Hello Blumbly,
Fisrst of all thanks for the reply
. Just to clarify some suggestions and my earlier report:
1. Engine just manages to run above idling speed at WOT (wide open throttle)... it will not rev out!
2. Cable adjustment is good - i have verified cam operation from full closed position to WOT position.
3. The spider (lifter) sits in three (3) groves in the carby body and rises and falls nicely as the cam rotates.
4. The carby has the idle adjustment knurled nut on the back cover but it does nothing.
5. The main jet screw does not have a groove machined in it .
I don't understand the lettering on the bottom of the poppett - Can you tell me the significance of the lettering? It appears to me that the poppett is symetrical so it's final resting installed position should be irrelevent???? I've tried black poppetts and clear plastic poppets but neither have cured the problem.
It actually appears to me that the the cam contour is NOT allowing the poppett valve to fall sufficcinetly to supply enough fuel to the engine.
I suspect that that the internals inside the carby body are a mixture of both LM series and G4 series carburettas and this is where the problem lies..... Maybe the cam contour and poppett mismatch???
But really, its got me suffed why the engine does not rev out???
- BUMPS
Last edited by Bumps; 24/07/15 05:27 AM.
