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MX, SX & Off-Road Discussions
General Moto | Off-Topic Posts
old vs new
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[QUOTE="dirt bike dave, post: 1429727, member: 18302"] Ditto on the powervalves. That is huge. Also, if your older bike is a modestly tuned trail bike, it is going to have much less power than a race bike from the same era. For example, a '78 YZ80 is going to have way more power than a '78 GT80. The little race bikes have much more aggressive porting, higher compression, better tuned exhaust systems, bigger carbs, single ring piston vs. two rings, etc... It all works together, but the cylinder porting and power valves are the big difference maker, IMO. [/QUOTE]
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MX, SX & Off-Road Discussions
General Moto | Off-Topic Posts
old vs new
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