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Author Topic: Big bore 100cc  (Read 702 times)

3Dragons

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Big bore 100cc
« on: July 15, 2017, 03:14:34 AM »
I have a super 8 50cc 4t I can only get 37mph out of it so I bought a 80cc big bore kit and top speed was still the same 37 mph so I bought a 100cc big bore kit same result 37mph so I bought a bigger carb no change!
I have double check triple check timing valve setting change the CDI still the same I checked the clutch all good there.
Does anyone have any idea what I can do or to look for I really what this to go 50mph
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tortoise

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Re: Big bore 100cc
« Reply #1 on: July 15, 2017, 02:42:03 PM »
BBK's provide more torque (up hills and into headwinds), but do not change the drive pulley ratios . . original crankshaft RPM still equals original final drive gear RPM.

Accept that you may have been influenced by "irrational exuberance" . . and replace with at least a 125cc scooter!
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