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try a new cdi they go out all the time for no reason

www.power-barn.com/servlet/the-1539/Keihin-99101-dsh-116-dsh-XXX-Main-Jet/Detail

You can keep the airbox with 80cc 47mm kit, and run an 85-88 jet and stock pipe. The smaller kits work fine with stock airbox and stock pipe, the bigger 100cc 50mm kits work better with open airfilters. You will get better performance with an open airfilter on the 80cc kit with an 88 jet, the hipro pipe doesn't do much for the 47mm kits more or less just makes it louder. Use your stock head with the 80cc kit

I believe a scoot with a 39mm piston 49.5cc is dangerous you take a risk getting run over or ran off the road, my town is full of scoots so i bought one because it looked like fun. But once i got it cagers would tail me and honk and other stupid crap, so i began to mod and loved it. So now i do it as a job and for fun, my scoots aren't my main transport so i can take risks if it was my only transport i may have went with a smaller kit. Its not the size of the kit that kills the crank bearings and other stuff its the compression. A 80cc 47mm kit with stock head creates about the same amount of compression as the 100cc kit 50mm with the 50mm combustion chamber i've tested this, so either one will have around the same fail rate. So if you really want to be "safe" go with a 47mm kit with a matching 47mm combustion head.

install the kit correctly and keep up with the maintenance and ride it with a small amount of restraint and all will be good

dont touch the glass of the headlight with your hand the oils from your hands will make it burn out in like a week

i did spray it down with water before i painted it today