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17-11-2016, 04:44 PM

Have measured the valve clearances now it's on the bench. Different set of gauges and a slightly different result, but fairly close to one's I did a few months ago.

Vertical Cylinder:
Inlet opener: 0.05mm
Inlet closer: 0.0635mm
Exhaust opener: 0.05mm
Exhaust closer: 0.0635mm

Horizontal Cylinder:
Inlet opener: 0.08mm
Inlet closer: 0.0254mm
Exhaust opener: 0.10mm
Exhaust closer: 0.05mm

Aiming for for 0.05mm (max) closer and 0.1-0.12 openers, both of my openers seem a bit too tight. I think I'll go the sand on a sheet of glass method and see where that gets me before looking to buy some.

Can anyone tell me, (Utopia?) how much reversing the half-rings effects the clearance? Ideally I'd like to close mine up slightly, but if anyone can tell me before I try it that would be handy!

It's thrown me a little, as I'd expect the clearance to get looser as the engine ages and shim wears? Or is it because the valve wears the seat and therefore gets closer to the rocker?

17-11-2016, 04:44 PM	#33
RossObey01 Guest Posts: n/a	Have measured the valve clearances now it's on the bench. Different set of gauges and a slightly different result, but fairly close to one's I did a few months ago. Vertical Cylinder: Inlet opener: 0.05mm Inlet closer: 0.0635mm Exhaust opener: 0.05mm Exhaust closer: 0.0635mm Horizontal Cylinder: Inlet opener: 0.08mm Inlet closer: 0.0254mm Exhaust opener: 0.10mm Exhaust closer: 0.05mm Aiming for for 0.05mm (max) closer and 0.1-0.12 openers, both of my openers seem a bit too tight. I think I'll go the sand on a sheet of glass method and see where that gets me before looking to buy some. Can anyone tell me, (Utopia?) how much reversing the half-rings effects the clearance? Ideally I'd like to close mine up slightly, but if anyone can tell me before I try it that would be handy! It's thrown me a little, as I'd expect the clearance to get looser as the engine ages and shim wears? Or is it because the valve wears the seat and therefore gets closer to the rocker? Last edited by RossObey01; 17-11-2016 at 08:42 PM..