Originally Posted by
racer_hh
Hi All,
I will give a short feedback from my OS V-Spec. I have tuned the engine as recommended from M7H and Lille-Bror.
But...
It's really not easy - if the engine idles is 20sec in the higher idle after a fast run and I only give a short shot pull on the throttel it went back to the lower idle. - So I am not able to reduce the idle speed.
So I checked what happens if I lean the LSN more. The engine sounds after a high speed run like ah ah ah - it stutter. -> it seams for me that it is to lean but this is only after high speed block or if I pull full throttel three time on the starter box.
Next time I will check how long it takes to stop the engine after pinching the fuel line.
Br
racer_hh
Sounds like you may have an air leak somewhere? Pull the back plate and carb out. Check the rear inside of the case for cracks (where the back plate slides in) This was a problem on some earlier V-Specs but still happens occasionally on the newer motors.
Now reassemble the motor and seal with RTV silicone or carbseal around the back plate, the carb O'ring and the carb pinch bolt.
Now go back to factory settings and start tuning again using the Ron Paris method