Mc21 "SP" cylinder port layout March 02, 2012 Second layout, this time from a Nsr250 Mc21/28 SP cylinder. Just about the same as the "R" cylinder but bigger exhaust duration. Taller than an "R" cylinder as well as it has a total height of 86.5mm. Share Get link Facebook Twitter Pinterest Email Other Apps Labels Nsr250 Share Get link Facebook Twitter Pinterest Email Other Apps Comments
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