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Old 12-28-2017, 12:46 PM
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Default Cylinder Plating

     

Putting this in the Kawi forum since it's about a 2003 KX125:

Does anyone do different pricing for 125 vs 250cc (and others...) anymore? I'm about to send out a cylinder to PowerSeal (it's the cheapest I've found and I liked how my '00 CR250 cylinder came out with them) and I recall several shops had different prices for smaller bores a few years ago when I did my CR.
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Old 01-12-2018, 07:56 AM
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Got a call from PowerSeal yesterday and the cylinder is a bit too far gone. They are suggesting an overbore to a 56mm (134cc). Before pulling the trigger on that: Does anyone have a 2003-2005 cylinder they wouldn't mind parting with??
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Old 01-12-2018, 02:45 PM
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I've decided to pull the trigger on a stock cylinder from U.S. Chrome since they offer an interchange program. I sent them a pic and they are saying it's just flaking of the original Nikasil and they will accept it as a core. This is interesting to me since this is my second time using PowerSeal and the first time, I also had an issue where they claimed my exhaust bridge was broken and needed to be welded. I knew a bit less about bikes than I do now, but I do remember looking at the cylinder when I stripped it and did not see a broken exhaust bridge. Anyone else had issues with them "up-selling" services??
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Old 01-14-2018, 12:59 PM
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I've heard of some employees at various companies may be "pickier" with what they recommend. The plating is pretty thick and I've had dozens of cylinders repaired with the plating flaking off. I've also done plenty of 2mm overbores on 2 and 4 strokes. Typically the 2 strokes don't require any bottom end work with a 2mm overbore. A 4mm overbore on a 125 requires clearancing the cases, usually at the front of where the cylinder extends into the cases to make room for the exhaust side of the piston when it is approaching BDC.

A YZ134 (2mm over) runs very well. Same with a KX134. The 4mm overbore run that much better. A YZ265 (2mm over) is handfuls of fun! A YZ295 (6mm over) is crazy fun!!!
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