Hi,is this kit piston port or reed valve and when are you expecting some more in stock? Cheers.....Steve

These are piston port. Due Dec/Jan

Hi just received my RT225 kit. Do you do a 4 point fitting exhaust stub for the kit that my franspeed super tourer will fit into ? Regards Mark

We only do these http://www.lambrettaspares.com/spares/exhaust-systems/oval-exhaust-flange,-steel-4-hole-type,-8mm-thick,-mb/mrb0845.html

Hi Does the carb sit on the standard or non standard side Regards

They sit on the standard left hand side

I'm thinking of getting this kit.Will it fit on an Indian 200 case,if so will it need any base packers/gaskets. Yours,Paul Metcalfe

It comes with base thin packers/gaskets to suit the standard 107mm con rod, if you use a 110mm con rod we do packers to suit

Hi Mark, does the fitting of a reed valve assembly affect the fuel consumption greatly? Thanks, Steve

Always depends on how good you have the jetting in the first place. With the RT kits and MB shorty reed assembly fuel economy usually goes up and it can be up to 20mpg!

hello, can you run this kit with a 60mm stroke crank? if so do you recommend any modifications? thanks

Yes 60, 62 and 64mm cranks. 60mm is easy, straight fit just set up using packers to set port timings or head gaskets for squish clearance.

I\'m planning on buying one of these kits, along with one of your BGM clubman exhausts, dellorto carb kit and having the inlet and exhaust manifolds matched. What set up would you suggest would be the best, standard size crank or 60mm and which carb kit 28mm Dellorto or the 30mm? Cheers, Dom

It's totally up to you on crank size, both work well and the kit works perfect with both, same with the carb both work well. I guess 60mm and 30mm for more top end speed

I currently have a SX200 casing which has had the transfer ports modified by yourselves to match a TS1 etc (match and flow / LAB019) Could you tell me if this kit would fit the modified casing ? Thanks

Yes no problem but the transfers will need matching, which is an easy DIY job or we can do it

Hello Mark , I just bought this kit MRB225 to mount on my SIL GP200, with 30 dellorto, clubman BGM 4, 19x46, BGM clutch ... and I do not know which crankshaft to buy, in your advice you say "The rod of 107 mm standard length limits the configuration of the cylinders" which of these crankshaft do you advise me? Lambretta Crankshaft, 58x110mm, Gp, full circle, gold bgm Lambretta Crankshaft, 60x110mm, Gp, full circle, bgm, which is the simplest to configure? thank you so much cordially CÃ©dric

The easiest to fit would be the 58mm x 110mm

Hi Im thinking of getting one of these kits and fitting an LTH reed.Can you supply it with a piston with windows ?

We can do a swap for a reed version MB piston, but don't recommend that reed block we recommend our own shorty Reed assembly which gives more power

Hi, am planning on buying this kit, if I do would you be able to advise on basic jetting. I have the BGM exhaust and a 28 Dellorto PHBH currently jetted for a Monza(both bought from yourselves).

Yes we can but all this information is on our Tech-Site. As is setting up and running in instructions

Hi I have recently purchased RT 225 kit ,along with 30 mil dellorto carb and mk 3 bgm exhaust .I'm having trouble starting and when I do the scooter is running badly in 3rd and 4th gear , I have had it on the dyno .The main jet was lowered to a 120 yet still running as if is rich in 3rd and 4th ,the plug is a nice brown colour . im worried to drop main any smaller ,I would appreciate if you have any ideas .thanks Paul

Some kits run smaller main jets if fitted with a air filter, but be careful. It could be a rich atomiser causing the problem

I have bought a rt225 kit. Can I run it on a sh/22 mm dellorto and if so what jetting Thanks Tony

Yes it should run no problem, but you will have to try it and up jet it, which depends on so many variables. Sorry we've not tried a 20mm

Hi...What HP & Torque figures should I expect to see using RT225, MB V4 Clubman, 30mmPHBH, 58/107 Crank and SX/TV Gearbox...Thank you

It depends on final set up. Should be around 16-18 bhp and 14-15 torque at the rear wheel. Some more - some less depends on the dyno. Not just about figures on that one its how it rides

Hi Mark, would a 42mm clubman work,or would you go 48mm cheers Aaron

The RT kit will run on any Clubman, the MBgm version gives the best alround spread of power

i'm looking to fit this kit into a standard sil 200 engine.you provide base gaskets but what head gaskets should i look to be ordering in order to set the squish?..thanks mike

Cylinder kits come with varying base packers, there should be no need for a head gasket

Hi guys just finished running in my bgm 225 race tour (standard) does everything it says on tin .but whereâ€™s always a but it has a violent kickback when starting from cold is this something I should be worrying about ? Thanks

Could be a number of things, lightened flywheel, incorrect timing which needs checking. Or give it more of a heavy kick

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Lambretta Cylinder kit, RT225/230, standard piston ported, Race-Tour MBgm

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£468.00 £390.00

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MBGM0260K

Cylinder kit 225 (RT kit) MBgm (Race-Tour)

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Questions (22)

Reviews 9

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Technical

Please click here for the official fitting booklet

It includes:

Alloy cylinder fully cast and machined with modern retro port spec
Plated cylinder bore
70mm MBgm CAST coated Race-Tour piston kit
Machined CNC cylinder head with 8 point mounting
High tensile long cylinder studs and special head nuts
Exhaust manifold studs and washers
MB exhaust deep Brass nuts
Inlet gasket
4 point exhaust gasket
0.5 and 0.7mm MB base alloy gaskets
4 high tensile head bolts and washers

Ready to fit.

Small end bearing and heads gasket come separately.

PLEASE READ THE SETTING UP INSTRUCTTIONS AND CARB SETTING UP BEFORE YOU PHONE FOR ADVICE

Click here for Setting up instructions

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Brand	MB Racetour

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Long term reliable and powerful porting specs.
Can be used with standard or performance carbs from 18 - 35mm.
Can be used with standard exhausts, Clubman or performance expansion chambers.
4 studded exhaust flange, but can still use standard exhausts no problem.
Thicker anti warp head and base faces.
Improved port flowing.
Alloy cylinder to run cooler with an extra top fin.
Nicasil plated for long lasting friction free running.
Easily modified transfer feeds to match existing over sized transfers.
Uses top quality MBgm Race-Tour forged pistons.
Cylinder head recessed into the cylinder bore for easy set squish clearances.
Extra four studs to bolt cylinder head down.
The most versatile Lambretta cylinder kit ever made.

Mark Broadhurst has probably tuned and machined more Lambretta cylinder barrels and heads than anyone else this development and history of tuning has been put into our touring cylinder kit.
The key word is touring but with plenty of further tuning potential and reed valving.
Mark has developed his often copied touring Stage 4 tuning technology and modified it into a modern cylinder kit.

Check ring gap before fitting.
Check the cylinder slides down the cylinder studs and drops into casing free.
Seal base gaskets or faces with silicone sealer.
Seal cylinder head gasket or faces with a loctite.
Torque head nuts down to 18-20 lbs ft and re-torque at 500 - 800 miles.
Always check squish clearances, it should be 1 - 1.5mm.
These cylinders have a new shape inlet 200 type port, inlet manifolds ideally need matching to suit.
Early cylinders can be tight on the exhaust port fins, so some modification is required if using the MBgm Clubman

Gearing, depends on your weight, if you drive 2 up with luggage, the type of riding you want to do, exhausts used and the top speed you want from the kit.

Examples are from 5.2:1 - 4.3:1

Li150 Italian 15x46, 16x46, 17x46, 17x47, 18x47
Gp125 Italian/Indian 18x47, 19x47,19x46, 20x46, 20x47
Sx200 15x46, 16x46
Tv200 15x46

All this gearing information is in our Tech-Site

CNC machined.
Nicasil bore.
Uses MB Race-Tour MBgm pistons.
Power out put vary depending on set up and who's dyno is used, we've seen from 9 - 22bhp from a standard cylinder.
Comes with normal 39mm crown height pistons to suit 107mm or 110mm con rods.
With the use of different base/head gaskets/packers port timings are adjustable to suit touring or Road-Race use.