Clinician
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Post by jwarling on May 2, 2012 18:38:02 GMT -6
I thought I would follow up on what is happening. I did take a closer look at the new belt and the corded outside edge was not "even". Some areas were proud of the edge and about half was even with the tapered V portion. I assume the tapered part shoud make contact evenly with the entire edge. I sanded the edge of the corded outside portion so that the entire taper was evenly V-ed over the entire belt. This helped , but still seemed over geared for the power of the engine. an idea had been rattling around my skull that if the pulleys were a little futher apart on the variator the rpms would not run the belt up the pullys as quickly, increasing the rpm and before the belt got all the way out on the pully. I shimmed the end of the shaft bearing that the variator pullys ride on. This spread the pully about 1/16th of an inch. This really changed the feel of acceleration and power when accellerating at the higher end. Top speed now about 35-40 with higher rpms at the top end. Anyone think this will cause any problems to the variator? I weighed my 6 roller weights. About 50grams total. Would lighter weighs accomplish the same as the "shim" by raising the rpms before the pullys start moving?
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Post by jwarling on Apr 30, 2012 9:27:32 GMT -6
Thanks for the replies ! I had the variator apart twice, cleaned all the rollers and casting with thinner. It does not feel like the engine is reving like a slipping belt. It feels like the gearing up is higher so that the engine can not pull it at speeds above 20mph. I will try roughing up the belt and pulley and let you know the results.
Jim W.
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Post by jwarling on Apr 25, 2012 18:41:46 GMT -6
cdoublejj, Maybe thats my problem! The only plastic is the 3 "c"clips that fit the variator onto the main casting of the unit. (the weights are inside these two pieces. Are there shims that I lost or missed on the shaft of the unit. Jim W
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Clinician
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Post by jwarling on Apr 23, 2012 11:36:23 GMT -6
Allyoop, I could try changing the rpm,s, but thatstill doesn't account for the change in operation,acceleration and power after changing the belt. Could there be a degree of sizing differences in new belts even tho the numbers are the same? Will changing roller weights affect the top speed? Where is the best place to get different weights? Jim W
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Post by jwarling on Apr 23, 2012 0:33:50 GMT -6
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Clinician
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Post by jwarling on Apr 22, 2012 21:31:13 GMT -6
Thanks for the reply! Yes they all seem fine. I watched the variator and clucth with the cover off and everything seemed to move inand out normally when the revs went up and down. It appeared belt went all the way to the top edge of it's pulley when reved up. Jim W
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Post by jwarling on Apr 22, 2012 20:59:14 GMT -6
The drive belt on my roketa sicily 50cc thrashed out. I replaced it withthe proper # replacement and there was a big change in the "power". At low speed and initial acceleration it seemed normal, but at 20-25 mph it can hardly make anyincrease up hill or againest thewind. Down hill and with the wind it will get up to normal speed of 35mph. Engine seems to run fine buta loss of power at higher speeds. I thought it must be a wrong size belt and it was "over"geared, so I tried another from a name brand company. same result. The cluth and centrifical mechcanics were cleaned and checked twice.
Anyone have a suggestion?? Jim W.
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