Yamaha YZ IT DZ Transmission Ball Bearing Genuine OEM
Part Number: 93306-30411-00 (also 933063041100)
Industry Code: 6304
Official Name: Bearing (B6304)
Condition: New / Genuine OEM
Placement: Internal Transmission / Gearbox / Crankcase
Industry Code: 6304
Official Name: Bearing (B6304)
Condition: New / Genuine OEM
Placement: Internal Transmission / Gearbox / Crankcase
Product Overview
This is a brand new, genuine Yamaha factory transmission bearing. As a "6304" series deep-groove radial ball bearing, it is engineered to handle high rotational speeds and significant radial loads within the gearbox. Over time, internal engine bearings can develop "pitting" on the races or excessive play in the cages, leading to transmission whine, difficult shifting, or catastrophic engine failure if the bearing disintegrates. Replacing worn bearings with genuine Yamaha parts ensures factory-spec tolerances and the smoothest possible shifting.
Why Choose Genuine Yamaha?
Internal engine components are under constant stress and heat. While generic 6304 bearings exist, Yamaha OEM bearings are sourced from top-tier Japanese manufacturers (like NTN, NSK, or KOYO) and are specifically cleared for internal oil-bath lubrication and the high-vibration environment of a 2-stroke or 4-stroke crankcase.
Major Vehicle Compatibility
This bearing is a staple of Yamaha’s mid-sized off-road and street engines from 1977 through 2025. Key fitments include:
- YZ Motocross: YZ125 (1981–2004), YZ100 (1982–1983), YZ80 (various years).
- IT Enduro Series: IT175 (1977–1983), IT200 (1984–1986), IT125 (1980–1981).
- DT Dual-Sport: DT125 (1980–2025), DT175 (1978–2002), DT100 (1977–1983).
- Vintage / Specialty: MX175 (1979–1981), TY250Z Trials (1993–1994), YT125 Tri-Moto (1980–1985).
Technical Specifications
- Dimensions: 20mm (ID) x 52mm (OD) x 15mm (Width).
- Type: Open-face (designed for internal oil-bath lubrication).
- Design: Deep groove radial ball bearing for maximum durability.
- Origin: Made in Japan.
selling as pictured.
more than welcome to pick up at shop in butler pa & save shipping.
030626 jy