Cylinder Plating to Matched Piston ??

[GasGasDreamer]

Hi,
I have a '06 EC300 that has a lot of hours on it without a top end rebuild.

Is there any good shops that can do the replating and also proper fit a new piston to it?

Maybe I'm making to much of this, but when I read about A and B sizes and cylinder wear and clearance and cast vs. forged.....well my little brain hurts.

I love my GG. I don't have money to burn but I would rather do it once right.

Any comments, thoughts, or recommendation's?
Thanks
GasGasDreamer

 

[Wimpy525]

Powerseal USA www.powersealusa.com
I know the owner pretty well (he's the trailboss for my clubs enduro) cylinder comes back looking factory fresh.

 

[hamilton]

Powerseal USA www.powersealusa.com
I know the owner pretty well (he's the trailboss for my clubs enduro) cylinder comes back looking factory fresh.

+1
I've heard nothing but good things about their work.

 

[GasGasDreamer]

Thanks for the lead.
My concern is proper piston to cylinder clearance.
I think its different for cast pistons vs. forged pistons.
And then there is the A or B size [I think I see 3/4 of a capital A stamped on the cylinder base].

Am I making this harder than it needs to be [I tend to do that].
Sorry for my confusion.

Someone suggested I just throw some rings in but I have heard, and think, that the piston gets fatigued over time.
So while it may look fine it is just a problem that is waiting to happen.

 

[pscook]

Thanks for the lead.
My concern is proper piston to cylinder clearance.
I think its different for cast pistons vs. forged pistons.
And then there is the A or B size [I still cant find the stamp to see what mine is].

Am I making this harder than it needs to be [I tend to do that].
Sorry for my confusion.

It is rather simple: Send your new piston and old cylinder to the vendor, they will do the rest. Not that I am being glib or dismissive, but these guys do exactly this for a living and they have exceptional experience, regardless of the piston manufacturer or process. As long as they have the slug and jug in hand, everything will go well to plan. They will size the bore to perfectly match the specs of the piston, regardless of current bore size. The process is to strip the current plating, check the roundness of the bore, and coat it to match your piston dimensions.

My recommendation is to purchase an "A" piston and have it lined to match. This way, it is "known" and you can start fresh. Next piston to go in would (potentially) be a "B" piston, depending on cylindricity of the bore.

These guys are pros, you don't get a good reputation by not having a clue about your job. Langcourt, Powerseal, Millennium Technologies, all reputable companies with years of experience and thousands of satisfied customers.

 

[GasGasDreamer]

It is rather simple: Send your new piston and old cylinder to the vendor, they will do the rest. Not that I am being glib or dismissive, but these guys do exactly this for a living and they have exceptional experience, regardless of the piston manufacturer or process. As long as they have the slug and jug in hand, everything will go well to plan. They will size the bore to perfectly match the specs of the piston, regardless of current bore size. The process is to strip the current plating, check the roundness of the bore, and coat it to match your piston dimensions.

My recommendation is to purchase an "A" piston and have it lined to match. This way, it is "known" and you can start fresh. Next piston to go in would (potentially) be a "B" piston, depending on cylindricity of the bore.

These guys are pros, you don't get a good reputation by not having a clue about your job. Langcourt, Powerseal, Millennium Technologies, all reputable companies with years of experience and thousands of satisfied customers.

Thanks for taking the time and effort of the reply.
I really appreciate it.

Wossner Forged Piston
http://www.wossnerpistons.com/produ...77DA/name/wossner-piston-gasgas-ec-72-mm-bore

Wiseco Forged Piston
http://www.wiseco.com/ProductSearch.aspx

Vertex Cast Piston
http://www.na.vertexpistons.com/ProductInfo.aspx?item_id=6190

 

[(F5)]

My old 200 had a Wiseco & I replaced it with such. The 300 had a Vertex std I think & replaced it with a Wossner. Wossner was cheapest here & looked like a nicely forged piston, I'd buy another no doubt, but I haven't pulled it out.