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CVT rpm
May 12, 2012 22:20:29 GMT -5
Post by stevo52 on May 12, 2012 22:20:29 GMT -5
Maybe this is normal but I'd really like my CVT to stay at a more steady rpm. My CVT setup is a malossi variator with yellow (1500rpm) pulley and clutch springs. 3.9 gr malossi rollers. At WOT takeoff the rpms shoot to about 10.5k for a second then steadily fall to about 8k at 30-35 mph. Then the revs pick up again to a top speed of 9.5k rpm about 50mph.
So what happens is a great launch then the power goes flat in the mid range 25-35mph. Is this normal? Any idea what I could change? Power peak seems to be 9-9.5k range. I'd be nice to say in that range maybe not possble?
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byte
Scoot Member
Posts: 51
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CVT rpm
May 13, 2012 6:12:37 GMT -5
Post by byte on May 13, 2012 6:12:37 GMT -5
What kind of torque drive are you using? If it is the stock one, that's normal.
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CVT rpm
May 13, 2012 6:23:35 GMT -5
Post by 90GTVert on May 13, 2012 6:23:35 GMT -5
It's the way the stock torque driver works. The idea is to get good takeoff and then let the revs settle for cruising. Great for most street scoots, not so great when you really start tuning or just want max performance. Pics and more description of stock and aftermarket TDs below. Let this link load for a few seconds and it will take you to the right post. 49ccscoot.proboards.com/index.cgi?action=display&board=yamajog&thread=1712&page=2#28759 |
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CVT rpm
May 13, 2012 7:34:33 GMT -5
Post by stevo52 on May 13, 2012 7:34:33 GMT -5
My torque driver is indeed stock. Did not know that is how it functions, thanks for the info! This could be a future mod. I might first spend the money on more jets for the arreche carb to get that from running super rich and fouling my plugs. It was interesting to note that with the 19mm the "flatness" in power was less noticeable.
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