Scooterotica

i have a118 main jet in a 28mm delorto on a 175 kit,i have just fitted a mb developement air ram filter ,should it still be ok with the 118 jet or should i up it to a 120?any help appreciated..
kev

you sure it's a 28mm? as I have a 103 in my 28mm on a Rapido Race 200 kit..

rog60 wrote:you sure it's a 28mm? as I have a 103 in my 28mm on a Rapido Race 200 kit..

yep,its a 28 mm

Roadrunner what exhaust are you running? Have you gone from airbox to ramair? You will need to re-jet if changing the air intake on an engine.

Have a look here for a few ballpark delly setups inc a 175 kit.
http://bristollambretta.webs.com/26mmphbhjets.htm

bristolLambretta wrote:Roadrunner what exhaust are you running? Have you gone from airbox to ramair? You will need to re-jet if changing the air intake on an engine.

Have a look here for a few ballpark delly setups inc a 175 kit.
http://bristollambretta.webs.com/26mmphbhjets.htm

50mm big bore exhaust and the 28mm dellorto just has the plastic bellmouth on and i am getting fed up of cleaning the oil residue of the side panel so i got the ram air filter and am a bit worried it may seize.will have a look on the link you stated and thanks for your help..
kev

118 is a huge main jet for that set up. Does it rev right out in 2nd and 3rd without choking up?

Diablo wrote:118 is a huge main jet for that set up. Does it rev right out in 2nd and 3rd without choking up?

it had a 145 in it when i built it .its done 500mile and it is a bit boggy,it has to be well reved to go.beedspead told me what jets to use when i purchased the carb and was told if i go much lower than a 118 it may seize up,,,kev

did a tidied up iron 175 for a lad, 28 dellorto, 42 clubman. 108 main, 48 pilot, 70 choke, av264, x7 top notch, remote filter, 300 float jet and needle set up, light flywheel,standard GP gearbox, 18/47 (5.2) goes really well. the carb was from the breakers, the pipe was his mates, and the top end was a bored out indian GP 150, with an e-bay head, cost him about 130 quid all in ! never missed a beat in three years! (ive only got a 122 main in my rapido 225! 145 main is MAHOOSIVE! )

goldeneye wrote:did a tidied up iron 175 for a lad, 28 dellorto, 42 clubman. 108 main, 48 pilot, 70 choke, av264, x7 top notch, remote filter, 300 float jet and needle set up, light flywheel,standard GP gearbox, 18/47 (5.2) goes really well. the carb was from the breakers, the pipe was his mates, and the top end was a bored out indian GP 150, with an e-bay head, cost him about 130 quid all in ! never missed a beat in three years! (ive only got a 122 main in my rapido 225! 145 main is MAHOOSIVE! )

done a full restor on my indian gp 150.new barrel and piston and head at 175.full grit blast and paint job,lambretta red.looks well nice but this carb is a problem.it ran good when first built then it was running shite after 3 yrs but only 500 miles in that time,,turns out the piston rings were the wrong ones for the piston so a new piston and rings sorted it,,,thinking of taking it to leads on the dyno to sort it once and for all ...kev

goldeneye wrote:did a tidied up iron 175 for a lad, 28 dellorto, 42 clubman. 108 main, 48 pilot, 70 choke, av264, x7 top notch, remote filter, 300 float jet and needle set up, light flywheel,standard GP gearbox, 18/47 (5.2) goes really well. the carb was from the breakers, the pipe was his mates, and the top end was a bored out indian GP 150, with an e-bay head, cost him about 130 quid all in ! never missed a beat in three years! (ive only got a 122 main in my rapido 225! 145 main is MAHOOSIVE! )

when you say a 175 kit, it could mean anything, my set up on a tuned 175/li150 barrel was 180 exhaust 125 transfers and 165 inlet, with a 30mm phbh it had an av 266, main 128, cant remember the needle tho, 40 slide filed to suit, running with a pm pipe