Hi Guys,

My sons (06) tys175 is having problems, if the throttle is blipped from tickover the engine dies if you bring on the throttle on gently she picks up OK!

I've checked all the usual causes, the mixture screw is 3 turns out and the jets are the right way around at the back of the carby any other ideas?

My next plan of action is too check on the valves, does anyone know the correct settings for these?

This being my third baby scorpa I am quite happy with dealing with most of the bikes problems (not that there has been any) but this one has me stumped!!

Thanks

take off the petrol cap and check you have fuel, switch to reserve and try it with the cap off.

change the plug.

if no joy then take off the mudguard and make sure the air filter inlet is not obstructed, run engine.

still no joy, remove carb make sure jets/passages are absolutely clean and float height is correct,

refit carb/tank and run engine again before you replace air box/mudguard

still no joy, have a cup of tea and a hobnob whilst it cools...

Valve clearance Cold= 0.08-0.12 in, 0.10-0.14 ex

3 turns out on the fuel screw is a good setting if you have a 17.5 pilot fitted. If you have the standard 15 pilot fitted this could be the issue.