Lambretta Stage Four Tune Setup?

[servetakid]

Ok, all being well I hope to be getting a lambretta soon. But to keep costs down and go a little faster I was thinking of going down the stage four route. So I am just wanting to build up a plan and get an idea.

I was thinking that a JL3 and a 30mm delorto carb would be good for a fast touring setup?

If I end up with a jet200, how would the sx200 gearbox work with this kind if set up?

Also, what piston would people recomend for this kind of set up?

Thanks,

[Muttley McLadd]

That would depend on who does it for you.
I've ridden a few 'stage 4' 200s with an SX box. All were fine until dropped into top.
If you get someone who knows what they're doing, it should pull without a problem.

Soosh's works well, I hear.

Stage 4 used to be slang for putting a drill down the transfers and making the exhaust port as big as your fist.

[servetakid]

I would let the tuner know the set up I have gone for so they can work to that.

Just after any past experience and advice on what would be a good for pulling me and my stuff to a bleak seaside town on the other side of the country....

[cev]

An asso or mahle thin ring piston in a sil top end works well with 30mm/jl3. Whichever way you go, you could run it as it is to get a feel for it, then discuss what you want with your tuner.

[soosh]

Mate,it should pull an sx box piece of p155. Don't go massive exhaust port but don't skrimp on inlet timing.
With a 28/30 and a jl3 (i used the curly),it should pull well,I even thought about sticking a 16t on as it pulled so well.
As far as piston goes,you won't need a forged piston,very few motors do.Some prefer the 2 ring asap which is good,the guy who did mine insisted on the 3 ring mahle which he modified and run on the 2 top rings.But whoever does it for you,as long as they know what their at,I'm sure they will advice well.

[servetakid]

Cheers for that, so it sounds like its a pretty safe set up. I would leave all the complicated stuff like port timings to someone who knows what they are doing

There would be no problem using a Spanish barrel? It's just that most people seem to use Indian when going down this route, is this because they are almost a stage 4 already?

[Muttley McLadd]

Have a flick through here.

[servetakid]

Thanks, good read.

[ducksta]

honda 205 conversion m8

[Bones]

Hey,

I have an original Autisa Spanish barrel on my Jet200, it was tuned to Stage 4 first by Taffspeed then by Readspeed. I ran a Asso Werks piston, JL3, 30mil Dell, Jet200 crank and SX200 gearing. It was last dyno'd at 18.5bhp, it'll do a genuine GPS 80mph and it pulls like a train. I have been around the UK and Europe several times on it and it's never let me down. It was in this state of tune for about 6 years. Recently had it retuned by MB and had an MB crank and piston fitted. It is now faster with even more grunt! A decent set up Stage 4 will last! My bike and my mates Soosh are prove of that.

Bones