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Dirt Bike Mods & Maintenance
Does plating a cylinder change the castings properties?
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[QUOTE="EricGorr, post: 695352, member: 19611"] Hi Mike, the cylinder replating process can change the material properties of some cylinders but only if they are welded and prepared by pre-heating, or if the cylinder is cleaned in a type of cleaning oven used in automotive machine shops intened for cast iron blocks. Your cylinder wasn't welded but the RM cylinders have a high percentage of silicon which tends to roll the peak of the thread over time. Unlike any of the aftermarket plating companies I install a stainless steel bolt in all the threaded holes to prevent the tri-acid pretreatment from erroding the peak of the thread and reducing the chance of glass-bead media from getting trapped in the threads, but Sh%t happens in plating. Gilardoni uses the same type of alloy as Suzuki for their Husqvarna cylinders and they install stainless wire inserts in the threads right after the manufacturing process. Thread-Serts work pretty well, its a common problem on RM80/85s mainly because they only have 4 studs retaining the head. [/QUOTE]
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Does plating a cylinder change the castings properties?
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