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1
Refresh and upgrade your CRF300L's valvetrain with new OEM Honda valves or premium Black Diamond valves, lightweight Kibblewhite springs with titanium retainers, and CBR300R camshafts. New Intake and Exhaust Valves are OEM Honda parts and...
Reviews
4.8
6 ratings
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Great Product
Really lets the motor rev up! Well worth it.
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Philip · 11 days ago
CRF300L BIG BORE kit/ Light weight valve train package
So I bought the BIG BORE kit along with the CNC ported and light weight vales and light weight springs and retainers. I have built plenty of hot rods in days gone by and a light weight valve train package is always on the list of parts to get. The weight savings helps the engine rev quicker and decelerate faster which is great for all types of riding and racing. Along with less punishment that the valve seats receive. It all adds up to a engine that will run better and last longer. Both plusses in my book.
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Neal · January 17, 2026
All the parts look very nice and I'm excited to get started on this project! ☺️