FINBRO Big Bore Kits & Complete Motors
for '13-'20 Honda GROM / GROM SF
Finbro Ported Head With Larger Valves
includes: 27mm / 23mm Valves (NO CAMSHAFT) Camshaft sold
Separately
Please note this head is designed to work on STOCK 125cc Motor
Any installation of this head on other model BBK will most likely
require custom modifications Sale Price - $259
Finbro 125cc Flat Top Piston -
HONDA Grom with STOCK Cylinder Sale Price - $99.95 Includes: 125cc piston,
rings, pin, clips
Dyno Chart
>>
Monkey Father Parent company to FINBRO
Key Points: - Complete CUSTOM Blue printed Big Bore Kit
- Large HP Increase
- Excellent reliability
- OEM Fit - Street or Race
-- Quality Parts
- Top Level Craftsmanship
- 3 Decades of Experience and R&D
Finbro Big Bore
Performance Kit Bolt on 90-110% more power! Take your GROM from Stock 8HP to over 18 HP with this easy to install
bolt on 183cc Big Bore kits.
This complete Big Bore Kit
Includes: - 183cc Big Bore cylinder
- UPGRADED JE FORGED Alum. 183cc High
Compression Piston ,
Piston Rings, pin, clips and gasket kit
- New Complete Head, with Oversized Ports
- New Oversized Valves 31mm / 26mm
- New Higher Flow PCX150 Fuel Injector
- New GEN2 High Performance Camshaft
- New Overbored Inlet
- New Overbored Throttle Body
- New Overbored Insulator
- New Stiffer Clutch Springs
Note: OUR Finbro 183cc BBK is unlike any other
on the market.
Our FInbro 183cc BBK comes with OUR Custom made JE Forged Alum.
Piston
Our GEN2 Camshaft
We personally BLUE PRINT Each Cylinder with each Piston, One at a
time.
We Gap the rings, Specific to each individual cylinder.
We install the rings on the piston.
We properly clock them.
We then install the piston in the cylinder, so it's ready to go.
VERY IMPORTANT: ALL Big Bore Kits requires an Aftermarket
Fuel Controller and A/F Monitor (not included)
We highly recommend the Dyno Jet PCV, and WBC2 for proper control of the Fuel,
maximum performance, and Longevity. ALL Ignition Advance Must be removed from the bike,
Prior to running a BBK, or Detonation will occur.
Please see the Video's below for COMPLETE Details on each piece of the kit, how
it works, what it does, and installation proecedure
FINBRO
235cc BBK Complete Motor Includes
Finbro ECM and Finbro 31mm Throttle Body
Built and tested in the Finbro Factory, and shipped Direct to your door.
FINBRO 204cc Complete Motor
FINBRO
204cc BBK Complete Motor w/ 4 Valve HEAD
Includes
Finbro ECM and Finbro 34mm Throttle Body
Built and tested in the Finbro Factory, and shipped Direct to your door.
