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Joined: Aug 11, 2014 21:33:43 GMT -5
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Post by spazb0i on Aug 11, 2014 21:37:10 GMT -5
I have a Chinese made TaoTao 50cc which I've been trying to beef up. I've made some heavy modifications, but I'm not getting the performance I want. This is a list of what I've changed. - 100cc big bore kit
- Big bore cylinder head
- Upgraded CDI timer
- Upgraded timing chain
- Performance clutch
- Performance ignition coil
- Improved spark plug w/ a hotter load
- Performance exhaust
- I know the previous owner did modify the roller weights, but I'm not
positive on those - And a bigger jet on the carburetor
When I first got it I struggled to reach 30mph; now it has significantly increased acceleration, but I top out between 35 and 40mph. Any suggestions on what to change or add? |
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Post by wheelbender6 on Aug 20, 2014 20:45:23 GMT -5
Have you done the derestriction on the CVT? There is a ring you can remove from one of the pulleys that gives you more top speed. I would think that a 100cc engine should top out close to 50mph.
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Post by carasdad on Aug 20, 2014 22:13:47 GMT -5
Yes.. Your gears in the transmission. This a VERY common thing folks do when they have more displacement. Remember your scooter is designed for a 50cc engine..so you can only go as fast as the transmission gears allow. Example...you can put a turbo charger on a John Deere lawn tractor and gain an extra 20 or so horespower...but yer still only going to go about 12-15mph top. See what I am getting at? That 100cc BBK is bad news though..I have installed 9 for customers that demanded them against everyones advice but... Your crank bearings will most likely be shot at about 1,000 miles. At my shop I have yet to see one come in that didn't. The 50mm..51.5mm and 52mm pistons weigh TWICE what the stock 39mm does..and the crankshaft counterweights are not balanced for that extra weight. Reason why folks with those super huge BBK's feel more vibration from their engine. Plain and simple the rotating weights of the crankshaft are not heavy enough to offset the reciprocating (up and down) weight of the piston. This causes the engine to rotate as unbalanced... as a cheap $20.00 Ceiling Fan does..  Enjoy the very few miles you will get out of the engine if you go the 100cc route..hope it is fun while it lasts...  Glenn p.s. But as I said..yes you have more power..but you need to install a higher gear ratio in the tranny. Easy and not expensive job to do..other wise your are riding around like a car stuck in 1st gear... Here is a link to a gear set... www.ebay.com/itm/281284682913?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT |
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