Beta Techno

[beta300factory]

Hi guy! My dads beta techno will only start with NO choke on then runs not too bad but a bit boggy and smokey like its over fueling! I have tried playing with the mixture screw but just makes it run worse! Any ideas it's got the delorto carb fitted, thanks in advance ! Also cleaned the carb and air filter all pipes on the carb fine and air intakes are ok!

[copemech]

Hi guy! My dads beta techno will only start with NO choke on then runs not too bad but a bit boggy and smokey like its over fueling! I have tried playing with the mixture screw but just makes it run worse! Any ideas it's got the delorto carb fitted, thanks in advance ! Also cleaned the carb and air filter all pipes on the carb fine and air intakes are ok!

What year bike? Is this a dellorto PHBL? It sounds as though you may need to inspect the float height setting and clean or replace the float valve if it is leaking.

Far as I know the float arms should be parallel with the bowl surface(when inverted) on this bike as is the norm for dellortos unless someone knows different. Amm or so can throw things off.

Also be sure you got a fresh spark plug in during testing.

Hope that helps

[beta300factory]

Thanks for the advice! Now red face time this bike is new to my dad and we just found out the choke works back to front! As in lever up is choke off and lever down is choke on! ?? so now got the bike running not 2 bad! But bad news the crank seals are gone! The gearbox oil level is dropping there is no leaks and the plug has a clear ATF residue on it! Is this a big job? Or not too bad only ever fitted crank seals to cars before! Any special tools required? Thanks again for any help!