Are Pro 785 exh valves treated?

[xlint89]

Does anyone know if the exh valves are treated with any coatings?

Reason I ask is I'm wondering if polishing them would help prevent some carbon build up? Or at the very least take longer to begin build up?

That should help lengthen the time between valve cleanings.


I don't want to do it and find they have an anodized finish or something of the sort.

[785 lugs]

go back to bed Bow LOL

[xlint89]

go back to bed Bow LOL

Believe it or not, this would actually have a use!!!!!!

[xlint89]

I know there are coatings you can have applied.

High Performance Coatings - OEM Coating Technology

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Just wondering if making them shiny and smooth might help?

[Derwood98]

Did't bow say that he had them tested and they were the same coating as the cylinders? I'd say it, but I cannot spell it. LOL. I have a spare set that I keep clean and just swap them out when the time comes.

[bowsniper]

Thats Funny!.lol yeah, The guy used a hand held really expensive(30,000.00) gadget to see what it was. it came up nikisil coating on the outside and aluminum on the inside. the only reason it came up with aluminum was, because the valve was broken and we tested inside where it was broken off clean. otherwise the rest was just nikisil everywhere on it.

[xlint89]

Did't bow say that he had them tested and they were the same coating as the cylinders? I'd say it, but I cannot spell it. LOL. I have a spare set that I keep clean and just swap them out when the time comes.

I believe you're talking about an experimental motor (custom valves) Not your normal production run.

[PolarisNut]

Not sure about the 785 valves, but the rest of Polaris's aluminum exhaust valves are coated with something to reduce carbon buildup. It usually wears off anyway. It specifically states in the sled owners manuals to be careful cleaning the valves, so you don't scratch the coating...FWIW. It looks like an anodizing to me...no way it's nikasil.

[xlint89]

That's what I'm kinda thinking. Thanks Nut.

[xlint89]

PRO 785 exhaust valves are DEFINATELY coated!!!!

There were spots that the coating wore away on a set I had in the basement. My basement flooded last week, the valves got wet, and white fluffy corrosion started to form on the areas that were worn through.

Definately coated, so carefully clean them as to not ruin the finish guys...

And DO NOT polish them, because you will wear through the coating.