help starting

[crooky]

just fitted a 28mm dellorto open mouth to my stg 4 175 with clubman. Kicked it up no problem knocked off choke went for a blast and it was struggling in fourth knocked the choke back on and sorted once it had warmed up got it home wouldnt start even with easy start spark good changed sparkplug went first time obv flooded. My question is whats best when starting? no throttle? or always try choke if its been stood dont want to have to easy start it just to get to morecambe this weekend.
thanks in advance would the mixture screw help? like I say went first time think the pilots a 50 atomiser 264 x7 needle runs great its as if it needs to warm up if that makes any sense thanks in advance

[coaster]

Could be wrong but it sounds like the main jet is too small, what's in there at the moment?
Re starting, it's usually best to have the throttle shut but be ready to wind it open a bit when it fires.

[crooky]

may have sussed it the stand is wobbly as and leans the scoot to the kickstart side. when i lean/level it towards the carb side it goes first kick. That would make sense as if the scoots leaning to the kickstart side I'm presuming gravity would take more fuel into the cylinder and cause the flooding or am i talking bollox :fb:

[rosscla]

Shouldn't really if you float / needle is working properly as the fuel level in the chamber should still be lower than the chambers unles you've got it on a serious downdraft.

[Solerunner1]

with a carb set up properly, i've never had much of a problem starting a lambretta(i use anything from stock 20-22mm carbs, to 24, 25, 28 mikuni, and 30 dell orto). Use choke when cold, but no choke if it's reasonably warm(even just a bit). I normally kick it over with the throttle cracked(about 1/8). Is it smokey when it's idling? Or no smoke?

You said it was struggling in 4th. Did you try turning the choke on while it was struggling? If so, did that make it better or worse? On any carb with a needle it can be easy to have swings in richness/leaness throughout the throttle positions. Taking note of the spark plug color at specific throttle openings can help. Using old 2 stroke carbs from various sources as i do, i can end up with the pilot too rich, which affects my needle position at 1/4 throttle(i lean it out to compensate). I then end up too lean at 1/2, so i over jet the main to compensate, which can leave me rich, just right, lean, rich as i open the throttle. Basically, all f#cked up! haha. I've seen many bikes at rallies like that.

The key is to know how you're running at each throttle opening. That could easily mess up your starting process

[Joe shields]

if your carb needs setting up there is a good guide here:
http://www.lambretta.co.uk/downloads/carbsetup.pdf
it may help, my lambretta was doing the same when i had a 175 kit on i put it down to the float needle as you had to run it off when it was hot.