Hello any mechanics on here,
My spi 998cc Hs4 carb mini has recently been having a idle were it goes up to 2000 then back down and dies. The choke is out and the throttle has been squeezed whilst doing so. I have checked the fuel pump that works. the spark plugs are new. The battery is charged. And I have adjusted the carb but I am totally bored of doing that any more!!
Some information online has led me to believe it may be a vacuum leak or sticking piston in the carb, this is all I know.
If anyone could help me out that would be amazing, cheers Bradley