Yamaha YZ450F Parts and Accessories
This page is dedicated to YZ450F Parts and Accessories. If you are looking for performance you have come to the right place! We carry pistons, valves, fuel controllers, intake kits, clutches, and so much more. We also specialize in many performance modifications and services. We offer porting, 3 or 5 angle valve jobs, dyno tuning, and even complete motor building services. So if you dont see it here then give us a call or email us.
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| YZ450F Head Porting – CT Racing has done significant amounts of flow bench and dyno testing to offer you the best port layout for your YZ450F. We highly recommend getting a valve job at the same time the head is being ported. Our CNC valve job ties in with the port work to offer extremely effective flow numbers. | $350.00 |  |
| YZ450F 3 Angle Valve Job – Quality valve job. | $144.00 |  |
| YZ450F 5 Angle Radius Race Valve Job – The 5 angle radius Race valve job significantly raises the flow characteristics at low valve lift and definitely shows a horsepower increase throughout the useable power curve. | $192.00 |
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| YZ450F 5 Angle Radius Race Valve Job for +1mm Exhaust Valves – The 5 angle radius Race valve job significantly raises the flow characteristics at low valve lift and definitely shows a horsepower increase throughout the useable power curve. The 5 angle valve job really shines on big valves as the seat diameter is opened up all the way into the aluminum casting, blending to the port work. Adding +1mm valves to a modified engine package helps the mid to top-end horsepower. Most aftermarket hi compression pistons are clearanced for +1mm valves. | $216.00 |  |
| YZ450F 5 Angle Radius Race Valve Job for +1 or +2mm Intake & Exhaust Valves – The 5 angle radius Race valve job significantly raises the flow characteristics at low valve lift and definitely shows a horsepower increase throughout the useable power curve. The 5 angle valve job really shines on big valves as the seat diameter is opened up all the way into the aluminum casting, blending to the port work. Adding +1 or +2mm valves to a modified engine package helps the mid to top-end horsepower. Most aftermarket hi compression pistons are clearanced for the bigger valves. | $240.00 | |
| Split 4 Stroke Cases, Inspect Crank & Trans, & Reassemble | $475.00 | |
| Disassemble & Reassemble 4 Stroke Top-end (from bottom-end only) | $250.00 | |
| Disassemble Head, Clean Ports, Prep, & Reassemble | $75.00 | |
| Rebuild 4 Stroke Crankshaft (labor only) | $100.00 | |
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| ’03-’04 YZ450F / WR450F JE Hi Performance Piston Kit 95mm – Available in 12.5:1 and 13.5:1 Comp Ratios. |  |
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| ’03-’04 YZ450F / W450F JE Hi Performance Piston Kit 98mm Big Bore 478cc – Available in 12.5:1 Comp Ratio. | |
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| ’05-’09 YZ450F / ’05-’13 WR450F JE Hi Performance Piston Kit 95mm – Available in 12.8:1 and 13.5:1 Comp Ratios. | |
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| ’05-’09 YZ450F / ’05-’13 WR450F JE Hi Performance Piston Kit 97mm Big Bore 468cc – Available in 13:1 Comp Ratio. | |
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| ’05-’09 YZ450F / ’05-’13 WR450F JE Hi Performance Piston Kit 98mm Big Bore 478cc – Available in 13:1 Comp Ratio. | |
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| ’05-’09 YZ450F / ’05-’13 WR450F JE Hi Performance Piston Kit 100mm Big Bore 498cc – Available in 12.5:1 Comp Ratio. | |
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| ’10-’13 YZ450F JE Hi Performance Piston Kit 97mm – Available in 12.8:1, 13.5:1, and 14:1 Comp Ratios. | |
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| ’14 YZ450F JE Hi Performance Piston Kit 97mm – Available in 12.8:1, 13.5:1, and 14:1 Comp Ratios. | |
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| ’03-’09 YZ450F / ’05-’13 WR450F Vertex Hi Performance Piston Kit 95mm – Available in 12.5:1 and 13.5:1 Comp Ratios. | $189.38 |
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| ’03-’09 YZ450F / ’05-’13 WR450F Vertex Hi Performance Piston Kit 97mm Big Bore 468cc – Available in 12.3:1 Comp Ratio. | $198.39 |
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| ’03-’09 YZ450F / ’05-’13 WR450F Vertex Hi Performance Piston Kit 98mm Big Bore 478cc – Available in 12.5:1 Comp Ratios. | $189.38 |
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| ’10-’13 YZ450F Vertex Hi Performance Piston Kit 97mm – Available in 12.5:1 and 13.5:1 Comp Ratios. | $180.36 |
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| ’10-’13 YZ450F Vertex Hi Performance Piston Kit 99mm Big Bore 468cc – Available in 12.5:1 Comp Ratio. | $194.69 |
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| ’14 YZ450F Vertex Hi Performance Piston Kit 97mm – Available in 12.5:1, 13.5:1 and 13.7:1 Comp Ratios. | $180.36 |
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| YZ450F Cometic Top-end Gasket Set – Select model and bore size. Available in 95mm, 96mm, 97mm, 98mm, 99mm, and 100mm | |
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| YZ450F Crank Works Pro Rod Connecting Rods – Select make and model. Available in stock stroke. | $245.00 |
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| Hot Rods Connecting Rod – Select make and model. Available in stock stroke. | |
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| ’03-’05 YZ450F Hot Rods Heavy Duty Crank – Available in Stock Stroke. Main bearings not included. | |
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| ’06-’09 YZ450F Hot Rods Heavy Duty Crank – Available in Stock Stroke or +3mm Stroker. Main bearings not included. | |
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| ’10-’15 YZ450F Hot Rods Heavy Duty Crank – Available in Stock Stroke. Main bearings not included. | |
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| ’03-’05 YZ450F Hot Rods Heavy Duty Complete Bottom End Kit – Available in Stock Stroke. This kit includes main bearings, seals, gaskets, and crank. | |
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| ’06-’09 YZ450F Hot Rods Heavy Duty Complete Bottom End Kit – Available in Stock Stroke or +3mm Stroker. This kit includes main bearings, seals, gaskets, and crank. | |
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| ’10-’13 YZ450F Hot Rods Heavy Duty Complete Bottom End Kit – Available in Stock Stroke. This kit includes main bearings, seals, gaskets, and crank. | |
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| ’03-’09 YZ450F / ’03-’09 WR450F Hot Cam Intake Camshaft – Available in Stage 1 and Stage 2. | |
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| ’03-’09 YZ450F / ’03-’09 WR450F Hot Cam Exhaust Camshaft – Available in Stage 1 and Stage 2. | |
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| ’10-’13 YZ450F Hot Cam Intake Camshaft – Available in Stage 1 and Stage 2. | |
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| ’10-’13 YZ450F Hot Cam Exhaust Camshaft – Available in Stage 1 and Stage 2. | |
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| ’14-’15 YZ450F Hot Cam Intake Camshaft – Available in Stage 1 and Stage 2. | |
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| ’14-’15 YZ450F Hot Cam Exhaust Camshaft – Available in Stage 1 and Stage 2. | |
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| YZ450F Del West Titanium Intake Valves – Available in Standard, +1mm or +2mm Oversized. | |
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| YZ450F Del West Titanium Exhaust Valves – Available in Standard, +1mm or +2mm Oversized. | |
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| ’03-’09 YZ450F CV4 Hi Performance Racing Valve Spring Kit – This Kit comes COMPLETE with both Intake and Exhaust Springs. Must run CV4 Valve Spring Seats below. | |
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| ’03-’09 YZ450F CV4 Valve Spring Washer Kit | $56.95 |
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| Hinson Racing Clutch Kit – Includes Fibers, Steels, & Springs | |
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| Fasst 1-1/8″ Flexx Bars – These are the best off road bars money can buy. Bars come with three different elastomers to get the proper cushioning for your type of riding along with a cross bar pad in your color choice of blue, grey, or red. Please Note: 1-1/8″ bar mount kit is required. |
$359.95 |
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| Streamline Reflex Pro Pack with Clutch and Brake Lever – Available in Black, Blue, Red, and Orange. | |
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