Posted March 10, 201015 yr I know this is a very strange question but one that would be GREATLY appreciated. Im doing some design work on various yamaha engine parts but the problem is that we only have a WR250 here. If possible, if anyone has a YZ450, YZ250 or WR450 could you do me a huge favor and measure the I.D. of the ignition coil bore? We have been trying hard to get locals here to help but it is to no avail. I can promise if you help me out now I will do the same in the future concerning some items that may be of interest. Thanks a bunch Mark
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