Yamaha YXZ

AR8695 - Yamaha YXZ/Sidewinder / Textron XX (16-up) ARP2000 Head Stud Kit

Made from ARP2000 material and rated to 220,000 psi, ARP cylinder head studs not only offer super...

Made from ARP2000 material and rated to 220,000 psi, ARP cylinder head studs not only offer superior clamp loads over cylinder head bolts, they provide proper alignment of the head and gasket with more accurate and consistent torque loading. Bolts will actually twist while torquing to proper spec, greatly reducing their ability to hold true.

AR8795 - Yamaha YXZ (16-up) ARP2000 Case Main Stud Kit

Does not require lineboring your crankcase. Made from ARP2000 material and rated to 220,000 psi, ...

Does not require lineboring your crankcase. Made from ARP2000 material and rated to 220,000 psi, ARP case studs not only offer superior clamp loads over factory torque to yield bolts, they provide more accurate and consistent torque loading. Bolts will actually twist while torquing to proper spec, greatly reducing their ability to hold true.

BC0950B - Yamaha 998 Dual Spring/Steel Retainer/Seat Kit

Kit is intended for shim in aftermarket bucket setup. Designed for high rpm, BC valve springs by ...

Kit is intended for shim in aftermarket bucket setup. Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. BC retainers are machined from premium 4140 chromoly steel for the ultimate in reliability. Also includes steel valve spring seats. Type BC1950 Dual Free Length 1.572" Outer/1.339" Inner Seat 1.265" @ 76 lbs Open 0.850" @ 192 lbs Co...

BC0952 - Yamaha YXZ / 998 (16-up) Stage 3 Viper+ Spec Camshafts

Added duration, lift and faster opening ramp speeds than the OEM Viper cam specs. Requires ECU tu...

Added duration, lift and faster opening ramp speeds than the OEM Viper cam specs. Requires ECU tuning and other mods to benefit performance. Requires BC0950B (shim in bucket). Yamaha OE Viper Spec: 240°/232° @ .050” / .372”/.353” Lift Adv Dur (.020") 266°/260° Dur @ .050 254°/244° Valve Lift (1:1) .387"/.380" Valve Lift (mm) 9.83/9.65

BC0954 - YAMAHA YXZ/SIDEWINDER (16-up) STOCK STROKE KIT w/BC PRO625+ RODS, SHELF PISTONS w...

Includes 4340 billet crank, 66.2mm stock stroke, ProH625+ rods (19mm Pin), and Shelf CP pistons (...

Includes 4340 billet crank, 66.2mm stock stroke, ProH625+ rods (19mm Pin), and Shelf CP pistons (choice of bore/compression). REQUIRES SIDEWINDER OIL PUMP/SPROCKET (BC8805). These cranks are fully system balanced to the following bobweight: • BC Rod (BC6952 w/19mm Pin): 440g • CP Piston (80mm bore): 272g • CP Pin (19mm OD, .220” wall: 85g • CP Ring Pack: 17g • ACL Bearings: 24g • CP Locks: 4g Crank # BC5950 - 66.2mm (4340 billet) Rod # BC6952 - w/19mm Pin and 625+ Bolts Piston # BC79...

BC0956 - - YAMAHA YXZ/SIDEWINDER (16-up) STOCK STROKE KIT w/CARRILLO RODS, SHELF PISTONS ...

Includes 4340 billet crank, 66.2mm stock stroke, Carrillo rods (19mm Pin), and Shelf CP pistons (...

Includes 4340 billet crank, 66.2mm stock stroke, Carrillo rods (19mm Pin), and Shelf CP pistons (choice of bore/compression). REQUIRES SIDEWINDER OIL PUMP/SPROCKET (BC8805). These cranks are fully system balanced to the following bobweight: • Carrillo Pro-H Rod: 440g • CP Piston (80mm bore): 272g • CP Pin (19mm OD, .220” wall: 85g • CP Ring Pack: 17g • ACL Bearings: 24g • CP Locks: 4g Crank # BC5950 - 66.2mm (4340 billet) Rod # CA6952 - Carrillo w/19mm Pin and Carr Bolts Piston # BC...

BC0958-20 - YAMAHA YXZ/SIDEWINDER (16-up) STROKER KIT w/BC PRO625+ RODS, CUSTOM PISTONS w/...

Includes 4340 billet crank, 71mm stroke, ProH625+ rods (20mm Pin), and custom pistons (choice of ...

Includes 4340 billet crank, 71mm stroke, ProH625+ rods (20mm Pin), and custom pistons (choice of bore/compression). These cranks are fully system balanced to the following bobweight: • BC Rod (BC6953 w/20mm Pin): 440g • CP Piston (80mm bore): 272g • CP Pin (19mm OD, .220” wall: 85g • CP Ring Pack: 17g • ACL Bearings: 24g • CP Locks: 4g Crank # BC5951 - 71mm (4340 billet) Rod # BC6952 - w/20mm Pin and 625+ Bolts Piston # BC7951 - Custom (specify bore and compression)    

BC0959 - YAMAHA YXZ/SIDEWINDER (16-up) STROKER KIT w/BC MOAR RODS, CUSTOM PISTONS w/ALL HA...

Includes 4340 billet crank, 71mm stroke, MOAR rods (21mm Pin), and custom pistons (choice of bore...

Includes 4340 billet crank, 71mm stroke, MOAR rods (21mm Pin), and custom pistons (choice of bore/compression). These cranks are fully system balanced to the following bobweight: • BC Rod (BC6953 w/20mm Pin): 440g • CP Piston (80mm bore): 272g • CP Pin (19mm OD, .220” wall: 85g • CP Ring Pack: 17g • ACL Bearings: 24g • CP Locks: 4g Crank # BC5951 - 71mm (4340 billet) Rod # BC6953 - w/21mm Pin and 625+ Bolts Piston # BC7951 - Custom (specify bore and compression)  

BC3850 - Yamaha YXZ / Textron XX Stainless Steel Intake Valves - 31mm (STD) - set/6

BC valves are one piece design with a friction welded Stellite tip for the best possible performa...

BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finis...

BC3853N - Yamaha YXZ / Textron XX Inconel Exhaust Valves - 27mm (+1mm) - set/6

BC valves are one piece design with a friction welded Stellite tip for the best possible performa...

BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, extreme heat resistant Inconel NCF751 alloy or Inconel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and feature...

BC3995 - Yamaha YXZ / 998 Valve Stem Seals for Stock or Aftermarket Valve Guides

BC valve stem seals are designed for stock or aftermarket valve guides (BC3967). These Viton seal...

BC valve stem seals are designed for stock or aftermarket valve guides (BC3967). These Viton seals allow a carefully defined amount of engine oil from the cylinder head into the combustion chamber—to lubricate the rotating valve stem in the valve guide. BC valve stem seals are produced from high performance materials for increased part life and lower wear. Set/12

BC4905HX - Yamaha YXZ / 998 Rod Bearings (Yellow Stock Replacement) set/6

  BC Exclusive Yamaha 998 Rod Bearings by ACL - Yellow New ACL Race Series HX rod bearings (e...

  BC Exclusive Yamaha 998 Rod Bearings by ACL - Yellow New ACL Race Series HX rod bearings (extra .001" clearance) for the Yamaha 998 engine (YXZ, SideWinder, Viper, Nytro, Vector, Venture, Viking, VKPro, WaveRunner V1, VK, VX, EX, FJR1300, Rage, Wolverine) are available exclusively through BC. These are equivalent to Yamaha Yellow (5JW-11656-40-00) in terms of sizing and fit just about every model that utilizes the 998 Genesis world platform engine. ACL Race Series performance engine bea...

BC5951 - YAMAHA YXZ/SIDEWINDER (16-up) BILLET CRANKSHAFT (71mm STROKE)

These cranks are precision balanced if ordered as a BC stroker kit, bobweights required if using...

These cranks are precision balanced if ordered as a BC stroker kit, bobweights required if using own piston and/or rod combo. 4340 billet crankshaft in +4.8mm stroke (71mm). NOW MUST USE WITH  YXZ OIL PUMP SPROCKET. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights are designed for reduced windage through the crankcase creating less oil resistance for better rpm potential. These c...

BC6953T Yamaha YXZ Titanium Connecting Rods w/ARP625+ Fasteners

Get them before Tech changes the rule book! Titanium rods for the YXZ designed for high rpm short...

Get them before Tech changes the rule book! Titanium rods for the YXZ designed for high rpm short course racing, delivers instant throttle response in and out of the corners and a lighter rotating mass for acceleration down the straights. Features ARP CustomAge 625+ fasteners for peace of mind above 11,000 rpm. C-to-C 4.665" BE Bore 1.6142" BE Width 0.887" PE Bore 0.748" PE Width 0.800" Gram Wt 325 Torque Specs 33-35 ft lbs - 5/16"

BC8885 - Yamaha YXZ (16-up) Cam Bucket Followers

Shim in bucket design, requires BC spring/retainer kit BC0950B. Made from aerospace grade, 4140 c...

Shim in bucket design, requires BC spring/retainer kit BC0950B. Made from aerospace grade, 4140 chromoly steel alloy and completely CNC machined from heat-treated billet round bar. Heavy-duty wall thickness eliminates distortion and cam face depression, while reducing overall weight from non-critical stress areas. Nitrided and polished to a surface hardness of 60RC for minimal wear. Provides lower friction with cam lobes and cylinder head lifter bores for improved durability.