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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
exhaust port trouble
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[QUOTE="spanky250, post: 142474, member: 20897"] Port window misalignment is a common problem with sleeves, and is one of the reasons sleeving is such a poor way to repair a cylinder. The problem is that you don't know whether the window is in the correct position in relation to the crank or not, so unless you have the expertise to measure the port timing, grinding the ducts to align them with the windows is just a crap shoot at best. If there are bad misalignments, I would take it somewhere that has the tools and expertise to measure the timing and area of all the ports, and if they are not within factory specs, I would have the company that sleeved the cylinder either resleeve it or replace it at their expense. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
exhaust port trouble
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