BOLD MAGENTA part numbers are new for 2026 PARTS-UNLIMITED.COM 2026 | OFFROAD ENGINE ENGINE 1274 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”. FITS MODEL DESCRIPTION INTAKE LIFT INTAKE DURATION (@ 1 MM) EXHAUST LIFT EXHAUST DURATION (@ 1 MM) PART # HONDA XR75 77-78, XR80 79-03, XL100S 79-85, XR100 81-84, XR100R 85-03 Excellent mid-range and top-end power increase. Uses stock valve springs and rockers. 6.8 mm 236 5.9 mm 216 XR100S1-A CRF80F/100F 04-13 Excellent mid-range and top-end power increase. Uses stock valve springs and rockers. 6.8 mm 236 5.9 mm 216 XR100S1-A CRF150R/RB BW 07-09, 12-19 (stage 1) (stage 2) Single-cam motor. Excellent bottom-end and mid-range power. Uses stock valve springs. Uses stock auto-decompression mechanism. 8 mm 238 7.45 mm 265 0925-0131 Single-cam motor. Excellent top-end power with great over-rev. Uses stock valve springs. Uses stock auto-decompression mechanism. 8.7 mm 254 7.75 mm 273.5 0925-0132 CRF250R/X 04-09, CRF250X 12-13, 15-17 (stage 1) Increased performance through low- to mid-range power. Uses stock auto-decompression mechanism. 8.1 mm 244 8.1 mm 250 0925-0049 CRF250R 04-07, CRF250X 04-09, 12-13, 15-17 (stage 2) Single-cam motor, excellent top-end power with great over-rev. Uses stock auto-decompression mechanism. Uses stock valve springs. 8.4 mm 252 8.35 mm 267 0925-0082 CRF250R 04-09 (stage 3) Single-cam motor, significantly more top-end power and great over-rev. Uses stock auto-decompression mechanism. 8.61 mm 254 8.13 mm 261.5 0925-0269 CRF250R 10-15 ITR Design single-cam motor. Slight loss in low rpm torque, mid to top horsepower are increased. Uses stock auto-decompression mechanism. Uses stock valve springs. 9.14 mm 255 8.84 mm 266 0925-0846 ITR Design single-cam motor. Low and mid rpm torque are increased. Top horsepower slightly increased over stock. Uses stock auto-decompression mechanism. Uses stock valve springs. 8.26 mm 241 8.84 mm 226 0925-0865 CRF250R 16-17 (stage 1) ITR Design single-cam motor. Low and mid rpm torque are increased. Top horsepower slightly increased over stock. Uses stock auto-decompression mechanism. Uses stock valve springs. 9.27 mm 241.61 8.84 mm 266.26 0925-1183 XR250R 96-04 Excellent mid-range and top-end power increase; does not use auto-decompression. Uses stock valve springs and rockers. 9 mm 236 8.7 mm 236 XR250S1-A HOT CAMS •High-performance racing camshafts •Stage 1 and Stage 2 performance camshafts are drop-in cams that are designed to be used with stock valve springs • In most applications, Stage 1 cams deliver more torque and Stage 2 cams provide more peak horsepower •Gold Series camshafts are designed to provide extra torque and horsepower; these camshafts require the use of stiffer valve springs • Select cams feature Hot Cams Improved Throttle Design (ITR) technology; these cams improve throttle response throughout the entire rpm range while providing excellent power gains through the mid-range and top-end •New Builder Series camshafts offer engine builders a multitude of options for different engine configurations •Builder Series camshafts were developed for engine builders that have specific requirements to maximize their particular engine configuration; see notes in the performance description for use with OE valve springs or the requirement of stiffer valve springs
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