300ex valve clearance specs - ATVConnection.com ATV Enthusiast Community

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Old 07-09-2001, 12:17 AM
Pro Rider
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Join Date: Feb 2001
Posts: 410

Right now I have my 300ex's plastic and gas tank off.I figure this is as good as time as any to check the clearance on the valves.

Does anyone know what they are?

Also is there any modifications U can do to the stock intake?Like the airbox?I am going to put a 126 main in it and a uni filter,And uni air box lid vents.Are there any thing else?

86 trx250r setup for mx
97 300ex
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Old 07-09-2001, 11:48 AM
Pro Rider
Join Date: Oct 2000
Posts: 352

Valve specs are .005.

You can replace your air tube (goes from back of carb. to airbox) with one off a 350x, it's a little bigger.
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