Sometime next week and weekend I will be going some place to sled and I will have the BMP clutch setup in my sled to start with. I have it set up for about 9-10K. I should be able to give a detailed report on how it performs after that.
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I ended up with mds weights and black Polaris spring from mds the weights were set at 67.7 grams as per suggestions but I found I had to pull a washer off each weight to hit a decent rpm I am at 8190 on my 162 mountain cat with that setup. I should have tried it stock
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Sometime next week and weekend I will be going some place to sled and I will have the BMP clutch setup in my sled to start with. I have it set up for about 9-10K. I should be able to give a detailed report on how it performs after that.
Personnally, i run at low altitude (3000ft+-500ft).
Stock low alt clutching are a pain. After i installed 48helix, stiffer primary and stiffer secondary spring it's better but it's shifted too fast again. I tried to put some shim under secondary spring to slower the shifting, it's little better but not good. I taked a STM Progressive 44/42 and it's helped ALOT my sled. I tried 19/50,20/49,21/49 gearing and at each time that i has gear up, it's worked better. I really like my 21/49 gearing, it load the engine and it feel to push harder.
After this, i put J-13 profil weight, i found that my sled run better. I has a little problem with the logical of J13 weight profile on 4 stroke and J14 profile on 2stroke, on my brain, the inverse is better.
J13 profile is like that previous cat weight, or like Poo 10series weight....![]()
J14 profile are more weight on tip