Re: squish too big = non runner? - ports heights

[lambrettasam]

with the head off , move piston to bottom dead centre and see if the top of the piston is level with the bottom of the transfers , u will need to take carb manifold off to check the inlet timing and the same with a mirror on the exhaust to check that theres no problem with these

So i did this and this is what i got:

inlet: 145

exhaust: 181

transfers 84

do those figures mean anything to you?

thanks

[J1MS]

Transfers 84 ?

[lambrettasam]

hmmm, that doesn't sounds healthy... Problem is i don't understand those figures, is there any way to learn more about what standard figures should look like and how to adjust?

Since i think this engine won't be running as it is, I took the barrel off and started to strip it down. It will be undergoing a full rebuild this winter. (new seals, clutch, bearings... everything replaced by uprated materials to cope with a bigger engine)