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Any Tips on Starting 30mm dellorto

Technical help for Series one, two and three Lambrettas. Models include the Li, Li Special, TV, SX, GP, Serveta and API/SIL models

Any Tips on Starting 30mm dellorto

Postby Granty » Sun Jan 04, 2015 2:47 pm

Guys -- just got my first bike with an open mouthed carb (30mm dellorto) with a ancilotti clubman and 200 lump. I've only ever had standard carbs breathing through the box.

Just cant seem to get the thing started quickly when cold -- it fires up eventually but after many, many kicks, fuel on & off, choke on & off, me on & off -- just wondering of anyone has any "Inside info" on getting this s2 lump of mine started when cold?

Cheers - Granty
Last edited by Granty on Sun Jan 04, 2015 3:09 pm, edited 1 time in total.
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Re: Any Tips on Starting 30mm dellorto

Postby dave411 » Sun Jan 04, 2015 2:51 pm

Choke on,NO throttle ?
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Re: Any Tips on Starting 30mm dellorto

Postby St George » Sun Jan 04, 2015 4:00 pm

I agree with Dave, I learnt the hard way back in 1971. It always started with a bump start with the throttle closed !!
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Re: Any Tips on Starting 30mm dellorto

Postby MickYork » Sun Jan 04, 2015 4:37 pm

Check your choke and jet sizes. had a too small choke on one carb' and had to cover mouth to start it. Also check if the choke cable is lifting the plunger ok (you can see it moving through a small hole in the side).
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Re: Any Tips on Starting 30mm dellorto

Postby Paulnobodyimportant » Sun Jan 04, 2015 5:01 pm

For that set up, you want to be looking at a choke size between 50-70. I've two 30PHBH carbs and both have 70 choke jets in and start fairly easy. But as others have said, do not apply any throttle when starting.
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Re: Any Tips on Starting 30mm dellorto

Postby Granty » Sun Jan 04, 2015 7:11 pm

MickYork wrote:Check your choke and jet sizes. had a too small choke on one carb' and had to cover mouth to start it. Also check if the choke cable is lifting the plunger ok (you can see it moving through a small hole in the side).


Thanks Mick -- where do I look exactly to see the plunger moving? Cheers G
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Re: Any Tips on Starting 30mm dellorto

Postby Scooterlam » Sun Jan 04, 2015 7:15 pm

no choke, stick a hand or rag over the carb mouth and kick.
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Re: Any Tips on Starting 30mm dellorto

Postby MickYork » Sun Jan 04, 2015 10:03 pm

Granty wrote:
MickYork wrote:Check your choke and jet sizes. had a too small choke on one carb' and had to cover mouth to start it. Also check if the choke cable is lifting the plunger ok (you can see it moving through a small hole in the side).


Thanks Mick -- where do I look exactly to see the plunger moving? Cheers G


Look inside the carb' opening and there is a small hole to the left hand side. It's below where the choke cable enters the carb'. You don't need much movement but the plunger has to lift.
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Re: Any Tips on Starting 30mm dellorto

Postby coaster » Mon Jan 05, 2015 12:10 am

It could also be just that it is cold and the choke jet is a bit small, I have trouble starting my TS1 with the choke but it fires up straight away using Scooterlam's hand over the carb mouth method. I really should get round to changing the jet :oops:
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Re: Any Tips on Starting 30mm dellorto

Postby Granty » Thu Jan 08, 2015 9:46 pm

Thanks All -- used the Choke On & NO throttle method ----------- 3 pumps & phrummmmmmmmmmmmmmmmmmm put put put -- Braw :D
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Re: Any Tips on Starting 30mm dellorto

Postby steveg » Thu Jan 08, 2015 10:51 pm

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