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Petrol Pipe Bore

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

Petrol Pipe Bore

Postby MK Monty » Fri Mar 25, 2016 8:47 pm

Am I better using 8mm Internal diameter pipe and pulling it up with a clip or 6mm tight fit and a clip. Still looking for the holy grail of pipe that doesn't go hard or is not so soft it splits at either end or rubs through against the flywheel cover. Im using nylon braided rubber at the moment and its dripping like a tap. Was looking at stainless braided they also do a teflon lined one. recommendations?
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Re: Petrol Pipe Bore

Postby ToBoldlyGo » Fri Mar 25, 2016 10:56 pm

Anything stainless braided is Satan's work. Have you tried something like this...?

http://www.ebay.co.uk/itm/Apico-Fuel-Li ... XQQQhReUyZ
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Re: Petrol Pipe Bore

Postby MK Monty » Fri Mar 25, 2016 11:57 pm

Used the MB reinforced one and it leaked round the spiral stainless wire. It didn't kink but went rock hard.
I bought black nylon wrapped it rubbed and split half way down
The soft nitrile ones split at the pipe clip and dropped half a tank onto a hot pipe. Was pulled over by a mate just as it went onto reserve. Used the normal scooter shop green or clear plastic ones all ok for a while but go rock hard.
My thinking was that the internal bore is irelavent as the bore of the tap or carb will be nearer 4mm but will the 8mm give more of a reserve to the flow. Not sure why you dread braided stainless
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Re: Petrol Pipe Bore

Postby Scooter Paul » Sat Mar 26, 2016 11:05 am

Whatever you go for make sure it's ethanol proof. I bought some ethanol proof pipe. It hasn't disintegrated but it still went hard. My choice is to go to 8mm and use micro jubilee clips to cinch down rather than 6mm and stretch.
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Re: Petrol Pipe Bore

Postby ToBoldlyGo » Sat Mar 26, 2016 12:16 pm

MK Monty wrote:Not sure why you dread braided stainless


Eventually it frays and sticks in your fingers. Best bit of pipe I ever bought was some thick black rubber stuff from a motorbike shop. I think rubber may be the key here.
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Re: Petrol Pipe Bore

Postby CHRIS in MARGATE » Sat Mar 26, 2016 12:55 pm

Fuel line incl clips from Halford in a bubble pack if I remember. Couple of quid at the most. Never had a problem.
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Re: Petrol Pipe Bore

Postby Honeymonster » Sat Mar 26, 2016 11:22 pm

Some of Halfords sets used to be a brand called CODAN, black rubber, not sure of the bore size but they remained flexible
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Re: Petrol Pipe Bore

Postby Scooterlam » Mon Mar 28, 2016 9:04 pm

I got some opaque purple stuff from a motor cross shop, guaranteed to stay flexi and has done so.
I got some from Halfords but the O.D was a bit large and personally I prefer to see if theres any debris collecting in the pipe.
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Re: Petrol Pipe Bore

Postby MK Monty » Sun Apr 03, 2016 4:41 pm

Well I went for the bigger size fitted and was happy to see no leak, went out and I thought I was going onto reserve, still spluttering stop and look down at the pool of petrol on the road that kept coming with the tap off. Panel off to find the petrol tap had dropped off the bottom of the tank.. On its side and managed to get the nut that had stripped threads on a bit further then after pulling the tank out screw the tap in enough to get home. You have to love riding 55 year old shopping trolleys. Do rear exit fast flows clear the silent block?
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Re: Petrol Pipe Bore

Postby ian i.o.w » Sun Apr 03, 2016 5:13 pm

I get mine sometimes from a boat shop that has reels of pipe for outboard motors and they sell it by the metre
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Re: Petrol Pipe Bore

Postby Tony Hart » Sun Apr 03, 2016 5:43 pm

MK Monty wrote:Well I went for the bigger size fitted and was happy to see no leak, went out and I thought I was going onto reserve, still spluttering stop and look down at the pool of petrol on the road that kept coming with the tap off. Panel off to find the petrol tap had dropped off the bottom of the tank.. On its side and managed to get the nut that had stripped threads on a bit further then after pulling the tank out screw the tap in enough to get home. You have to love riding 55 year old shopping trolleys. Do rear exit fast flows clear the silent block?


Never a dull moment! I've rear-exit taps on a pair of series 2s, one with extended blocks and one with the normal and neither has a clearance issue

Tony
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Re: Petrol Pipe Bore

Postby MK Monty » Sun Apr 03, 2016 10:06 pm

The fatter pipe made it tight against the silent block and I think it knocked the tap back. Looks like it was that that had been leaking all along. You only have to get petrol 4 inches from the tank to the carb FFS. The thread on the tank is good so I will try a rear exit tap.
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Re: Petrol Pipe Bore

Postby ToBoldlyGo » Sun Apr 03, 2016 10:52 pm

I think the Scootopia petrol taps give you a little bit more clearance. They have a nice positive feel to them as well.
Last edited by ToBoldlyGo on Mon Apr 04, 2016 11:25 pm, edited 1 time in total.
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Re: Petrol Pipe Bore

Postby Nigel. S » Mon Apr 04, 2016 10:53 pm

^ Just fitted a Scootopia tap (not rear exit though) and a lovely click when it goes to on and another positive click when it goes around to reserve. And much improved flow.
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Re: Petrol Pipe Bore

Postby dave81 » Tue Apr 05, 2016 2:36 pm

I agree with Nigel. Fitted a Scootopia standard tap and noticed the positive feel in each position.Also noticed that the air gap in the fuel pipe some people mention on the forum has gone.
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