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crf450x 2005 valve settings

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Just purchased 2005 crf450x and i'm going to check the valves does any one know the intake and exhaust settings? Do you ajust them hot or cold? THX

Edited by BJHUTCHINS
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0.006 Intake

0.011 Exhaust

0.014 Decompressor

When checking the Decompressor put a feeler gauge in the Exhaust (0.011) and then put the 0.014 in the decompressor , if it is off , then loosen the locknut and adjust gap , leaving the 0.011 gauge in the Exhaust while checking

The cam lobes will be facing the rear of the motor(slightly up) , the marks on the side of the cam sprocket(2 slashes,one on each side) level

the large plug on the right case , marks towards front and top(about 2 o clock) line up arrow with mark ,

the small plug on shifter side marks lined up (slash near top) , then check valves by grabbing the exhaust rockers and wiggling , if they are not loose rotate the motor 180 and check everything again , it is criticle that all marks line up before checking !

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You sure about those numbers? Intake .012? I don't think the bike would run with that large of gap for the intakes. If its off that far I'm not even sure if they even make a shim that large. Either way good luck.

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0.006 Intake

0.011 Exhaust

0.014 Decompressor

.04 IN and .06 EX

These seem way different to me.

My 2005-2006 CRF450X manual lists valve clearances:

INTAKE: 0.16 +/- 0.03 mm (0.006 +/- 0.001 inch)

EXHAUST: 0.28 +/- 0.03 mm (0.011 +/- 0.001 inch)

DECOMPRESSOR: RIGHT SIDE EXHAUST: 0.35 mm (0.014 inch)

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These seem way different to me.

My 2005-2006 CRF450X manual lists valve clearances:

INTAKE: 0.16 +/- 0.03 mm (0.006 +/- 0.001 inch)

EXHAUST: 0.28 +/- 0.03 mm (0.011 +/- 0.001 inch)

DECOMPRESSOR: RIGHT SIDE EXHAUST: 0.35 mm (0.014 inch)

Its far from what the manual suggest's but it is what Ron Hamp and other engine builders reccomend. Its what I have been running and it makes the stocker valves last alot longer:thumbsup:

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