It's a Volo 340 with B172 engine (renault engine). Work well, except ascenting where power almost disappears. Spark plugs are new. Solex Z10 looks without adjustment. I hear soft metalic noise on cylinder head when high power (perhaps, drive valves, but could be normal). More, par gap/power gap looks very narow (2800-3300 rpms). Under 2800rpm don't go up at least overload.
On slopes, with top acelerator pedal, motor firecracker.
Furtermore, user's manual refences a deceleration's mechanism and tachometer's relay... what is it?, Where is it?
Thanks.