GY6 155cc Big Bore Cylinder Kit

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Manufacturer: MRP

Part No: 155cc Big Bore Kit

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58.5 Cylinder Big Bore Kit

Upgrade your GY6 to 155cc

The stock GY6 149cc cylinder is 57.4mm

Increases displacement to 155cc. Don't be confused by the numbers. This cylinder adds a NOTICEABLE PERFORMANCE UPGRADE! With no machining of your case. Easy to instsll

Kit Includes:

Cylinder *
Piston
Rings
Wrist Pin
Clips
Gaskets (top and bottom)
Use existing Rod

* NOTE: The 58.8mm cylinder is the largest you can go without machining the case

Fits all of the following GY6 150cc engines:

Roketa, Baja, Blade, BMS, Carter, Dazon, Hammerhead, JCL, Joyner, Kinroad, Tomberlin. Specify Engine model above.

Disclaimer: Performance Parts affect the reliability of your go kart and are designed for racing purposes only. Some machining and/or modifications may be necessary to install performance parts on your particular go kart. Manufacturers make modifications to their products from time to time and models may differ from year to year. Improper installation by an untrained mechanic can result in serious injury of death. Any damages, direct or incidental to a rider or property due to the installation of any performance parts are the responsibility of the purchaser. GokartsUSA makes no warranty as to performance parts, express or implied, including, but not limited to any implied warranties of merchantability or fitness for a particular purpose. Performance parts are not returnable for any reason. The logos and trademarks of each respective manufacturer belong to each manufacturer and they do not endorse or promote GokartsUSA in any way. GokartsUSA does not make any claim to represent or be endorsed by any of these manufacturers. All performance parts are not road legal! Closed circuit, off-road race, or exhibition use only!

Product Reviews

(2 Ratings, 2 Reviews)

Average Rating:

Al Lot More Power

A Volker (Eagle, ID) 9/30/2009 3:31 PM

Our 150 cracked some rings and started smoking badly. I installed this Big Bore kit and got yhe engine running again. The kit had everything I needed and the install went quick and smooth. What I didn't expect is all the extra power I got. 155cc did not sound like much of an upgrade, but beleive me, it is. I think a lot of the extra power comes from this piston. It increased the compression significantly. I was compelled to write this review because we have now installed this kit on our second buggy with similar results.

This is a great kit

Tom (NC) 9/1/2009 5:51 PM

I installed this kit on our Kinroad 150. It took about 2 hours. I noticed a definite improvement in power. It also has a deeper throatier sound. Highly recommended