Valves

[BlackTrx440ex]

my little cousins vavles on his 300 are wicked loud and i wanna adjust them how do i do it? can some one give me directions thank you!!!!

[JIMFROMTEXCO]

.006 on exhaust and .004 on intake, is what i adjust mine to. just remove plastic and tank then remove the covers and its pretty simple if you have done it before.

[bwamos]

0.004 Intake (0.100mm)
0.004 Exhaust (0.100mm)

[300exOH]

I'm 99% sure it should be .004 for intake AND exhaust.
.004 intake/.006 exhaust is for the 400ex.

If you do a search for "300ex valve adjustment" you should find quite a few posts on the subject.

[bwamos]

You are correct. 0.004 intake and exhaust on stock valves w/ stock cam.

I'm running oversized exhaust valves and an agressive aftermarket cam on mine which are adjusted to 0.006" gap.

My bad.
;)

Fixed previous post.

[300exOH]

Originally posted by bwamos
You are correct. 0.004 intake and exhaust on stock valves.

I'm running oversized exhaust valves on mine which are adjusted to 0.006" gap.

My bad.
;)

Fixed previous post.

I wondered...I know you are one of the more knowledgeable 300ex guys on here so I was hesitant to question your post. lol

[theupsmanhatesm]

Quick note, if you have someone else tune your valves be very specific about what you want them tuned into. I've seen too many quads go through a shop and come out worse than before because many shops find valve tunings out of out-dated or dirtbike specs.

I've seen it all too often in my area at least.