GY6 190cc ProBld Big Bore Kit

If you want to go big! Like 20hp big!, this is our 190cc ProBld Big bore package! Anytime you increase the performance you decrease the reliability. This kit is a nice little sweet spot for being super reliable and a power house at the same time.  This is a proper 190cc big bore package. You will need everything in this kit to do it right. The video mentions a 3.0mm stoker crank. CORRECTION 3.5mm Stroker crank. A few things extra you may need is a complete engine gasket kit if you don't have them already: crank seals and a engine case boring tool. I'll list those below if you need them. This is not a drop in cylinder. You will need to bore your engine cases. Linked below. Also if you do not already have a oil cooler you will need one of those as well. We recommend a 30mm carburetor (28mm if your high elevation).

Here is Everything Included:

- 63mm Cylinder

- Full gasket set (not in photo)

- Viton crank seals (not in photo)

- 63mm Pro Head with cam

- 3.5mm Stroker Crankshaft

- 2 Woodruff keys (not in photo)

- High Volume Oil Pump

- Oil Pump Chain 

 - High Torque Starter

- Heavy Duty Starter Clutch

- 92 link Timing Chain

- Low Profile Timing Chain Tensioner

- 195/205 cylinder studs

Don’t forget to add an oil cooler: CLICK HERE!
It's not a bad idea to get taller gears: CLICK HERE!
Add a CVT transmission kit: CLICK HERE!

 THIS KIT IS FOR THE GY6A ENGINE WITH 54MM STUD SPACING

GY6 Torque Settings: CLICK HERE!