IRON 225 + REED

[ScooterLoopyJohn]

Looking through my pile of lambretta bits, i have a worn 200 indian barrel ,a tsi 70mm piston and a reed valve manifold. If i bore the barrel to suit the tsi piston and use the reed set up with a 28mm phbh, will i get a torquey motor that is easy to drive at normal around town speeds on standard gp 200 gearing?

[camel]

I reckon so...ive done a cheap iron 200 with an sr piston with a taff copy pipe and reed...i run a 28 and been trying a 26 delloto on it recently and its a great budget motor with good mpg

[mainstand]

Looking through my pile of lambretta bits, i have a worn 200 indian barrel ,a tsi 70mm piston and a reed valve manifold. If i bore the barrel to suit the tsi piston and use the reed set up with a 28mm phbh, will i get a torquey motor that is easy to drive at normal around town speeds on standard gp 200 gearing?

Its exactly what I run with a taffy copy pipe & does everything I require, apart from bring me a brew in the morning..

[CHRIS in MARGATE]

Could somebody expand on this because most threads on this subject just peter out.
What make reed block kit?
Exit on left and have sufficient clearance?
Disadvantages of not using modified piston?
Can you eliminate spit back with unmodified piston?
Is there a performance loss at top end ?
Cost?

Can somebody confirm from experience that by simply bolting on a reed valve kit that performance was no worse and fuel on sumptuous was better.

Cheers
Chris

[rossclark]

I think he's said its a TS1 piston so it should already be cut for 360 inlet timing. If you use an unmodified piston then you're missing the main advantage of the reed as the piston is still what controls whether fuel can get into the crankcase.

The reed should eliminate the majority of the spit back if the piston is suitable.

[jonno]

Chris I fitted a n LTH reed kit on my muggy 225.1 horse power more and improved fuel consumption.I didn't modify the piston .

[CHRIS in MARGATE]

Aha. Good answer. Exit on left side ? Any clearance issues ?

[jonno]

Had quite a bit of jiggery pokery to do ,grind some fins to clear the manifold.I missed out a packer that came with the kit so the manifold did not foul the frame.Cleaned out the manifold,the overlap from the internal machining,to better the flow.Also have to increase the jetting a lot From 120 to 138 main.

[mainstand]

Had my piston holed out to suit & removed a bit of fin to acommodate the Scootrs large reed block. Drawback with this is the only filter that doesn't get squashed against the sidepanel 'LH side' as an MB one you stick on the inside of the panel with no more nails.

[corrado]

I fitted a small atomic reed on my Mugello 225. No problem with fins but it fouled on the frame. I removed so much material from the inlet that I hit thin air but sorted it with JB weld. Shortest rear shock I could find just about gives it clearance. Fitted a TS1 piston. No other mods. TMX27 Mikuni on it, lots of spitback but performs far better than when piston ported and more MPG despite the spitback. 4.7 final drive and ADS3 exhaust, pulls light a train with my 10 stone on it.