ProX Rear Master Cylinder Rebuild Kit - ATV/Off-Road (1987-2025)
- Ships next business day
- 30-day hassle-free returns
- Call us: 541-668-7503
- Secure checkout — Pay in 4 available
Restore firm, consistent braking with the ProX rear master cylinder rebuild kit. Each kit is assembled from high-quality components that meet or exceed OEM performance, giving you a complete solution to refresh worn seals and internals for reliable lever feel and long service life.
✓ Fits:
- (rear unless noted; see notes for front where specified)
- Yamaha:
- YFM700R Raptor (2014-2025; incl. 2025 700R) - rear
- YFZ450R (2009-2025) - rear
- YFM350 Raptor (2005-2013) - rear
- YFZ450 (2004-2009 rear; 2007-2009 front noted)
- YFM250 Raptor (2008-2013 front & rear)
- XT250 (2008-2024) - rear
- YFM660R Raptor (2001-2005) - rear
- YZ85 (2002-2021) - rear
- YZ/WR 125/250/400/426/250F (select years) - rear
- TTR250 (1999-2006) - rear
- YFZ350 Banshee (1987-2006) - rear
- Kawasaki:
- KX65 / KX85 / KX100 / KX112 (2000-2025 ranges) - rear
- KX250F (2004-2021) - rear
- KX450F (2006-2021) - rear; KX450X (2021-2023) - rear
- KX250X (2022-2024) - rear
- KLX140 / L (2008-2016) - rear
- KLX250S / SF (2006-2013; 2009-2010 SF) - rear
✓ Features:
- OEM-level fit and function
- All necessary parts in one kit - no parts hunting
- Restores pressure, reduces leaks, improves pedal feel
✓ What's Included:
- Complete rear master cylinder rebuild kit (model-specific contents)
- Typical components: piston, return spring, primary/secondary seals, dust boot, circlip, washers (contents may vary by model)
✓ Specs:
- Product Type: Rebuild Kit - Master Cylinder
- Mounting Position: Rear (some models note front use; see fitment notes)
- Color/Finish: Black
- Units: Kit
- Riding Style: ATV / Off-Road / UTV / Street
- Package Weight/Size: 0.2 lb | 1.2 H × 5 L × 4.7 W in
- Part Numbers: 0617-0179, 37.910007
Ships fast from DuneGoonShop!
📦 Shipping Information
In-stock items ship next business day. ModQuad parts dispatch Monday through Thursday.
Made-to-order and custom powder coat items show their lead time at the top of this page, right next to the truck icon. These are built fresh for you, so timing varies by brand and current backlog.
Need something by a specific date? Call us at 541-668-7503 before ordering and we will check stock and ETA on that exact part. We can often point you to an in-stock alternative from another distributor.
Questions? Contact us, we respond within 24 hours.
