Search found 134 matches

by chris2470
Tue Feb 19, 2013 8:32 am
Forum: Lambretta Tech
Topic: Shimming the Gearbox
Replies: 4
Views: 423

Shimming the Gearbox

Just a quick question. At some point before the MOT I need to take the slack out of the gearbox & the end plate by fitting a larger shim but I think it now may be up near 3mm. During this process is it permissible to fit a combination of 2 shims to get this correct i.e, 2 x 1.5mm shims rather than 1...
by chris2470
Thu Feb 14, 2013 7:44 am
Forum: Lambretta Tech
Topic: porting steel barrel
Replies: 29
Views: 3490

Re: porting steel barrel

I've always used a ratio of 62% of the bore diameter, measuring straight across the port. A 70mm 225 will be a sensible 43.4mm wide.
I believe 65% size refers to around the bore.
Others may stand me corrected.
by chris2470
Sun Jul 22, 2012 9:01 pm
Forum: Carburettor Set-ups
Topic: Stock Stage 4+Pwk28/30+JL3
Replies: 1
Views: 1041

Re: Stock Stage 4+Pwk28/30+JL3

Hi Mate, I've run this exact setup on 2nd clip with JJK needle which is slightly leaner at 1/4 throttle for 2 years no problems. I would start with what you have and see how it feels, gut feel it i may be a tad boggy low down. One thing to watch with the OKO, it has a small stand up float stop in th...
by chris2470
Thu Jun 14, 2012 7:24 am
Forum: Lambretta Dyno Graphs
Replies: 23
Views: 12821


Darrell Taylor wrote:heres the piston window i added
Hi Darell, I hope you don't mind me asking but is this piston at BDC ?
by chris2470
Fri Jun 08, 2012 7:23 am
Forum: Lambretta Tech
Topic: How to cut piston Windows.
Replies: 8
Views: 3439

How to cut piston Windows.

Does anybody know the best or safest way possible to cut some windows into a piston. I've also seen many types, from 2 oval or round holes to a single hole, any advice on this will also be greatly received, thank you.
by chris2470
Sat Apr 28, 2012 4:59 pm
Forum: Lambretta Tech
Topic: rapido/reedvalve advice
Replies: 11
Views: 1857

Re: rapido/reedvalve advice

Of course it will run, but better off selling the TS1 piston, get a Avanti or 1mm Asso & cut in the windows to match the inlet.
by chris2470
Thu Apr 05, 2012 1:38 pm
Forum: Lambretta Tech
Topic: Ring gap please
Replies: 8
Views: 856

Re: Ring gap please

An easy way to remember is approx 0.1mm per Inch/25mm of bore.
by chris2470
Sat Dec 10, 2011 9:44 pm
Forum: Lambretta Tech
Topic: koso 28mm -setup
Replies: 10
Views: 2434

Re: koso 28mm -setup

I have run a scootrs one of these for years, I'd recommend 118 main and 40 pilot on a standard 200. Needle will be a JJK 2nd clip.
by chris2470
Sun May 29, 2011 8:38 am
Forum: Lambretta Tech
Topic: MB Reed Block for Piston Port.
Replies: 23
Views: 4512

MB Reed Block for Piston Port.

Anybody recently fitted one of the above?
I'm thinking about fitting one soon, mainly to try and limit the amount of fuel being spat out, so I would be interested in getting some feed back regarding any improvements made.