Who makes the best piston upgrade kit from a 50 to 80cc for my Jonway scooter?

by Al
(E. Lansing, MI.)

I wish to convert my 50cc scooter to an 80cc piston with a good upgrade kit. Who makes the best 80cc kit for my 50cc Jonway scooter?


I need to cruise at 40 mph and have the potential to reach a top speed of 50 mph. Please help, any suggestions?

Thank you,
Al

Comments for Who makes the best piston upgrade kit from a 50 to 80cc for my Jonway scooter?

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May 15, 2012
 80cc upgrade kit for 50cc jonway NEW
by: Al

I was losing compression, so I installed a quality carb from Tiawan. Still losing compression, engine would stall out. I installed new quality rings, still lost compression. Further investigation revealed a burned disfigured exhaust valve. I installed a quality metal valve. The one with the upgrade kit was made from cheap metal. Solved my problem. The carb I installed was a better carb, it has an adjustment screw. Original carb did not. I increased the mixture by a quarter of a turn, scooter runs great now. It goes 50mph, and my recent mileage results were 123 miles on a gallon of 93 octane. So with the 80cc upgrade, new carb, and better exhaust valve and I cannot forget my boot tube from boost induction systems. Scooter run fantastic, I cannot believe it. Very satisfied. My friend who is a scooter did all the work for me for $40, it took him about four hours. Of course the carb cost $30, and it is a better carb. The new piston rings cost $14. I cannot believe how fast it goes and the great mileage I am getting. This is a great true story. I like my Jonway, with disc brakes on front and rear wheels, it stops on a dime. Now I got it tweaked for my satisfaction.
May 15, 2012
 80cc upgrade kit for 50cc jonway NEW
by: Al

I was losing compression, so I installed a quality carb from Tiawan. Still losing compression, engine would stall out. I installed new quality rings, still lost compression. Further investigation revealed a burned disfigured exhaust valve. I installed a quality metal valve. The one with the upgrade kit was made from cheap metal. Solved my problem. The carb I installed was a better carb, it has an adjustment screw. Original carb did not. I increased the mixture by a quarter of a turn, scooter runs great now. It goes 50mph, and my recent mileage results were 123 miles on a gallon of 93 octane. So with the 80cc upgrade, new carb, and better exhaust valve and I cannot forget my boot tube from boost induction systems. Scooter run fantastic, I cannot believe it. Very satisfied. My friend who is a scooter did all the work for me for $40, it took him about four hours. Of course the carb cost $30, and it is a better carb. The new piston rings cost $14. I cannot believe how fast it goes and the great mileage I am getting. This is a great true story. I like my Jonway, with disc brakes on front and rear wheels, it stops on a dime. Now I got it tweaked for my satisfaction.
May 14, 2012
 50cc tao tao scooter conversion to 80cc NEW
by: nathan

i actually did the conversion to a 80cc big bore kit and my advice is to do it i spent 2 weeks work on it deff adds more speed and throttle to it and just make sure that u get average price 80cc big bore kit and if u have a friend who is handle and knows how to dismantle the engine and put all the wires together then u are set but otherwise u got go to a mechanic or scooter shop where they can install the big bore kit properly but anyways i did it by myself and spent 2 weeks working on it and my scooter sound awesome and make sure u work on the timing belt when u r install the big bore kit and put a new spakr like ngk
May 23, 2011
 big bore kit for aprillia scooters
by: Anonymous

Is the aprillia based on a GY6 50cc platform, and can an 80cc big bore kit be installed on it, like the China scooters? thank you.
May 23, 2011
 hey man
by: novi

Hey, if i read it correctly it is a basic gy6 50cc engine on it. Which is very common among Chinese scooters. now here i a like to a big bore kit that will work. now i don't know if its any good but if you do some research on google you'll probably learn more. hopefully i have given you enough information to start your search. And as always Good luck and scoot safe!

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