Piston kit, 66.50mm, 39mm crown, Race-Tour for Lambretta piston port cylinders, MB

6650PP39

This is one of our MRB 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 - 66.50mm
  • Engine size - 200
  • 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 large block cylinders;
 

  • Cast Iron 200
  • SIL 200
  • Rapido Road/Race 200
  • Mugello 200 (replate oversize)
  • Race-Tour 200 (replate oversize)
     

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



Piston kit, 66.50mm, 39mm crown, Race-Tour for Lambretta piston port cylinders, MB

£ 155.12
Price: £ 129.27 Ex Vat



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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:
  • SR/KA 200 alloy iron lined cylinders.
  • Mugello 200, 225 alloy cylinders.
  • Standard 200 and Factory Stage 4 cylinder kits.
  • Rapido 200 cylinders.
  • Any old type tuned cast cylinders kit.
  • Our new Race-Tour 200 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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Questions? ( 2 )

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Ash on 13 Apr 2011 asked "I have a question about "Race-Tour piston kit for piston port cylinders, 66.50mm, MRB" silly question but wanted to make sure.. i take it the dome on the piston crown is the same as a standard lambretta piston at 6mm.. will be having one thanks"

MB Scooters Ltd replied: Same dome as a standard Lambretta

Max c on 17 Sep 2008 asked "I have a question about "Race-Tour piston kit for piston port cylinders MRB 66.5" Good Morning, I need information about MUGELLO big block I have kit MUGELLO 200 and I'd like to know if is possible to modify the cylinder of MUGELLO: it is possible to make larger the TRAVASI(???!!!) Can I use your piston MRB 66.5-- pc66.5 or MRB 67 -- pc67 for MUGELLO? Can I send You the cylynder? If is possible, how much will it cost with the shipping? thanks regards max contin"

MB Scooters Ltd replied: Yes our Race-Tour pistons will fit the Mugello barrel.



But because the Mugello is a plated cylinder the barrel will need reboring and replating to suit the piston.



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