- Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side models
- Cylinder Head Service Kits include the below components:
- Lightweight Racing Valve Spring kits with steel or titanium retainers, beehive or dual valve springs, steel basewashers and Viton? valve stem seals
- A full set of C630 bronze high-performance valve guides for durability and heat management (standard size)
- A full top-end gasket kit including (base gasket, engine case gasket, exhaust gasket, head gasket, and other o-rings/washers depending on application)
Yamaha -- YZ 450 F -- (2016, 2015, 2014, 2017); Yamaha -- YZ 450 FX -- (2018, 2016, 2017)