pitted cylinder head?

**blaster311** · 02-25-2010, 02:46 PM

Is this going to cause hot spots? There are chunks missing out of the head all over and a couple pieces of aluminum or some type of metal are stuck to the head.A few of the chunks missing are pretty deep. I'm worried about using this on an engine i'm about to dump a bunch of money into.

**fabiodriven** · 02-25-2010, 03:09 PM

Personally, I would run it. There may be some people on here that have run something like this before and can chime in.

**dcreel** · 02-25-2010, 03:15 PM

From what I have read and heard, those gashes will create hot spots which will cause preignition, detonation, or pinging. This will create more damage to the inside of the cylinder head and piston crown. Your best bet would be to take some emery cloth to it to smooth out the roughness.

**ceaserthethird** · 02-25-2010, 03:17 PM

I wouldn't, Might be able to clean it up. ( I think Ronnie does this type of work )

Do a search ...

**fabiodriven** · 02-25-2010, 03:52 PM

Y'know, on a second look I don't think I would run that. It probably wouldn't be too hard to smooth out.

**Tecate 50** · 02-25-2010, 07:01 PM

With the right set up on a lathe.....you can spin it out!

**Mr_RPM** · 02-25-2010, 07:15 PM

my buddy's banshee was like this, he smoothed out the chunks that stick out with a drummel. runs perfect

**Racerguy381** · 02-26-2010, 11:49 AM

Lower end bearing failure is what caused that damage.... If you smooth it out it should be ok, but recutting it in a laythe would be the best way to fix it. Or just find another good head. I would really tear into the bottom end if that head came off the motor like that...

**Mr_RPM** · 02-26-2010, 12:37 PM

yeah, theres some cheap stuff on ebay, thats what i would do if it was mine.

**audioworks04** · 02-26-2010, 01:46 PM

It could probably be run, and could be fixed but I personally wouldn't run it at all. The question is, is it worth fixing? A machine shop is gonna charge you way more than a nice head head would cost. Unless you know a machinist, or it is a rare piece.

**honda250sx** · 02-26-2010, 03:23 PM

Ronnie, AKA Yamahondaman, can definitely fix this for you. Cheap if I remember right. Contact him. Here is some work he did for me.

Before

After

**JohnR.** · 02-26-2010, 06:58 PM

I've seen a bunch of Ronnie's work (mostly parts that he machined) and its top notch!

**RodKnockRacing** · 02-26-2010, 08:16 PM

for the love of god get it cleaned up before you run it

**clutchcargo** · 02-27-2010, 06:14 AM

I wouldn't run it either. Ronnie's really good, have him cut it for you or get another one.

*3WW Star*-Yamahondaman · 02-27-2010, 01:23 PM

Contact me .. i'll hook you up ..
Ronnie

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pitted cylinder head?