I have just recently purchased a Scott 1929 Flying Squirrel, my first Scott but not first 2-stroke or pre war machine by any stretch.
After standing for any length of time I can put the fuel on & start the bike first kick no bother, then after running for however long the bike will not restart with the kick-start (not even a sputter) and will have to be bump-started down the street.
The carburettor seems to leak fuel as if the float needle is passing or the level is too high though there is only one position and I have tried grinding the needle surface in with fine compound to no avail.
My RD 350 LC will start better after running for a while whilst starting cold is a bother, I know it’s a bike with decades of technology advancements but it’s the most similar bike I have ran.
The general rule appears to be . Starting from cold requires a tickle . ie a bit rich. From warm no tickle and not rich. So get your carb fettled. Mine does like to be almost kicking back on advance as well. Phil
Go and sort out the flooding issue by swinging the bowl around a bit, by moving the bowl it changes the height of the fuel level within the carb, you can normally get it so that the bottom of the carb should be dry. Do not change anything within the carb
Matthew, 1st we need to know what carb you have,is it an AMAL type 6 or a 3 jet Amal/Binks.If it is type 6 the main jet should not have any part in starting it up (it is normally a 160/170/180 jet) If its a Binks 3 jet we need to know what the jets are & most important what order they are fitted to the carb. “POTTY”
It seems to be an AMAL type 6.
After changing all the seals in the carb and bench-testing it for leaks the bike runs better than ever, no leaks whatsoever!
Whoever made the carb flange seal did a bad job too, it blocked off a good 10% of the port.