GY6 QMB139 88cc NCY Big Bore Kit
$ 115.99 $ 129.99
Want a real screamer? Then this 88cc big bore kit for you, although its not a bolt on item for most QMB 139 bikes. Most of the time, engine cases must be cut. Order part number 1400-1001, Engine Bore Tool if there is no access to a machine shop. Its also recommended to get part number 1100-1239, 50mm big valve head as well, as some stock heads will not fit.
Have a look at our Decompression Tube Assembly which replaces your dipstick and allows excess crank case pressure to be released. Good idea to install one of these alongside any cylinder kit upgrade.
We now offer black, and silver adelin calipers. These fit just like rrgs/rpm style calipers.
If you just purchased all your brake goods, and need banjo bolts, we have some nice chrome bolts with two crush washers. You will need ONE of these at the...
KOSO chrome kicker
Got more of these sweet chrome/blue koso kickers in. These fit the honda aero/dio/elite spline aswell as yamaha zuma!
Zuma NCY replacement piston
Replacement piston kit for your NCY big bore kit/zuma. Complete with rings, piston, clips, and wrist pin