cheapsx
New member
All other components being left the same: will a lower rate in a primary spring allow the shift to start at a lower rpm? With less rate will it have a slower up shift and back shift too? Having said all this I am between a 35-2.25-109 and a 40-2.0-106. Seeing how the engagement on spring choice 2 is more will that eliminate any noticable difference?
daman
New member
them two are so close you wont see/notice much of a difference,i just went though this on a sled,you would need more of an extreme to see a diff.
like a 45/119 to a 35/118 is only a few 100 rpms,try it and see...
like a 45/119 to a 35/118 is only a few 100 rpms,try it and see...
cheapsx
New member
For what it's worth, I just tried both springs. The difference in my set up is the 35-2.25-109 carries less RPM at cruising speeds say 40-60 MPH. I guess I wasn't sure if rate controlled when the shift started or the speed of the shift. Of course rate may not have anything to do with my situation. The 35 start spring engages 500 RPM lower than the 40 start so maybe thats where I am seeing the difference.
daman
New member
good,i never seen much of a diff with mine.
mopar1rules
Active member
lower rate springs shift faster than higher rate springs.
Faster meaning more aggressive?? More belt grip??mopar1rules said:
Yamanewf
New member
What Mopar says. (Not opening up the discussion between rate and force definitions.) The 35-2.25-109 is a W-S-W which is stock for your sled and the only real difference between the two are engagement.(which you have seen) and the 40-2.0/106 will shift slightly faster given the same amount of flyweight in the arms. Essentially the spring with the lesser rate takes less force to be compressed and will susequently give you a lower rpm @ any given speed from your initial setup and most likely have an under rev on the top end of the speed range which you would have to adjust with either removing some weight from the tip of the flyweights or a smaller finish # on the helix.
The 35 is the preload which partially sets engagement rpm. If you go higher on preload with all things the same engagement will go up and vice versa if you go downon preload.
The 35 is the preload which partially sets engagement rpm. If you go higher on preload with all things the same engagement will go up and vice versa if you go downon preload.
mopar1rules
Active member
Sxr700Bandit said:
yes, faster as in more aggressive. i've seemed to notice higher primary temps w/springs that have 2.25kg or less rate. 2.5kg rate springs seem to work the best for me.
mopar1rules
Active member
Yamanewf said:
well said.
