info on 220r piston change.
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info on 220r piston change.
I just bought my kdx back from a guy I sold it to two months ago, dont ask me why I sold it ,ok Ill tell you , I bought a kx450 f and thought I needed to sell the kdx.Well long story short I still have both bikes but now leaning toward selling 450 so Id like to make the kdx more better.
If I knew how to post pics on here I would.After getting the bike back form this gentleman he had installed a fmf gnarly desert header and a pro circuit type 296 silencer, are these same manufacturer?
anyway Ive heard of the 220s piston having problems so Id like some input on what I should do.Bike always ran perfect when completely stock for one and Id like to keep it that way.Does the cylinder have any of these coating where you cant hone them?any help with info appreciated.
If I knew how to post pics on here I would.After getting the bike back form this gentleman he had installed a fmf gnarly desert header and a pro circuit type 296 silencer, are these same manufacturer?
anyway Ive heard of the 220s piston having problems so Id like some input on what I should do.Bike always ran perfect when completely stock for one and Id like to keep it that way.Does the cylinder have any of these coating where you cant hone them?any help with info appreciated.
- scheckaet
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fmf gnarly desert header and a pro circuit type 296 silencer, are these same manufacturer?
one is FMF, and the other is pro circuit...
The piston on 220 are time bomb, replace or you could destroy your engine top and bottom. weisco will work
cylinder has coating, really hard, can't hone that
one is FMF, and the other is pro circuit...
The piston on 220 are time bomb, replace or you could destroy your engine top and bottom. weisco will work
cylinder has coating, really hard, can't hone that
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Blaze, I cant say anything bad about th 450,I bought it this winter,and haven't had a chance to ride it.Ive read that these 450 get hot if you dont get them in some moving air,I dont hall ass,Im too responsible now,
Im just worried that the 450 wont match my riding.Not to mention Ive got twice as much in the 450.Ive rode the bike arouned my property abit and its got "IT".I dont think I need " IT".I might just be intimidated by it, Im very comfy on the kdx.
Im just worried that the 450 wont match my riding.Not to mention Ive got twice as much in the 450.Ive rode the bike arouned my property abit and its got "IT".I dont think I need " IT".I might just be intimidated by it, Im very comfy on the kdx.
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- Colorado Mike
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If the plating is in good shape you just go over it with a scotch-brite pad and replace the piston, rings, wrist pin, little end bearing, clips, and gaskets.
If its worn through or damaged, you can have it replated, buy a new one, or get a used one and hope it's good.
If its worn through or damaged, you can have it replated, buy a new one, or get a used one and hope it's good.
Mike
Life's tough, it's even tougher if you're stupid.
'04 KDX220
Life's tough, it's even tougher if you're stupid.
'04 KDX220
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- scheckaet
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take some FOCUS pics of the inside of anything suspicious, makes it easier to help
02 KX 200 hybrid: RB head and carb
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Dont wait on the piston. I had my 220 for 2 years and never had a problem.I read about the problem on this forum,but figured just one more ride,then one more ride,then one more ride ,its running great. Finally did the top end last weekend after fighting the urge for one more ride. When I pulled off the cylinder,the whole piston skirt fell out and onto the rag that was covering my crank. No damage so I was lucky. Now I tell everyone that I know not to take a chance
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Ok, I made time to disassembe top end and piston has been removed.
I dont have any tools to measure cylinder so Im taking to a friend who is a machinist to have him look at it.
Inspected piston and cylinder , cylinder has 5 or 6 vey fine less than hair line scratches vertically on exhaust side of cylinder,you cant feel them with your finger nail though, also around bottom edge of exhaust port some of the plating looks thin just near edge less than a 16th wide following bottom edge for about an inch.At top of cylinder where piston rings do not go plating is thin or chipped back less than 16th around 15 % of circumference.Wrist pin and bearing look beautiful,piston has some wear vertically here and there , not bad though,piston will definitely be replaced.Without seeing pics what is the thought so far?
I dont have any tools to measure cylinder so Im taking to a friend who is a machinist to have him look at it.
Inspected piston and cylinder , cylinder has 5 or 6 vey fine less than hair line scratches vertically on exhaust side of cylinder,you cant feel them with your finger nail though, also around bottom edge of exhaust port some of the plating looks thin just near edge less than a 16th wide following bottom edge for about an inch.At top of cylinder where piston rings do not go plating is thin or chipped back less than 16th around 15 % of circumference.Wrist pin and bearing look beautiful,piston has some wear vertically here and there , not bad though,piston will definitely be replaced.Without seeing pics what is the thought so far?
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Ok Im trying photobucket so bare with me .
http://s902.photobucket.com/albums/ac224/clintok1997/
http://s902.photobucket.com/albums/ac224/clintok1997/
- Julien D
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I think it's hard to tell from those pics. In some of the pics it looks great, and in some there are spots that could be glazing or possibly worn plating. Can you try and get a couple well lit (no flash!) shots from the bottom up, sort of an angle so we can see the surface of both of the cylinder skirts? The exhaust ports too!
- scheckaet
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Can you get a FOCUS pic of this, this looks like the plating is worn...
02 KX 200 hybrid: RB head and carb
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Sold ☹ DRZ 400 SM
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bike profile http://www.kdxrider.net/forums/viewtopi ... 0709#30709
newb info: http://www.kdxrider.net/forums/viewtopi ... 57#p117919
jetting guide: http://www.kdxrider.net/forums/viewtopi ... 105&t=1156
- Julien D
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yeah that's one of the pics I was looking at. Can you feel that spot by the sub exhaust port with your fingernail or is it just buildup from the blowby you were getting on that piston? You could give the cylinder wall a good scrubbing over with wd40 and a scotchbrite pad until the pad comes away clean. That helps remove any glazing or deposits and lets you see the actual condition of the cylinder much more clearly.
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Took cylinder and piston to friend , cylinder is within service limit of 69.1mm it measured 69.03mm.The only concern is the plating around top edge of cylinder that is chipped off .The spot that is chippped is above the rings of piston contact and it runs for about an inch aroune top of cylinder,probaly less than a 16th inch wide.also right above the exhaust por t plating is wore or thin about the same.Has anyone had plating that was not perfect like this.Will it hold up ?
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Ive decided to have cylinder replated, Im now asking , barring money as the most important issue, whats the bore to be? Standard bore? punch it out? how much? whose good contact to help with plating and correct piston to bore and whats the 225 and 240 kits Ive heard about?whats reliable and dont want to bore too much to where I cant bore again?
- scheckaet
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most ppl stay with stock bore. bigger bore seems hard to tune, and un-reliable. Want more power, get your carb and head to RB.
02 KX 200 hybrid: RB head and carb
Sold ☹ DRZ 400 SM
bike build: http://www.kdxrider.net/forums/viewtopi ... ike+stable
bike profile http://www.kdxrider.net/forums/viewtopi ... 0709#30709
newb info: http://www.kdxrider.net/forums/viewtopi ... 57#p117919
jetting guide: http://www.kdxrider.net/forums/viewtopi ... 105&t=1156
Sold ☹ DRZ 400 SM
bike build: http://www.kdxrider.net/forums/viewtopi ... ike+stable
bike profile http://www.kdxrider.net/forums/viewtopi ... 0709#30709
newb info: http://www.kdxrider.net/forums/viewtopi ... 57#p117919
jetting guide: http://www.kdxrider.net/forums/viewtopi ... 105&t=1156
- Varmint
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juliend had good luck with langcourt http://www.langcourt.com/ You can get the cylinder replated and spec'd to a wiseco piston. I had a quote done and the price for the wiseco piston kit was only $4 more than RM!