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– Yes – more durable under heat
Silicon Nitride ceramic clutch ball
Cylinder Works Complete BIG BORE Top End Rebuild Kit
A richer fuel setting is recommended to maximize the extra displacement and keep temps down
Perfect for stock or mildly modified engines
Yamaha WR250F WR 250F Stock Size Kibblewhite Intake Exhaust Valves Seals Set Kit Grizzly 400 – Yes – more durable80 80073,80 80075,80 80077,5NL 12111 30 00,5NL 12112 30 00, 5NL 12111 30 00, 5NL 12112 30 00, 5NL 12121 10 00, 4TV 12119 00 00, 4SV 12119 00 00 Yamaha YZ250F WR250F Kibblewhite Performance Intake & Exhaust Valve Kit Complete OEM Replacement Set (2001 2013) Upgrade your Yamaha YZ250F or WR250F with the ultimate in valve performance and durability! This Kibblewhite Intake & Exhaust Valve Seals Set is the perfect OEM replacement designed to deliver