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