TBparts Honda MSX125 Grom 186cc Big Bore Kit with Performance Camshaft TBW9150 & TBW1050

Includes Performance Camshaft


2 in stock

SKU: DS TBW9150 - TBW1050 Categories: , , Tags: , ,

Additional information

Weight 5 lbs
Dimensions 10 × 8 × 6 in



186cc Big Bore Performance Kit (64mm) with Performance Camshaft. MSX125 Grom and 2019 Monkey 125


TBW1041 – Ceramic coated all aluminum cylinder (no steel sleeve)

TBW1032 – Lightweight 64mm piston with rings, pin, & clips

TBW1027 – Head gasket kit

TBW1050 – High Performance Camshaft

Use the Camshaft with either the stock bore or our 186cc Big Bore Kit.  Similar specifications as the the DCR Cam.  As with all our cams, the quality is also exceptional and not a regrind OEM cam.

This is the biggest bore kit on the market! The all aluminum ceramic coated cylinder is lighter than a steel sleeved aluminum cylinder, reduces friction (increasing power), improves sealing, and provides better heat transfer (runs and cools down quicker). This new big bore kit will provide the extra power to make your new Grom a lot more fun to ride! High quality parts and requires no machining to the cases.

There are no installation instructions, but if you can replace your piston, you can install this bore kit as the parts are installed in the same manner as the OEM parts. However, its recommended that a professional install this kit.

*You must also use an aftermarket fuel controller to prevent a lean condition and damage to your engine.

This product is legal for closed-course competition use only; for racing vehicles (a competition vehicle not used on public highways). Intended for off-road use or race purposes; may not meet regulations of pollution controlled roads or highways. Not legal for vehicles registered and used in California.

High Profile Cycles has been an Authorized Dealer for Trail Bikes LLC (TBparts) since 2010. We have sold and installed TB products with great success.


Interested? Call, come by, or use the form below to send us a message.

Contact Preference: PhoneEmail