250lc compression test

[jezza]

Hi all
I have just bought another LC after selling my last one about 25 years ago.
Can anyone tell me what the compression should be roughly on a good 250lc?
I can’t find it in the manual. I have 65psi in each pot at the moment and bike seems a bit tired.

Many thanks

Jezza

[rich]

65 is very low, I'd be surprised it it even runs. You should be looking at least 100psi, ideally 110+

[jezza]

Cheers Rich

Looks like I will be whipping those barrels off this week then to survey the damage.

[peter007]

hi would it be the same for a 350 lc ? 110+ ?cheers in advance guys

[abar121]

For rebuilt yeah.

My YPVS was at 90 psi with worn-out barrels and 5+ thou piston clearance. Now rebored 0.5 over