Couple quick clutch questions before I leave for the weekend...

[Waterfoul]

This was suggested by Journeyman as a possible set up for my 600XT. I can see all his points:

Yamaha uses only the YXR clutch as of now. Heelclickers are used alot for the guys that like to drag race. I have never used them, but from what I have heard they take more tuning time and it seems you have to stay on top of them more...tuning for conditions. Are you tuning the sled you have listed, the 600 XTC? If so those were clutched a bit light compared to the 600SX. Try running the SX weights with a spring around 50KG preload and around 110KG shift force, a multi helix of 47/43 works good too with around 50-60 deg. twist. Also the 600 XTC has a 1.4mm head gasket. Go with a thinner one around .6-.8mm thick and run only premo fuel. The head gasket will really wake that motor up. The stock track on that sled is not too good either. I'd look into a lighter, grippier Camoplast. Huge difference from that .75" Yoko those came with. I used to run a '97 600SX and had alot of ride time and experience with that motor package. Mine was very fast for a 600 in it's day.

My questions are:

Tighter primary spring raises engagement rpm I know... but what does it do to shifting on the fly? Like when exiting a corner? What does it to to top rpm? Top speed? I have a brand new Arctic Cat green spring at my disposal... try it out?

Secondary spring... wind it tighter... what does this do to rpm? Shifting?

As for the weights... if I add the heavier rivet to my 8cr weights I'll be at 47.9g total weight... the 8ab with the 600sx rivets would be 48.2g total weight. So I'm .3g lower... pretty close.

 

[Waterfoul]

Well now it looks like we are NOT going tomorrow... oh well... next weekend works better for me anyway. But if anyone can help with the questions above I'd appreciate it.

Mike