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Message: [QUOTE="dirt bike dave, post: 628176, member: 18302"] Agreed.  I usually ran 12/48 on my '90 KDX200, used almost exclusively in woods.  With stock gearing the bike will run 70+ mph; I almost never topped 45 mph, but did run lots of nasty trails.  Making 2nd gear more usable in nasty stuff is a big plus. As far as chain wear, this is a KDX we are talking about, not a KX500.  Front sprockets are cheap; like $12 each.  Replace it twice as often if you are worried about it prematurely wearing out your expensive chain and rear sprocket.  If using a partly worn chain wears out your new $12 front sprocket faster then it would if you put a new chain on, well that's just no big deal to me.   [/QUOTE]