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powervalve

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Getting ready to put a new top-end on my 250xc...what is the proper way or tips that you suggest cleaning the powervalve? This is the only thing that I do not have experience doing so I want to get some inside info before I go ahead.

Q-tips and a can of brake cleaner? Or do I need to disassemble everything?

thanks ahead as I learn the fine art of 2-stroke maintanence coming from a yz 4t.

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Take it apart and clean well. Get the carbon off the flapper too (might take a wire brush after brake cleaner). Replace o-rings, assemble with lube. clear silicone on your flange (front PV cover)

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Thanks for the input...been checking ktmtalk as well and looks like taking apart is the proper way to go. Schematics shows a lot of parts but with my owners manual and schematics...should be straightforward

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its not too bad, Just lay the parts out in a sequence and check the timing marks before they are removed so you can get it right. I like to slide the parts open n closed a few times to see how it works before taking it apart.

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i scribed a line where the flapper gear meets the secondary port gear before disassembly, the oem dots were hard to see

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Just be careful with the amount of cleaner used and where the fluid & debris go, dont let it go down the hole to your clutch. This waste can contaminate the gearbox oil as well as get junk in your clutch.

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