BOLD MAGENTA part numbers are new for 2025 ENGINE PARTS-UNLIMITED.COM OFFROAD | 2025 ENGINE 1233 DISCLAIMER: *EMIS (EMISSIONS CATEGORIZATION CODE). SEE PAGES 4-6 FOR CATEGORY CODES, IMPORTANT EPA/CARB EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND NOTICE REGARDING NOISE REGULATIONS. PRODUCTS NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES IF NOT CATEGORIZED AS “1” OR “4”. SPRING BUCKETS •Built using the same technology as the CV4 Formula 1 buckets •Made with proprietary steel for the lightest and strongest part possible •Diamond-like-Carbon (DLC) coating substantially reduces friction and decreases valvetrain wear •Increases rpm and horsepower • Increases cylinder head life by having tighter tolerances for less “rock” in the cylinder head •Perfect for high-lift camshafts FITS MODEL VALVE TYPE PART # HONDA CRF450R 02-16 Intake 0926-0623 FITS MODEL VALVE TYPE PART # HONDA (CONT) CRF450X 05-17 Intake 0926-0623 HOT CAMS (CONT) FITS MODEL DESCRIPTION INTAKE LIFT INTAKE DURATION (@ 1 MM) EXHAUST LIFT EXHAUST DURATION (@ 1 MM) PART # YAMAHA (cont) YZ250F 19-20 (stage 1 and 2) Exhaust.Works with both intake stage 1 and stage 2 intake cams. Designed with Improved Throttle Response (ITR) technology. Uses stock valve springs. Dual-cam engine. Intake and exhaust cams sold separately: Supplied with decompression mechanism. - - 9.398 mm 249.8 0925-1600 WR/YZ400F/426F 98-00 Intake. Excellent mid-range and top-end power increase when installed at factory-preset 105 degrees. Uses stock valve springs. Works best with 95 mm bore (426cc) or larger. 8.8 mm 260 - - YZ426S1-AI Exhaust. Excellent mid-range and top-end power increase when installed at factory-preset 105 degrees. Centerline (factory setting). Uses stock valve springs. Works best with 95 mm bore (426cc) or larger. Includes auto-decompressor. - - 8.76 mm 259 0925-0033 WR450F 03-15 (stage 1) Intake. Excellent mid-range and top-end power increase. Uses stock valve springs. 8.86 mm 269 - - 0925-0034 Exhaust. Excellent mid-range and top-end power increase. Uses stock valve springs. Includes auto decompressor. - - 8.67 mm 265 0925-0062 WR450F 16-18 (stage 2) Intake. Slight bottom end gain to 4,800 rpm and good gains from 6,500 rpm to redline. Uses stock valve springs. Dual-cam engine. Intake and exhaust cams sold separately. 10.795 mm 262.55 - - 0925-1595 Exhaust. Slight bottom end gain to 4,800 rpm and good gains from 6,500 rpm to redline. Designed with Improved Throttle Response (ITR) technology. Uses stock valve springs. Dual-cam engine. Intake and exhaust cams sold separately. Supplied with decompression mechanism. - - 10.16 mm 260.39 0925-1596 YZ450F 03-09 (stage 1) Intake. Excellent mid-range and top-end power increase. Uses stock valve springs. 8.86 mm 269 - - 0925-0034 Exhaust. Excellent mid-range and top-end power increase. Uses stock valve springs. Includes auto-decompressor. - - 8.67 mm 265 0925-0035 YZ450F 03-09 (stage 2) Intake. Uses stock valve springs. 8.89 mm 260 - - 0925-0276 Exhaust. Uses stock auto-decompression mechanism. Uses stock valve springs. - - 8.7 mm 254 0925-0277 YZ450F 10-13 (stage 1) Exhaust.THIS IS THE CAM SET THAT WILL SUIT MOST RIDERS IN MOST RIDING SITUATIONS. PART #s 0925-0567 (sold separately) and 0925-0568 when used as a set provide increased low-mid rpm torque up to 9,000 rpm and improved peak torque with no loss at high rpm.Throttle response is also improved. FI remapping is not required but may further improve overall performance. Supplied with decompression mechanism. - - 8.64 mm 249 0925-0568 YZ450F 10-13 (stage 2) Intake. PART #s 0925-0569 and 0925-0570 when used as a set provide increased mid-top torque and horsepower. Produces more power than the OEM cams from 6,000 rpm and up with a slight loss at lower rpm. Produces more power than the stage 1 set from 8,000 rpm and up. Performance will be further improved with improvements to intake and exhaust efficiency and FI remapping. 9.78 mm 265 - - 0925-0569 Exhaust. PART #s 0925-0569 and 0925-0570 when used as a set provide increased mid-top torque and horsepower. Produces more power than the OEM cams from 6,000 rpm and up with a slight loss at lower rpm. Produces more power than the stage 1 set from 8,000 rpm and up. Performance will be further improved with improvements to intake and exhaust efficiency and FI remapping. Supplied with decompression mechanism. - - 8.89 mm 254 0925-0570 YZ450F 14-15 Stage 1 ITR intake. Dual-cam engine. Excellent low to mid-range increase. Uses stock valve springs. 9.73 mm 251.8 - - 0925-0882 Stage 1 ITR exhuast. Dual-cam engine. Excellent low to mid-range increase. Uses stock valve springs. - - 9.14 mm 249.4 0925-0883 Stage 2 ITR intake. Dual-cam engine. Excellent mid-range to top-end increase. Uses stock valve springs. 10.03 mm 269.3 - - 0925-0884 Stage 2 ITR exhaust. Dual-cam engine. Excellent mid-range to top-end increase. Uses stock valve springs. - - 9.14 mm 249.4 0925-0885 YZ450F/X 16-19 (stage 2) Intake. Slight bottom end gain to 4,800 RPM and good gains from 6,500 RPM to redline. Uses stock valve springs. Dual-cam engine. Intake and exhaust cams sold separately. 10.795 mm 262.55 - - 0925-1595 Exhaust. Slight bottom end gain to 4,800 RPM and good gains from 6,500 RPM to redline. Designed with Improved Throttle Response (ITR) technology. Uses stock valve springs. Dual-cam engine. Intake and exhaust cams sold separately. Supplied with decompression mechanism. - - 10.16 mm 260.39 0925-1596
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