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Post by gsragtop on Nov 17, 2013 12:53:41 GMT -5
So I finally had some more time to play with my 50cc scooter.. It seems to run great, but with my 250 lbs body on it I can only get it to abut 20.. 25 on a long straight.. So is it my weight holding it back or the cvt?? How can I tell if its working right?? I can tell you the rear spring loaded part is very tight and needs to be "open" to fit the belt on.. So is it supposed to "close" at speed??
Thanksw
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Post by millsc on Nov 17, 2013 13:26:51 GMT -5
Try some lighter weights 4 or 5 gram preferably slider weights
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Post by ramblinman on Nov 17, 2013 17:20:49 GMT -5
if different roller weights don't help then the clutch torque spring is probably too stiff. i'm about 220 and my atm50 will go over 40.
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Post by alleyoop on Nov 17, 2013 17:42:48 GMT -5
Try lighter weights as Millsc suggest those ATM 4 stroke scoots are good for 30-35 mph.
Alleyoop
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Post by Deleted on Nov 17, 2013 17:57:14 GMT -5
Im 250 and run 5 gram sliders.
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Post by gsragtop on Nov 17, 2013 20:13:20 GMT -5
Where do I order them from???
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Post by millsc on Nov 17, 2013 20:26:09 GMT -5
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Post by onewheeldrive on Nov 17, 2013 22:34:32 GMT -5
So I finally had some more time to play with my 50cc scooter.. It seems to run great, but with my 250 lbs body on it I can only get it to abut 20.. 25 on a long straight.. So is it my weight holding it back or the cvt?? How can I tell if its working right?? I can tell you the rear spring loaded part is very tight and needs to be "open" to fit the belt on.. So is it supposed to "close" at speed?? Thanksw During acceleration, the belt rides higher in the variator (left pulley) and lower in the clutch pulley (right). It's normal to "open" the clutch pulley by hand to fit the belt deeper in there-----after you do that it gives you the slack that you need to put the belt on the variator side. Here's a perfect example of how it's supposed to act at speed: |
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Post by gsragtop on Nov 19, 2013 7:33:12 GMT -5
That was a great video!! Thanks for sharing it
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Post by Mainely Scooters on Nov 21, 2013 20:50:56 GMT -5
There is a HUGE variation in the parts that different scooter manufacturers use. Even from the same manufacturer same line same year there are differences.
Do you know how high your RPMs are going when cruising? If you are hitting 8500+ and put on lighter roller weights you won't go any faster, just accelerate faster.
Does it feel "sluggish" like it could be an engine power problem? If so you may need to tune the carburetor a bit.
Does it feel like you are hitting a "wal" at a certain speed? Then it might be a drivetrain/gearing issue. Then again it could be a carburetor tuning issue.
Its quite possible the rear torque sheave spring is a bit stiff for your setup. Typically I recommend stronger springs for better acceleration, but it depends on what the final RPMs are. If they are too high it is possible the spring is too strong and the belt is not riding to the top of the variator. In that instance we recommend heavier weights so there is more "push" against the belt overcoming the force of the stronger rear spring.
Greg
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..BAD TO THE BONE..
