Lighter springs takes away the power. I have been messing with these motors for mebbe three years now? IME. with these motors it will no longer be a 9x power motor. These motors do not generate 9 horse power right off idle. The sooner you can get into the power band ''revs'' then you shall feel the excitement and experience of a 9 hp motor.
Its like a chain saw if you put a chainsaw into a partially cut tree with out revving it first it will likely '''never ever''' get to full rev's
A clutch matched to this process is for me where the glory is.. Here is a link and a quote:
http://www.motomx.com/clutch_information.html
How the bike is presently geared. You have to treat gearing and clutch set up independently. Example: If you were to make a rear sprocket change to increase top end speed, (Less teeth on rear sprocket) then you loose some bottom end power. Now with the clutch set up you can change your power curve to compensate.
'''''ignore their washer stacks all together we use a totally different configuration in our clutches''''''
I just like the way that quote is worded!
Principals of physics still apply. The only thing I have ever got and used out of this link that has applied to me is the oil I use and my stall. I am sitting at over 5k miles on one clutch here and never did change out my washers for new ones. Been consistently changing my oil every 9 hours or so of ride time.
Our clutch and bell diameters look to be the same. Yet their washer stacks are totally alien to the stock config that came with any of my clutches. I do not recommend trying them.. My own experience at one time was disappointing. To drop stall just simply removed the flat washers systematically until the desired result is achieved.
I imagine that in major heat races it could be advantageous to change oil on occasion? As the oil's viscosity would perhaps stay more consistent in the clutches over all tuning?
Found in my experience the type oil used effects clutch performance for me substantially. Saw changes in personality from winter verses summer. I set it for a high stall then use thicker weight oil to make it engage sooner off idle. Changed and finessed the whole feel of things for me.. These clutches need a little break in time too. I use the same brand oil in the link ... 90w tho. lately this year in the summer with 10% lucas heavy duty oil stabilizer.
Good luck guy's Cheerio!
