Thread: '08 crf 150r
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Old January 4th, 2019, 10:30 AM   #28
jkv45
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Name: Jay
Location: WI
Join Date: Jul 2013

Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes

Posts: A lot.
MOTM - Jun '18, Oct '16
Update of the CRF150R -

This is what I found -









This is what the cam looked like -



The 2 inside lobes are the intakes, and are operated directly, the 2 outside lobes are the exhausts and are operated off of rockers. The closest intake lobe is half gone.

The sprocket mounting hub that is pressed onto the cam, and will slip in the right conditions -



This is where we are at now after 2 new intake valves, seals, springs, tappets, and cutting of the valve seats. Installed the new piston, rings, gaskets, etc, and torqued the head. The bore looked good, and was just cleaned and lightly deglazed.



Need to get the new cam and sprocket hub pinned before installing it so it can't slip and start the process all over again.
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