« previous next »
Pages: [1]   Go Down

Author Topic: Whats the cause of this?  (Read 1335 times)

0 Members and 1 Guest are viewing this topic.

Offline NSR

  • Legend
  • *****
  • Posts: 930
  • Sunshine Coast
    • View Profile
Whats the cause of this?
« on: May 03, 2010, 09:02:14 pm »
I took the head off the Suwm today and found a film of unburnt oil covering the squish area. 
Any thoughts, does it matter?  I haven't have the head off for over a year so done a bit of work.
 


   
Logged
The Swvm though the tree's! http://youtu.be/4h6BbasT16I
Metalink Conondale vinduro sprint. May 19/20 2018    
www.metalink.net.au  Bike trailers & Canopies

Offline matcho mick

  • Legend
  • *****
  • Posts: 2279
    • View Profile
    • Moto Tumbi
Re: Whats the cause of this?
« Reply #1 on: May 03, 2010, 10:35:51 pm »
replace the inlet stem seal ;D
err,maybe the last mix transferred with ignition killed,fuels evaporated over time leaving oil residue,but dosen't explain dry piston top ???
Logged
work,the curse of the racing class!!
if a hammer dosn't fix it,you have a electrical problem!!

Offline Lozza

  • Legend
  • *****
  • Posts: 4206
    • View Profile
Re: Whats the cause of this?
« Reply #2 on: May 03, 2010, 11:04:01 pm »
It's called a piston wash pattern. Stick to fibreglass Mick ;D ;D
Logged
Jesus only loves two strokes

Ji Gantor

  • Guest
Re: Whats the cause of this?
« Reply #3 on: May 04, 2010, 12:17:33 pm »
What Lozza said, that is the pistons wash pattern.
What does the underside of the piston look like.

Ji
Logged
Pages: [1]   Go Up
« previous next »