Tough As Nails One Way Starter Clutch Bearing Assembly For Kawasaki Zxr250r Fx400r Model Built With Premium Forged Steel To Deliver Rock Solid Engagement And Smooth Road Ready Performance On Every Ride

Premium one way starter clutch bearing assembly for bikers
✔️ Forged steel rollers match OEM 131931002 direct replacements

This handy single replacement bearing handles the heavy spinning loads in your bike engine. You will drop it into the frame during routine garage maintenance or weekend track prep. The unit slots right into ZXR250R, ZX400, FX400R, GPZ400R, ZZR400, and Z400FII motors. You get steady startup power without guessing at alignment.

✅ Forged steel body resists harsh rotational speeds
✅ Roller layout boosts clutch engagement for quick shifts
✅ Exact OEM geometry ensures smooth road ready performance
✅ Straight swap fitment works for DIY mechanics easily

💡 Why do experienced riders upgrade their one way starter clutch assemblies often?

You want snappy throttle response that holds up week after week.

- Heat treated steel cores take abuse from daily stoplight starts

- Needle roller tracks cut down friction heat under heavy load

- Factory hole patterns slide into place without grinding

- Hardened races resist stripping torque during aggressive pulls