J. Costa Variator

MikeH · Subject: Reducing CVT noise Fri Jul 03, 2009 7:26 am

[quote="Bernardo"][quote="mr fish"]Im getting jelous now (need upgrades) cant stand the belt slap and vibrations any longer its driving me mad Mad

John, there are a couple of things that have reduced belt slap for me. First - a couple of years ago on the yahoo forum, Whit mentioned that he sprayed some belt dressing on the dive belt and it made everything run smoother and quieter. I tried it, and got the same results. Just remove the CVT cover and spray some belt dressing on the inside of the belt while you are gently giving it some throttle. After I did this, acceleration was much smoother and much quieter. However, the result was fairly short lived and the noise and shudder during acceleration returned after a couple thousand miles.

I also noticed that doing the brake torque to eliminate clutch squeal also reduced overall CVT noise. I'm not exactly sure why this happens, since the brake torque technique is designed to remove glaze from the clutch shoes, but it does seem to help with belt noise, slap, and vibration as well.

I have since noticed that I can accomplish the same effect by simply doing a series of WOT starts in quick succession. Simply find an empty parking lot or road. Stop, do a wide open throttle start, stop as soon as you get up to 25 mph, do another WOT start and repeat this about 5 or 6 times. This helps to reduce CVT noise. It doesn't completely eliminate belt slap, but it does seem to reduce it and also result in a smoother acceleration. When the CVT noise returns.....which it will, I simply repeat the WOT starts again.

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Mike H

For some people there is therapy. The rest of us have motorcycles.

Bernardo · Subject: Re: J. Costa Variator Fri Jul 03, 2009 8:33 am

mr fish wrote:

I feel i need to sweet talk the wife again for the j costa, as for the accident internal bruising hurt like hell but did it all again a week later on the insurance companys bike wrote that off as well they thought i had broken my neck with that one ,9 hours on a spine board about 15 xrays just to find out im a proffesional bouncer lol (witnesses said the the hight and flip was amazing and said i should take up gymnastics)so i learnt my lesson and bought a 1200 bandit had it tuned to about 140bhp then realised i have a family so sold that bought a gilera 180sp, and guess what......... wrote that off in the side of a van Laughing

( signaled left but turned right) and they say bikes are dangerous yet i never seem to hit another bike its vans and cars that hurt, touch wood since then ive been learning how to ride to my ability and bikes ability

Aha! That need for speed demon...... ! At least you are still here to tell the tale and are happy with the S'wing... (and honest!) The speed demon thing was one of the reasons that when I bought my bike recently, that I went for the Divvy 900..... In default mode one tends to just pootle along rather than giving it some.... And although by bike standards its slow, its plenty fast enough in the real world, and good torque.... Problem is there is always something better.... sigh! In some ways perhaps its a good thing that it can be expensive to keep on buying stuff for ones bike / scoot..... It keeps you grounded and in the real world!

And then again Woah....! You tuned a bandit to 140 bhp? That's on a par with a fazer 1000 Please do tell how!!

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Happy Riding! Best wishes, Bernardo

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