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Yamaha MX & Off-Road Dirt Bikes
TTR230 maintenance questions
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[QUOTE="Ol'89r, post: 1298425, member: 17212"] Yes. :cool: Those are excellent Dee Dee thanks for posting. :nod: One thing I forgot to mention is how critical it is to have enough clearance in your valves. Many riders will check their valve clearance and the specs will be below the required clearance but they still have a few thousands clearance. So, they figure since they still have a few thousands clearance it will be ok to ride the bike a little more without hurting it. This is incorrect. When the factory calls for .010" clearance, (as an example) this clearance is engineered so that when the engine heats up to operating temperature and everything expands from the heat, you will still have about .001" or .0005" clearance left for the oil to get in between the rocker and cam. If you only have .008" clearance cold, when the engine heats up you wind up with .0" clearance or minus .001". Now you are running metal to metal without the necessary clearance for the oil. This is when your engine starts eating itself. Many of the problems we see with the new crop of four-strokes is the lack of understanding of how they work and how critical it is to make sure your specs are set correctly. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
TTR230 maintenance questions
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