Variator/clutchspring question  By  skootn4fun (Read 1,726 times)

Inside the clutch assembly, where the 3 springs are located?

the thing to remember is, adjusting the clutch/ contra spring will not give you more power, but it does alter the torque curve for your riding style.

the trick is to have these balanced so you accelerate at max torque on the RPM curve, this will be the typical max HP range.
this can only be achieved by trial and error.
install the contra spring, then adjust the rollers for the desired rpm.

things to remember:
If your roller weights are giving you good acceleration, and a good top end, but when you approach a small hill the scooter slows drastically, this may be caused by having too light of a contra spring.

Also if you are running good at say 50MPH, and you slow down to say 35MPH. If you try to accelerate, and you have hardly any acceleration, this can also be caused by having too light of a contra spring.

On the other hand, if your spring is too strong, then the roller weights may not be heavy enough to force the belt out all the way and into it's highest gear ratio.

If you go with a heavier contra spring, you may need to go to a slightly higher roller weight. Likewise, if you go to a lower spring, you may need to go to a lighter weight.

like i said earlier, this is a trial and error process.

here is a chart of roller weights for the 244cc.
all of the figures in this chart will no doubt be wrong for your ride, but the general trend should be clear.
my ride came with 15 grams rollers (6) and i swapped them out for 20 gram rollers.
this not only gave me a higher top end, but it also gave me more high end torque, i could easily pass someone when they were doing 55.
fc.greensboroday.org/~epaynter/brcvt

okay, for some reason i can't seem to post links.
i'm working on it.
okay, selecting the entire url and dropping it into your search box will bring up the page.
this seems to be a scripting issue.

fc.greensboroday.org/~epaynter/brcvt


I just put the link in again and it worked perfectly? What browser are you using? For some reason your link have [a][/a] tags around it?

JR

the above seems to work.
this time i'll open another session and search for something:
www.biography.com/people/dale-earnhardt-9542044

Do not tune the CVT so the rpms pass redline !! These engines redline at 8k and are known to cook themselves. Your power band is closer to 7500 rpms on a stock engine . if you can reach 7500 rpms on a straight run your pretty much set. I consider myself an expert when it comes to tuning these cvts. I've posted vids of my blue beast running at 67mph on straight runs and 76 mph down medium hills , and I still never exceeded 8k rpm. And yes that's GPS mph . my takeoff rpms usually would rise to around 7k , hen slightly drop off while the mph climbs. Eventally the rpms rise again and top out near 7500 rpms on a straight run and around 8k down hill. I would never have my takeoff rpms reach 8k or over , however 8200 rpms down hill will not hurt anything, but if your able to hit 8200 rpms on a straight run , then your gonna be near 9k down hill !! Which is never good for a stock setup .