BOLD MAGENTA part numbers are new for 2026 PARTS-UNLIMITED.COM 2026 | STREET ENGINE ENGINE 1372 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 SIZE PART # BMW 5/6/7/R80/R90/R100 70-95 Black Diamond™ intake valve Std. (42.00 mm) 0926-2846 Black Diamond exhaust valve Std. (38.00 mm) 0926-2849 Intake valve guide Std. 0926-2850 Exhaust valve guide Std. 0926-2852 Spring kit w/ dual springs, H.T. steel retainers and bases (104 lbs. @ 1.445”/196 lbs. @ 0.367” lift, OK for 0.500” lift) 0.500” lift (max) 0926-2845 HONDA CRF250L 13-21 Black Diamond intake valve Std. 0926-3286 CB750 79-82 (all), CBX 79-81 (all) Black Diamond intake valve Std. (25.00 mm) 0926-3048 Black Diamond exhaust valve Std. (22.10 mm) 0926-3049 CRF1000A/D 17-22 White Diamond™ Inconel® exhaust valve Std. 0926-3410 C630 intake valve guide Std. 0926-3412 KAWASAKI EX500R Ninja 500R 87-09 Black Diamond intake valve Std. 0926-3243 Black Diamond exhaust valve Std. 0926-3244 EX-6 Ninja 650 06-16 C630 intake/exhaust valve guide Std. 0926-3396 C630 intake/exhaust valve guide Oversize (+0.010”) 0926-3397 ZX1000 Ninja ZX-10R 04-07 Lightweight H.T. steel valve spring retainers (set of 16) Std. 0926-3274 ZX1000 Ninja ZX-10R 08-10 H.T. steel valve spring retainers (set of 16) Std. 0926-3237 KZ900/Z1 73-77, KZ1000/Z1 Police 77-05 White Diamond intake valve Std. (36.00 mm) 0926-0349 White Diamond exhuast valve Std. (30.00 mm) 0926-0351 Intake valve guide Std. 0926-0333 Intake valve guide Oversized (+0.002”) 0926-0334 Exhaust valve guide Std. 0926-0335 Exhaust valve guide Oversized (+0.002”) 0926-0336 Spring kit w/ dual springs (use OE retainers and bases) (90 lbs. @ 1.330” / 265 lbs. @ 0.475” lift) Stock up to 0.475” lift 0926-0332 KZ1000J 81-02 White Diamond intake valve Oversized 38.5 mm 0926-0353 Intake valve guide Std. 0926-0333 Intake valve guide Oversized (+0.002) 0926-0334 Exhaust valve guide Std. 0926-0335 Exhaust valve guide Oversized (+0.002”) 0926-0336 Spring kit w/ dual springs (use OE retainers and bases) (90 lbs. @ 1.330” / 265 lbs. @ 0.475”) Stock up to 0.475” lift 0926-0332 VALVES,VALVE GUIDES AND SPRINGS •Extensive R&D on all applications to provide high-performance components that last longer than OEM •Black Diamond™ valves are one-piece forgings made from 21-4N high-performance stainless steel •Trademarked Black Diamond treatment provides a stem that has a longer life capacity •White Diamond® valves are one-piece forgings with hard chrome stems that are virtually impervious to wear •Inconel® 751 exhaust valve are designed to perform in even the most extreme forced-induction racing applications • Tensilite® titanium valves are cut from solid U.S. milled titanium bar stock •Flow bench tested to optimize intake and exhaust profiles • Bar is cut, forged and then the valve stem is pulled from the forging and cross-section reduced, then given a final grinding and machining before being encased in a hard chromium nitride (CRN) shell •Valve guides are made of C630 nickel-aluminum bronze • Super-clean silicon wire used in valve springs is ground, not shaved, and X-rayed at regular intervals to check for flaws •Titanium retainers are made from 6AL4V titanium alloy; designed to be the strongest and lightest for ultimate performance •Keepers not included; use OEM keepers and bases or Kibblewhite keepers and bases •Valves and guides are sold each; spring kits come complete for one motor and include instructions •All components made in the U.S.A. 0926-2846 0926-0349
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