Seller notes

Mudbuster: single cam motor. Improved acceleration, more bottom-end, and no top-end loss.. Uses stock replacement valve springs and rockers.. Uses stock auto-decompression mechanism.. Exhaust Duration (Degrees at 1mm): 248.00. Exhaust Lift (mm): 9.12. Exhaust Lobe Center (Degrees): 104.50. Replacement Exhaust Valve Lash (mm): .25. Intake Duration (Degrees at 1mm): 247.00. Intake Lift (mm): 9.02. Intake Lobe Center (Degrees): 104.50. Replacement Intake Valve Lash (mm): .20 fits YAM YFM660F Grizzl...

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