control) but also kept the centrifugal clutch still? Would you now have the ability to "pop the clutch" on a semi auto motor without holding the shift lever down with your foot?</p><p></p><p>I'm thinking this would work like a Rekluse clutch where you can feather or control the clutch with your hand while still retaining the centrifugal clutch that would prevent stalling the engine if you came to an abrupt stop without pulling in on the clutch lever. Thoughts?</p><p></p><p>[MEDIA=youtube]aMx0XYPmn7I[/MEDIA]</p></blockquote><p></p>
[QUOTE="SS LS1, post: 167997, member: 8999"] Good write up posts about the power delivery through the semi auto clutch systems. Helps us all understand what is going on inside the clutch housing. Your write up answers many questions but also creates a few more but I don't want to hijack your post more than I have already. So relating to the exact clutch setup you have .......... I have seen a 114cc V2 head engine built out of a Honda TRX 90 motor that has the same crank centrifugal clutch and the transmission mounted "manual" clutch like you have posted. It was being raced in a TRX 90 quad chassis so the traction was high and his son was experiencing clutch slippage of the fiber disk manual clutch assembly. The first solution was to shim the stock "manual" clutch springs for more clamping pressure and eventually he used stronger CR80 clutch springs that stopped the clutch from slipping. Then to gain a hole shot race advantage he converted the 90 motor to a full manual clutch. He modified the clutch cover and adapted a cable to the clutch cam plate allowing him to activate the clutch by a hand lever. Also removed the centrifugal clutch and it's rotating weight for better acceleration. However what if you did the same thing (added clutch hand lever control) but also kept the centrifugal clutch still? Would you now have the ability to "pop the clutch" on a semi auto motor without holding the shift lever down with your foot? I'm thinking this would work like a Rekluse clutch where you can feather or control the clutch with your hand while still retaining the centrifugal clutch that would prevent stalling the engine if you came to an abrupt stop without pulling in on the clutch lever. Thoughts? [MEDIA=youtube]aMx0XYPmn7I[/MEDIA] [/QUOTE]
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General Minitrail Talk
Modifications
Trans mounted clutch... TRX90
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