I also stripped the exhaust down, de-coked the header pipe, plugged one end of the centre box and similar with the silencer and filled them both with white spirit. I left it to soak for a long while in the hope it would liquify all the oily sludge, it did. Runs a whole lot better. While I had it all apart I filed down the sharp corner that the engine number is stamped on - it pokes a hole through the underside of the middle box if this isn't done.
My one used to do that too. It would stall in sections at low RPM - the plug would be fouled - black & sooty The mixture screw was too far in and it was running rich, it needed a plug change every two trials.
I cleaned out the exhaust after it caught fire internally - the smoke was foul and had the split in the centre box welded up. It seems to be a lot better now.
Think I set the mixture screw 1 3/4 turns out, it was way off when I checked.
One of the seals on my Scorpa has started weeping, I've tried running a thin feeler gauge around the seal having removed the dust cap seal. Fingers crossed that this will fix it.
Doesn't seem too onerous to change them out though.
2007 Scorpa Sy250?
in Scorpa
Posted
Plastic bits will have a date stamp on them.