Rolling Wrench
GY6 205cc stroker H2O Big Bore Kit - ProBld
GY6 205cc stroker H2O Big Bore Kit - ProBld
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There it is, our PrBld 205cc water cooled 2v stroker big bore kit. This is an all-in-one top end solution. This is the largest big bore kit you can go on a GY6 A motor (54mm stud spacing qmj157). The GY6 A motor is the most common engine out of all the GY6 engines. You will be getting close to 21HP. Stock 150cc is 7…. So, ya! She’s a ripper! With it being water cooled ups the reliability in a major way! These big GY6 motors get hot quick when they are in the higher RPMs. With this being water cooled solves that. To start this kits comes with a 63mm ceramic coated cylinder with a forged 2 valve piston that has had the skirt trimmed so it plays nicely with the included 8.2mm stoker crank . It won’t hit the crank on the way down. The cylinder head is wild too! It’s unique because it comes with our J-300 cam. This cam has a decompression. This is a must for these big motors. The valves are 30.5mm intake & 26.5 exhaust. The head will come with our valve cover (no longer ProBld logo on the cover). We also include (that are a must) a 94 link timing chain, longer timing chain tensioners, a stroker timing chain tensioner, longer studs, high volume oil pump, gasket kit, crank seals, high torque starter, starter clutch and our complete water cooler kit: This includes the radiator, water pump, hoses, clamps, thermostat, fan, and radiator cap. In order to install this cylinder the engine cases will need to be bored out. We included our ProBld case cutting tool. One thing that is not in this kit, that we recommend Is an oil cooler CLICK HERE We have a step by step install video for a 190cc, but the process remains the same:
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