I have srv 540 and the yamah clutch was shot and parts little bushings seem unavailable so i swapped on a comet 102. ive got a new purple spring and i believe 43.5 gram weights. pulls really good for a short time them seems like it doesnt shift out fast enough, then starts to pull better around 40mph or so. was thinking heavier weights to get more shift out. any clutch gurus out there with advice? thanks