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running a new piston and barrel
Posted: Sun Nov 27, 2011 6:02 pm
by marktheskin
hi just bought a sil lambretta gp150, its had a new piston and barrel on it and i was just wodnering how long i need to run it on for and what mix i should be doing for 2stroke to petrol.
any help would be great
cheers.
Re: running a new piston and barrel
Posted: Sun Nov 27, 2011 7:46 pm
by bristolmod
approx 500 miles at 4%.
Don't be too gentle whilst running in- a little bit of caning now and again is OK- lots of short fairly fast journeys will pay dividends
Chris
Re: running a new piston and barrel
Posted: Sun Nov 27, 2011 8:09 pm
by soosh
bristolmod wrote:approx 500 miles at 4%.
Don't be too gentle whilst running in- a little bit of caning now and again is OK- lots of short fairly fast journeys will pay dividends
Chris
Couldnt agree more. None of this 1000mls at 40/50mph bollox.I ran mine just round country lanes giving it a few beans in each gear.
Re: running a new piston and barrel
Posted: Mon Nov 28, 2011 10:35 am
by poose
Always run mine in on mineral oil for first 500 miles at 4% mix, helps bed them in and coke up any leaks.
Re: running a new piston and barrel
Posted: Mon Nov 28, 2011 9:12 pm
by cgt75b
I would'nt advise caning
! 45 mph max for at least 300 miles imho
Re: running a new piston and barrel
Posted: Mon Nov 28, 2011 9:27 pm
by mark
it also depends on bore to piston clearance as well
Re: running a new piston and barrel
Posted: Mon Nov 28, 2011 9:35 pm
by Muttley McLadd
mark wrote:it also depends on bore to piston clearance as well
Clearance
s, if it's a Rapido.
Re: running a new piston and barrel
Posted: Mon Nov 28, 2011 9:49 pm
by mark
true lol
Re: running a new piston and barrel
Posted: Mon Nov 28, 2011 10:47 pm
by Doom Patrol
I don't think 500 miles is enough personally. I agree you shouldn't be afraid to go up and down the gears and give it a go here and there, but don't push it to quick too soon. You'll know when the engine is right.
Re: running a new piston and barrel
Posted: Tue Nov 29, 2011 4:52 pm
by Supereibar
Doom Patrol wrote:I don't think 500 miles is enough personally. I agree you shouldn't be afraid to go up and down the gears and give it a go here and there, but don't push it to quick too soon. You'll know when the engine is right.
I am there with you Nev. I would run it say 800 miles on variable speeds making sure the scooter runs in all of its gears on equal efforts, never pushing it, with the exception of revving it downhill with the hand in the clutch. Clearances also will help a lot.
J