Lambretta Piston kit, 64.50mm, 39mm crown, Race-Tour, piston port cylinders, forged, MB

6450PP39

This is one of our MB forged Race-Tour piston kits these are the strongest most versatile piston ever made for a Lambretta scooter. It provides better than Japanese quality without the additional expense of having to change your con-rod.

Piston dimensions;

Piston size - 64.50mm
Engine size - 186/190 oversize
Induction type - Piston port
Piston crown height - 39.00mm
Piston dome - 7mm
Skirt - 70.50mm
Con rod length - 107 110mm
Gudgeon pin - 16mm
Small end bearing width - 20mm

The piston kit includes;

Piston
Piston rings
Circlips
Gudgeon pin

Suitable for small block cylinders;

Cast iron 150/175
Race-Tour 190 (replate oversize)
SR/KA 175-190
Mugello 190 (replate oversize may need a piston mod)
Casa 190 (Replate oversize)

It is not designed for reed valve type cylinders but is strong enough to be modified for one.

Lambretta Piston kit, 64.50mm, 39mm crown, Race-Tour, piston port cylinders, forged, MB

£ 174.91
Price: £ 145.76 Ex Vat

Features

Stronger and lighter.
Uses 2 wire non breakable piston rings.
Uses wire no tag piston circlips.
Uses the same gudgeon pin through out the piston range.
15 sizes from 64mm to 71mm.

Piston port pistons suit:
All standard 150-175 cylinders bored out to 190.
SR/KA 190 alloy iron lined cylinders.
Mugello 190 alloy cylinders.
Any old type tuned cast cylinders kit.
Our new Race-Tour 190 alloy cylinder kit.

Technical

Made from the latest modern alloy material for 2-stroke engines.
The strongest purpose made forged Lambretta piston available to date.

Development History

Fed up of poor piston quality and supplies in the past, MRB invested heavily in these pistons.
Designed by Mark Broadhurst and piston supplier Cegway who has a history of Formula one piston design.
Tooling was made in the UK and shipped to America where the forgings are done, and machined once back in the UK.

Reasons to Buy

The strongest most versatile piston ever made for a standard or tuned Lambretta.
A full range of sizes in 0.5mm increments from 64mm to 71mm.
Piston kits weight between 244g and 286g.
To date over 500 pistons have been made with not one broken piston.

Tips

Recommended piston to bore clearance for Cast iron cylinders is .003'' - .0035''
Recommended piston to bore clearance for alloy cylinders with iron liners is .002'' -.0025''
Recommended piston to bore clearance for Nicasil or Ceramic plated cylinders is .0015 - .002''
Use only unleaded fuels, avoid the super unleaded type fuels.
Use fully sinthetic oils.
For long lasting reliability, once run in check your ring gap at 1000 - 1500 miles, replace rings if the ring gap has increased beyond acceptable limits.

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