Looking for you good guys advice again…
Been running my PX150 with Polini 180 and PM Evo24 pipe on a 102 main jet , as it’s the only one that was not making it stutter and stop.
The original jet was 98.
Tonight the stuttering was back… big style.
Took plug out - quite black - so went back down again to 98 main jet - seemed hunky dory again. But then on a further test drive - got up to 63mph then POP engine dies altogether !
Sh1t - I think - must have blown the cylinder. After gliding down to about 15mph to let traffic past , tried to start her and off she went again , and took me home at 50mph easy.
All I’ve done recently is switched to Castrol TTS fully synth , and stopped the 1% extra in the tank.
Do you guys think something major is wrong , or is this a easy fix job with jetting, mixture etc?
BTW - I ran the kit in for about 360 miles without going over 45mph , and easy acceleration.