BOLD MAGENTA part numbers are new for 2025 PARTS-UNLIMITED.COM 2025 | OFFROAD ENGINE ENGINE 1248 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”. CYLINDER HEAD SERVICE KITS •Everything needed to completely refresh/ upgrade the cylinder head •Include lightweight racing valve spring kits with titanium valve spring retainers, beehive or dual valve springs, steel base washers and Viton® valve stem seals •Black Diamond™ or White Diamond® stainless steel valves for increased longevity (valves are standard size) •C630 bronze valve guides (standard size) • Top-end gasket kit including base gaskets, engine case gaskets, exhaust gaskets, head gaskets and necessary O-rings and washers (as needed per application) DESCRIPTION SPECIFICATIONS KIT CONTENTS PART # HONDA CRF150R 07-22 Max valve lift (intake/exhaust) 0.350”, 1.320” installed height, 45 lbs. seat pressure, 143 lbs. open pressure, 0.350” max lift 4 titanium valve spring retainers, 4 CrSi valve springs (2 intake/2 exhaust), 4 H.T. steel base washers, Black Diamond™ valves (2 intake/2 exhaust), C630 valve guides, top-end gasket kit 0926-3223 CRF250R 04-07, CRF250X 04-17 Max valve lift (intake/exhaust) 0.350”, 1.320” installed height, seat pressure 50 lbs., open pressure 145 lbs. 4 titanium retainers, 4 valve springs, 4 steel base washers, Black Diamond™ intake/exhaust valves (2 each), 4 C630 valve guides, top-end gasket kit 0926-3116 CRF250R 10-15 Max valve lift (intake/exhaust) 0.385”, 1.185” installed height, seat pressure 50 lbs., open pressure 160 lbs. 4 titanium retainers, 4 valve springs, 4 steel base washers, Black Diamond™ intake/exhaust valves (2 each), 4 C630 valve guides, top-end gasket kit 0926-3117 CRF250R 16-17 Max valve lift (intake/exhaust) 0.380”, 1.180” installed height, seat pressure 51 lbs., open pressure 160 lbs. 4 titanium retainers, 4 valve springs, 4 steel base washers, Black Diamond™ intake/exhaust valves (2 each), 4 C630 valve guides, top-end gasket kit 0926-3118 CRF450R 02-06 Intake: max valve lift 0.440”, 1.215” installed height, seat pressure 40 lbs., open pressure 162 lbs.; Exhaust: max valve lift 0.440”, 1.360” installed height, seat pressure 90 lbs., open pressure 220 lsb. 4 titanium retainers, 2 intake valve springs, 2 progressively wound exhaust springs, steel base washers, Black Diamond™ intake/exhaust valves (2 each), 4 C674 valve guides, top-end gasket kit 0926-3120 CRF450R 07-08 Intake: max valve lift 0.440”, 1.215” installed height, seat pressure 40 lbs., open pressure 162 lbs.; Exhaust: max valve lift 0.440”, 1.360” installed height, seat pressure 90 lbs., open pressure 220 lbs. 4 titanium retainers, 2 intake valve springs, 2 progressively wound exhaust springs, steel base washers, Black Diamond™ intake/exhaust valves (2 each), 4 C674 valve guides, top-end gasket kit 0926-3121 CRF450R/RX/ RWE 17-21 Intake: max valve lift 0.440”, 1.340” installed height, seat pressure 50 lbs., open pressure 162 lbs.; Exhaust: max valve lift 0.405”, 1.360” installed height, seat pressure 90 lbs., open pressure 220 lbs. 4 titanium retainers, 2 intake valve springs, 2 progressively wound exhaust springs, 4 steel base washers, 2 White Diamond® Inconel® intake valves, 2 White Diamond® Inconel® exhaust valves, 4 C630 valve guides, top-end gasket kit 0926-3119 CRF450X 05-17 Intake: 0.440” max valve lift, 1.215” installed height, 40 lbs. seat pressure, 147 lbs. open pressure, 0.440” max lift; Exhaust: 0.440” max valve lift, 1.365” installed height, 70 lbs. seat pressure, 203 lbs. open pressure, 0.440” max lift 4 titanium valve spring retainers, 4 CrSi valve springs (2 intake/2 exhaust), 4 H.T. steel base washers, Black Diamond™ valves (2 intake/2 exhaust), C630 valve guides, top-end gasket kit 0926-3224 XR650L 93-19 Max valve lift (intake/exhaust) 0.465”, 1.210” installed height, 70 lbs. seat pressure, 185 lbs. seat pressure, 0.400” max lift 4 titanium valve spring retainers, 4 CrSi valve springs (2 intake/2 exhaust), 4 H.T. steel shims, Black Diamond™ valves (2 intake/2 exhaust), C630 valve guides, 4 red Viton® valve seals, top-end gasket kit 0926-3226 KAWASAKI KX250F 04-06 Max valve lift (intake/exhaust) 0.445”, installed height 1.320”, seat pressure 46 lbs., open pressure 155 lbs. 4 titanium retainers, 4 valve springs, 4 steel base washers, Black Diamond™ intake/exhaust valves (2 each), 4 C674 valve guides, top-end gasket kit 0926-3123 KX250F 07-08 Max valve lift (intake/exhaust) 0.445”, installed height 1.320”, seat pressure 46 lbs., open pressure 155 lbs. 4 titanium retainers, 4 valve springs, 4 steel base washers, Black Diamond™ intake/exhaust valves (2 each), 4 C674 valve guides, top-end gasket kit 0926-3124 KX250F 09-16 Max valve lift (intake/exhaust) 0.445”, installed height 1.320”, seat pressure 46 lbs., open pressure 155 lbs. 4 titanium retainers, 4 valve springs, 4 steel base washers, Black Diamond™ intake/exhaust valves (2 each), 4 C674 valve guides, top-end gasket kit 0926-3125 KX450F 09-15 Intake: max valve lift 0.415”, installed height 1.290”, seat pressure 64 lbs., open pressure 169 lbs.; Exhaust: max valve lift 0.415”, installed height 1.240”, seat pressure 65 lbs., open pressure 170 lbs. 4 titanium retainers, 4 valve springs, 4 steel base washers, Black Diamond™ intake/exhaust valves (2 each), 4 C630 valve guides, top-end gasket kit 0926-3126 KX450F 16 Intake: max valve lift 0.415”, installed height 1.290”, seat pressure 64 lbs., open pressure 169 lbs.; Exhaust: max valve lift 0.415”, installed height 1.240”, seat pressure 65 lbs., open pressure 170 lbs. 4 titanium retainers, 4 valve springs, 4 steel base washers, Black Diamond™ intake/exhaust valves (2 each), 4 C630 valve guides, top-end gasket kit 0926-3127 SUZUKI RM-Z250 10-17 Max valve lift (intake/exhaust) 0.445”, installed height 1.300”, seat pressure 51 lbs., open pressure 160 lbs. 4 titanium retainers, 4 valve springs, 4 steel base washers, White Diamond® intake/exhaust valves (2 each), 4 C630 valve guides, top-end gasket kit 0926-3129 DR-Z400 00-19 Max valve lift (intake/exhaust) 0.440”, 1.205” installed height, 57 lbs. seat pressure, 171 lbs. open pressure, 0.440” max lift 4 titanium valve spring retainers, 4 CrSi valve springs (2 intake/2 exhaust), 4 H.T. steel base washers,White Diamond™ valves (2 intake/2 exhaust), C674 valve guides, top-end gasket kit 0926-3232 RM-Z450 08-20 Intake: max valve lift 0.415”, installed height 1.190”, seat pressure 61 lbs., open pressure 168 lbs.; Exhaust: max valve lift 0.415”, installed height 1.220”, seat pressure 56 lbs., open pressure 157 lbs. 4 titanium retainers, 4 valve springs, 4 steel base washers, Black Diamond™ intake/exhaust valves (2 each), 4 C674 valve guides, top-end gasket kit 0926-3130
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