Worn Rings

Anything related to Lambrettas... ask tech questions, post helpful info, or just read and learn.
Bilko
registered user
Posts: 1346
Joined: Thu Jan 08, 2009 12:06 pm
Main scooter: LI150
Location: Belfast
Contact:

Saw a good bit of blow by on the piston and measured the ring gap in the barrel and it's 0.80mm.

I read the gap should be no more than 0.60mm, but this gap wouldn't have been big enough to cause starting problems would it?
Bilko's Oily Blog

Directionally dysfunctional since 1966
Grumpy225
registered user
Posts: 650
Joined: Sat Nov 24, 2012 7:59 am
Main scooter: Gori200, rt195, ld150,rb20
Location: Bakersfield, CA
Contact:

Could be, depends on what the compression is. Typically you need to have at least 100psi for a motor to reliably fire off. I find about 130psi to be a 1-2 kick bike every time. This is all very loose math here as there are lots of factors that will affect compression.
User avatar
chris2470
registered user
Posts: 135
Joined: Tue Apr 07, 2009 8:52 pm
Location: Cambridge
Contact:

Ring gap = 0.12mm per inch or bore.
Best Regards

Chris
Post Reply Previous topicNext topic
  • Information
  • Who is online

    Users browsing this forum: Ahrefs [Bot] and 19 guests