Does this look like normal piston wear?

[KlotzBanshee]

Right Cyl exhaust port

 

 

Left Cyl exhaust port

 

 

Left again (no flash)

 

 

So is this just normal brake in wear? Runs great, no air leaks, 163 psi comp on both cyls. :shrug:

[okbeast]

The brown looks normal where it's burning and pulling it out but the white area looks odd. I've never really looked at 'em that close though.

[KlotzBanshee]

BUMP

 

All you motor gurus...give me your prognosis please. Do I have a problem or not?

 

thx

-Ryan

[blowit]

ASSWHORE, I don't see problems. Put the pipes back on and ride.....

 

 

 

Brandon

[KlotzBanshee]

ASSWHORE, I don't see problems. Put the pipes back on and ride.....

 

 

 

Brandon

 

 

Oh I have been, I just don't want to melt down a new set of wisecos ya know.

 

there is just a slight bit of galling below the rings that is the cause of my concern.

 

I'd also like to hear what Jeff thinks about it.

Edited July 21, 2008 by AssWhore

[kawiking]

ASSWHORE, I don't see problems. Put the pipes back on and ride.....

 

 

 

Brandon

ur goin to take advice from someone that goes by .. blowit... ?? lol j/k

[KaosBanshee44]

Looks good to me i'm suprised the exhaust port is that clean though usually there is more combustion residue than that. Your gonna get some discoloration cause of carbon residue but that looks fine to me.

 

But ofcourse you only have 4 gallons of gas run through it...lol I would't worry about it did you do a plug chop?

[blowit]

I have had your wife blowing it for years now and no one seemed to mind :biggrin: :biggrin:

 

 

 

Technically galling only occurs with similar metals. :biggrin:

 

 

Man, who is the smart ass today????

 

 

If you are seeing erosion below the rings at the exhaust, you may make sure you have good chamfer on that port. Very common to have problems there especially it someone went wide with the porting. The port will dig into the piston a bit and wear the ring in that area.

 

 

 

Brandon

Edited July 21, 2008 by blowit

[KlotzBanshee]

Kaosbanshee - yes plugs look perfect - stock carbs 330 mains 27.5 pilot 3rd clip 2 turns out

 

If you are seeing erosion below the rings at the exhaust, you may make sure you have good chamfer on that port. Very common to have problems there especially it someone went wide with the porting. The port will dig into the piston a bit and wear the ring in that area.

 

 

 

Brandon

 

Well its not really galling then, I just couldn't think of any other term to describe it. Its very slight, it just barley wore away the lines left from machining in those spots.

 

* The ports have very nice chamfers on all the edges, Jeff at FAST did them.

 

Am I just paranoid??? :ermm:

 

 

-Ryan

Edited July 22, 2008 by AssWhore

[kawiking]

I have had your wife blowing it for years now and no one seemed to mind :biggrin: :biggrin:

 

 

 

Brandon

i dont mind.. i like makin here put a rainbow on mine(diff shades of lipstick)..... i asked her if she ever did that to u ,she said all she could get on is 1 color..... lol

 

:woot: :woot: :woot: :woot:

 

:yelrotflmao: :yelrotflmao: :yelrotflmao: :yelrotflmao:

[Wildcardracing]

i dont mind.. i like makin here put a rainbow on mine(diff shades of lipstick)..... i asked her if she ever did that to u ,she said all she could get on is 1 color..... lol

 

:woot: :woot: :woot: :woot:

 

:yelrotflmao: :yelrotflmao: :yelrotflmao: :yelrotflmao:

That's some funny shit right there....lol :yelrotflmao:

 

Oh, and before I get too off topic... the pistons look fine to me as well. a small amount of rub is normal on your piston skirts. Just make sure you have done a good plug chop to verify your jetting and ride it!

[blowit]

Kaosbanshee - yes plugs look perfect - stock carbs 330 mains 27.5 pilot 3rd clip 2 turns out

 

 

 

Well its not really galling then, I just couldn't think of any other term to describe it. Its very slight, it just barley wore away the lines left from machining in those spots.

 

* The ports have very nice chamfers on all the edges, Jeff at FAST did them.

 

Am I just paranoid??? :ermm:

 

 

-Ryan

 

 

If Jeff worked them, you are fine. Ride it. Keep an eye on the plugs. Go RIDE!

 

 

 

Brandon

[KlotzBanshee]

Ive been thinking.

 

...the reason I had the pipes off when I took those pics is because my idle was acting funny.

 

After I warm it up for a few min, I would blip the throttle, and when the rpms would drop it would then come up a little (maybe 200-300rpms) like it was searching. So I thought "air leak" right? I did another leak down test and it held 6lbs for over 15 min w/o droping at all.

 

So now Im wondering if maybe my head is leaking a small amount of coolant into the cyl and leaning it out a little. My pilot circuit also seems a little lean when I ride it(27.5 two turns out), but once I get on the pipe shee runs like a raped ape. :shrug:

 

So what do ya think? would a small amount of coolant in one or both cyls cause this prob? Im baffled

[KEVSWS6]

Ive been thinking.

 

...the reason I had the pipes off when I took those pics is because my idle was acting funny.

 

After I warm it up for a few min, I would blip the throttle, and when the rpms would drop it would then come up a little (maybe 200-300rpms) like it was searching. So I thought "air leak" right? I did another leak down test and it held 6lbs for over 15 min w/o droping at all.

 

So now Im wondering if maybe my head is leaking a small amount of coolant into the cyl and leaning it out a little. My pilot circuit also seems a little lean when I ride it(27.5 two turns out), but once I get on the pipe shee runs like a raped ape. :shrug:

 

So what do ya think? would a small amount of coolant in one or both cyls cause this prob? Im baffled

 

Sounds like the idle is lean. try turning the air screw on the carb in a 1/2 turn or more or go up one size on the pilot jet. Make sure your not lean on any other circuit.

If you haven't been on it at WOT for any amount of time you might be lean from top to bottom. What carbs and what jetting is in them? Include the needle and clip position. What is your elevation above sea level?