SMR Factory CNC Billet Crankcase - Honda Grom/Monkey 4 Speed (2014-2020)

SMR Factory has built a reputation for uncompromising quality, and their fully CNC-machined engine cases are the pinnacle of that legacy. Carved from solid blocks of 6061-T6 aluminum, each set requires three full days of precision machining to ensure industry-leading tolerances. This intensive process doesn't just produce a beautiful finish, it guarantees the structural integrity and cooling efficiency required for elite performance.

Engineered to push boundaries, these cases allow for larger bores and extreme power levels while correcting the weak points found in OEM designs. With SMR, you can build with total confidence.

Key Features:

• Extreme Bore Compatibility: Ready for Large and Super Bore setups, accepting cylinders up to 77mm.
• Enhanced Oil Sump: Increased capacity for superior cooling and consistent oil pickup during high-G cornering and turns.
• Steel-Reinforced Main Bearings Seats: Features integrated, heat-treated steel linings for the crankshaft bearings. This reinforcement prevents housing distortion and ensures the crank remains perfectly seated under high-RPM stress.
• Heavy-Duty Starter Boss: SMR reinforced the reduction gear shaft area to handle the massive cranking loads of high-compression builds, eliminating the cracking common in factory cases.

CONTENT:

• 1x Left Engine crankcase
• 1x Right Engine crankcase