Wombat wrote:
Another question or two:
Having done one and nearly finished the other I can now compare the two - assuming both have to be identical in a twin set up.
The first one the new butterfly valve sits snugly when closed - no light showing around it's circumference - the second has a slight halo of light when closed only touching in a couple of places. Does it matter?
The Piston in the first sits flat on the bridge no light showing through - the second does not seal down on the bridge and light shows through. There is a small plastic plug in the bottom of the piston which the second one sits on while in the first the plug is below the surface. In the drawings this plug does not seem to "plug" anything is it important?
Also are there Right and Left pistons? The brass lug in the side of the piston chamber is on opposite sides which means that in one, the air bled holes in the bottom of the piston face the front and the back on the other.- Does this matter?
You can centre the butterfly by loosening its 2 screws 1/4 turn, close the throttle so there's no light showing, then tighten the screws. Holes in butterfly are O/S for this purpose. A drop of Loctite on the screws is a GOOD idea..
Yes there are LH & RH pistons. The bleed holes MUST face the motor. The vacuum to lift the piston is applied there.
re the plastic plug, I can't remember.. been too long..
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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.
