I have a 98 ZR600efi, I am looking for a bit more snap out of the bottem end, I am looking to replace the spring in the primary from yellow to ???????, I thought purple but I am not sure if that is higher or lower spring lbs than the yellow one. I am willing to sacrifice top end for bottom end but not too much. So if anyone could tell me what the bst setup would be that would be great. Thanks.
This obvously wasn't the page to post on. You guys don't seem to know anything about the clutching of a sled so I won't ask anymore questions reguarding that topic. [img]images/graemlins/lame.jpg[/img]
Ok, I'm not familiar with Cat clutching, but in general if you want to boost the RPM at engagement and thus make it a bit harder hitting out of the hole then you want a spring with a stiffer initial pressure.
That said, I recommend you give someone like Black Magic a call. They will have a clutch kit tailored and tested for you sled.