As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.
The CRF150F has two incompatible engine generations. The 2003–2005 kick-start model is a 157 cc engine, while the 2006–2017 electric-start model is a different 149 cc engine. This is not the liquid-cooled CRF150R motocrosser. Complete, confirmed CRF150F big-bore kits are limited, so the first tier lists those kits and the second tier identifies verified build components rather than pretending each is a complete kit.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | BBR 175cc Big Bore Kit with Cam, 411-HCF-1501 | $350–$500 | Amazon |
| 2 | BBR 195cc Big Bore Kit, 411-HCF-1901 | $230–$300 | Amazon |
| 3 | BBR 195cc Big Bore Kit with High Performance Cam, 411-HCF-1920 | $430–$480 | Amazon |
| 4 | Maxpeedingrods 200cc Big Bore Cylinder Piston Camshaft Kit, 300200011655 | $90–$150 | Amazon |
| 5 | 2012–2017 Honda CRF150F 200cc Piston Timing Chain Cylinder Kit | $120–$220 | Amazon |
| 6 | BBR 175cc Big Bore Piston Kit, 411-HCF-1505 | $155–$190 | Amazon |
| 7 | BBR 175cc Big Bore Gasket Kit, 411-HCF-1502 | $25–$40 | Amazon |
| 8 | BBR 195cc Bore Kit Replacement Piston Kit, 411-HCF-1911 | $150–$180 | Amazon |
| 9 | SXParts 68 mm Forged Piston Kit for CRF150F 208cc Big Bore | $75–$95 | Amazon |
| 10 | SXParts 70 mm Forged Piston Kit for CRF150F Big Bore | $85–$105 | Amazon |
The picks, in detail
BBR 175cc Big Bore Kit with Cam, 411-HCF-1501
Complete-kit tier: for the 2003–2005 CRF150F only. The 67 mm, 175 cc kit bores the stock cylinder and includes piston parts, BBR performance camshaft, heavy-duty valve springs and gaskets.
- 2003–2005 CRF150F only
- 175 cc
- 67 mm bore
- camshaft and HD valve springs
- stock-cylinder machining
- Complete supporting valvetrain package
- Correct for the early engine
- Requires cylinder boring by a qualified machine shop
- Does not fit 2006–2017 CRF150F
BBR 195cc Big Bore Kit, 411-HCF-1901
Complete-kit tier: new cylinder-based 195 cc kit for the 2006–2017 CRF150F only. It uses a 65 mm piston and a stated 9.8:1 compression ratio.
- 2006–2017 CRF150F only
- 195 cc
- 65 mm piston
- 9.8:1 compression
- aluminum cylinder
- Includes its own cylinder
- No stock-cylinder boring stated
- No camshaft in the base kit
- Not compatible with 2003–2005 engines
BBR 195cc Big Bore Kit with High Performance Cam, 411-HCF-1920
Complete-kit tier: the 2006–2017 BBR 195 cc package pairing the 65 mm, 9.8:1 cylinder kit with a performance camshaft.
- 2006–2017 CRF150F
- 195 cc
- 65 mm piston
- 9.8:1 compression
- performance camshaft
- One package for bore and cam work
- Uses a new cylinder
- Fueling and valve-clearance work must be set up for the finished engine
- Not an early-engine kit
Maxpeedingrods 200cc Big Bore Cylinder Piston Camshaft Kit, 300200011655
Complete-kit tier for 2006–2017 CRF150F models, with a 64.5 mm bore cylinder, piston, rings, gasket kit, camshaft kit and valve seals.
- 2006–2017 CRF150F
- 64.5 mm bore
- cylinder, piston and rings
- camshaft and gaskets
- two valve seals
- Includes cylinder and cam components
- Explicit model-year range
- Professional installation is recommended by the seller
- Check piston-to-head and valve clearances during assembly
2012–2017 Honda CRF150F 200cc Piston Timing Chain Cylinder Kit
Complete-kit tier sold for 2012–2017 CRF150F engines; it combines a big-bore cylinder, piston and timing chain. Confirm all supplied gasket and cam requirements with the seller before assembly.
- 2012–2017 CRF150F
- 200 cc stated displacement
- cylinder and piston
- timing chain included
- Late-model fitment is explicitly stated
- Timing-chain inclusion is useful during a top-end build
- Not a substitute for measuring clearances
- Does not fit the 2003–2005 engine
BBR 175cc Big Bore Piston Kit, 411-HCF-1505
Related-component tier, not a complete kit: 175 cc piston, rings and pin for the 2003–2005 CRF150F. It needs the correct 67 mm cylinder machining and separately selected gaskets.
- 2003–2005 CRF150F
- 175 cc application
- piston, rings and pin
- 67 mm bore application
- Correct early-engine replacement component
- Available with an optional gasket kit
- Not a complete big-bore kit
- Machine work is required
BBR 175cc Big Bore Gasket Kit, 411-HCF-1502
Related-component tier: gasket set for the 2003–2005 BBR 175 cc conversion, used with the early-engine piston and correctly machined cylinder.
- 2003–2005 CRF150F
- 175 cc BBR application
- head and base gaskets
- Matches the early BBR conversion
- Useful when assembling a piston-only build
- Not a cylinder or piston kit
- Does not make a stock engine 175 cc by itself
BBR 195cc Bore Kit Replacement Piston Kit, 411-HCF-1911
Related-component tier: replacement piston assembly for the BBR 195 cc conversion on 2006–2017 CRF150F engines, not a standalone cylinder kit.
- 2006–2017 CRF150F
- 195 cc BBR conversion
- replacement piston application
- Correctly specific to the BBR 195 kit
- Useful for service planning
- Requires the matching BBR cylinder
- Not for CRF150R or 2003–2005 CRF150F
SXParts 68 mm Forged Piston Kit for CRF150F 208cc Big Bore
Related-component tier: forged piston, rings, pin and clips specified for a 68 mm, 208 cc CRF150F big-bore cylinder. It is not the cylinder kit itself.
- 2006–2019 seller-stated CRF150F fitment
- 68 mm piston
- 208 cc big-bore application
- forged piston, rings, pin and clips
- Clear 68 mm/208 cc service application
- Forged piston assembly
- Requires a matching 68 mm cylinder
- Verify the cylinder-head configuration selected
SXParts 70 mm Forged Piston Kit for CRF150F Big Bore
Related-component tier: 70 mm forged piston set offered for a CRF150F big-bore build. Treat it as an engine-builder component requiring the matching cylinder and head-clearance plan.
- 2006–2019 seller-stated CRF150F fitment
- 70 mm piston option
- forged piston, rings, pin and clips
- Separate oversize option
- Complete piston hardware set
- Not a complete bore kit
- Cylinder, head clearance, jetting and tuning must be verified
Buying tips
- Identify the engine first: 2003–2005 CRF150F and 2006–2017 CRF150F parts do not interchange. Do not use CRF150R listings for this trail-bike engine.
- A piston-only early-engine conversion requires accurately boring the stock cylinder. A cylinder kit still requires correct torque, ring-gap, piston-to-cylinder, piston-to-head and valve-clearance checks.
- A displacement or cam change can require carburetor jetting and ignition/fueling setup. Follow the kit maker’s instructions and have an experienced engine technician perform machining and final tuning.
- More displacement is not universally a bolt-on gain in reliability, handling or safety. Inspect clutch, cooling, brakes and tires and use the fuel grade specified by the kit maker.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.