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Dirt Bike Brands - Other
YZ444 update
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[QUOTE="SFO, post: 585336, member: 21864"] It scared me at first too. The yz-f combustion chamber is quite dense, allowing 14~1 with a flat top piston. I ran mine on pemex with no problems. The torque peak was at 8k and it ran out of air over that. This is a modern design and it shows. I had to rethink some of my pre existing notions on motor set-up as well. Without a piston dome to create higher compression the cross scavenging at higher rpm's isn't effected either, like in a wider valve angle 4v motor like a KLX, or a Husaberg... [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
YZ444 update
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