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if you gear down do you need to make primary clutching changes afterward, to stay at the optimal RPM and Performance?
Change Gearing Question on axys?
- Thread starter ecut
- Start date
I have done the 15 PRO pulley gear down on several sleds and did no clutch changes for our 9K to 11.5 K elevations.
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Yes I am also doing the 15 pro pulley change so that is why im asking.
No changes required although if going lower and then clutching increases performance.
Depends how good your clutching is to start with.
Or how really good you are at clutching...
Generally if your clutching was good from the start, lowering the gear ratio will reduce the torque feedback as seen from the secondary causing the primary to upshift sooner which will result in a drop in shift RPM. This is easy to see, bring a set of a lighter gram weights to compensate. The less noticeable effect of lower gearing is the reduced back shift. To compensate would require a secondary spring and/or helix angle change. Changing those items is more difficult and requires more testing and knowledge. Good luck.
Cinno
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The original clutching was done by Carls Cycle and seems to be spot on.
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Cinno explained the effect of lower gearing very well, great advice and secondary effects to be on the lookout for.
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I have been changing stock gearing lower for the last 30 years and almost every time I have found the stock clutch set up to actually work better with the lower gearing. On occasion I have found overreving just the opposite of what you would think and what others have said happens. This is with stock clutching. If you have already changed clutching to get improvement then I will guess that you will have to make changes to get that same improvement back with the lower gearing. I ride between 4500" -6000"
