Lambretta Race-Tour Chain guide (slipper) top (upper) chain adjuster kit, MB


This MB design is probably Mark's most copied invention invented way back in 1987 and is probably the most copied part ever made for a Lambretta.

Always insist on genuine MB parts and not copies.

This item is essential in any tuned scooter and we recommend it even in a standard scooter.

This chain slipper evolved because we found that the standard Lambretta top chain slipper wasn't strong enough to do its job in a Lambretta engine and can be quite dangerous when it snaps.

We recommend leaving about 6mm play (total up and down) in your chain.

People sometimes ask for a new piece of nylon for their chain slipper when it has worn down a bit but you do not need it - the rollers of the chain will run on the nylon.

We have never seen a chain wear all the way through the nylon on one of our slippers.

These are also known as chain adjuster or chain tensioner.

See TIPS for information on bottom chain guides

Lambretta Race-Tour Chain guide (slipper) top (upper) chain adjuster kit, MB
  • Lambretta Race-Tour Chain guide (slipper) top (upper) chain adjuster kit, MB
  • Lambretta Race-Tour Chain guide (slipper) top (upper) chain adjuster kit, MB
  • Lambretta Race-Tour Chain guide (slipper) top (upper) chain adjuster kit, MB

£ 26.81
Price: £ 22.34 Ex Vat

Related Items (4)

Lambretta Stud 6mm - 16x10x11mm, crankcase side, stainless steel, MB

This stud is for the crankcase side, you need 14 for most crankcases. If youre using a Clubman then you use 13 and the longer... [more]

£ 0.78£ 0.65 (Ex Vat)
Universal Nut 6mm nyloc, stainless steel

This fastener has universal applications.... [more]

£ 0.18£ 0.15 (Ex Vat)
Lambretta Race-Tour Chain guide (slipper) bottom (lower) MB

MB Scooters bottom chian guide slipper. This was designed to compliment our MB original top chain guide slipper. It's fully adjustable for any chain sprocket arrangment. Ideal... [more]

£ 16.24£ 13.53 (Ex Vat)
Lambretta Race-Tour Chain guide (slipper) top (upper) load spreading plate, on its own, MB

This item is laser cut in stainless steel    It is to spread the load from the two studs that hold the top chain... [more]

£ 3.80£ 3.17 (Ex Vat)


This question is often asked.

'If Im using an after market top chain guide/slipper do I fit a bottom chain guide'

From our point of view as the ORIGINAL DESIGNERS there are two ways to look at it.
  1. If you have a reliable high mileage bike, built correctly with perfectly aligned quality sprockets and dont want to constantly strip your motor then FIT ONE!
  2. If youve always got your chaincase side off for a badly put together motor and adjusting the top guide or having constant clutch problems then dont fit one, its the same as a racer, you get to see if the top chain is loose and you can adjust it.
Baring in mind we see lots of poor chains fitted, mainly Indian, which can wear out and be so sloppy in a 1000 miles that the chain can wear into the casing on the TOP and BOTTOM (if no guide is fitted)

It is very important to DTI and shim up front and rear sprockets, never guess, we have see chains wear out in 200 miles, fitting a bottom guide would prevent casing wear on the bottom causing more damage  if you don't know what you are doing!

Reviews ( 4 )


5 star 1. Dave T 14 Dec 2010 

The original & the best,got it today on a new engine re-build,fits perfectly and a good quality feel to it,I'm ashamned to say I had previously bought a copied version for about half the price on this engines previous life which has since let me down.It really does show you get what you pay for,buy cheap pay twice! Would recommend to anyone.Top quality peice of kit


5 star 2. Mark h 01 Jul 2018 

Very high quality , beautifully made . The original and still the best


5 star 3. Nathan 25 Mar 2019 

Good quality would recommend anyone thinking of purchasing. Great delivery service, thank you.


5 star 4. Chris W 01 Nov 2022 

A very high quality bit of kit which I would highly recommend. The original Lambretta item is very flimsy and held together by 3 spot welds.

want to offer a review?
Click here

Questions? ( 3 )

Do you have a Question?

If you would like to ask us a question about this product, please feel free to click here to ask a Question Now!

James R on 05 Aug 2023 asked "Hi - would this be suitable for a 46/16 sprocket combination with 81 link chain?"

MB Scooters Ltd replied: Yes of course

Jonny D on 01 Mar 2023 asked "Why do you not offer a push down tensioner? "

MB Scooters Ltd replied: Because we sell hundreds of top slipper that dont give us any problems

Gary B on 19 Jan 2023 asked "Do I still need a bottom chain tensioner with my Mb top tensioner, also I have one of your back hub bearings,it came with an oring, does it fit onto the bearing, one more the main bearing from Mb has a closed side, am not sure which way round thanks for all the help"

MB Scooters Ltd replied: Yes always fit a bottom chain guide. Rear hub bearings push the O ring into the groove. Rear hub seals fit with the spring towards the bearings

If you feel something is not correct with this product description or image then please contact us using the same link