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azextreme · 07-21-2007, 12:26 PM

Do we know what the stock head is all about?? intake/exhaust mm port?, intake/exhaust valve size?? stock can be work or you need to get a race head??

07-21-2007, 12:26 PM	#18 (permalink)
azextreme 1st Gear Member Join Date: Mar 2007 Posts: 113	Re: GPX 124 and 150 engines on sale. Do we know what the stock head is all about?? intake/exhaust mm port?, intake/exhaust valve size?? stock can be work or you need to get a race head??