Piston kit, 67.50mm, 38mm crown, Race-Tour for Lambretta piston port cylinders, Honda 205, MB

6750PP38LH

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 - 67.50mm
  • Engine size - 205
  • Induction type - Piston port
  • Piston crown height - 38.00mm
  • Piston dome - 2.5mm
  • Skirt length - 71mm
  • 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 which has been converted to old Skool Honda MTX205;
 

  • Cast Iron 200
  • SIL 200
  • Rapido Road/Race 200
     

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

Specially designed with Lambretta transfers cutouts.



Piston kit, 67.50mm, 38mm crown, Race-Tour for Lambretta piston port cylinders, Honda 205, MB
  • Piston kit, 67.50mm, 38mm crown, Race-Tour for Lambretta piston port cylinders, Honda 205, MB
  • Piston kit, 67.50mm, 38mm crown, Race-Tour for Lambretta piston port cylinders, Honda 205, MB
  • Piston kit, 67.50mm, 38mm crown, Race-Tour for Lambretta piston port cylinders, Honda 205, MB
  • Piston kit, 67.50mm, 38mm crown, Race-Tour for Lambretta piston port cylinders, Honda 205, MB
  • Piston kit, 67.50mm, 38mm crown, Race-Tour for Lambretta piston port cylinders, Honda 205, MB

£ 157.96
Price: £ 131.63 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.
  • Various oversized pistons are available to repair old worn out cylinder kits.

    These pistons suit:
     
  • All Lambretta retro style Honda 205 cast iron cylinders.

Technical

  • Forged from the latest modern alloy material for 2 - stroke engines.
  • The strongest purpose made forged Lambretta piston available to date.
  • The most versatile purpose made piston for a Lambretta engine.

Development History

  • Fed up with 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, 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.
  • Piston skirt may need cutting always check with your old piston.
  • 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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Steven m on 22 Feb 2013 asked "hi ive recently bought 1 of these pistons of you for a honda 205 ive had barrel rebored what is youre recommended running in period been told 500 mls cheers"

MB Scooters Ltd replied: It can be read here http://www.lambrettaspares.com/info/lambretta/lambretta-setting-up-instructions-+165.html

Martin on 02 Mar 2009 asked "I have a question about "Race-Tour piston kit, piston ported HONDA 205, 67.50mm, MRB " Is this piston kit a straight forward re-bore and away you go or does it involve a new head etc? and how much?"

MB Scooters Ltd replied: You would need a reprofiled head.

Also, due to the differences in crown heights on these pistons, you would either need to get the barrel shortened or use a longer rod with a packer plate.

If you are looking for a good piston to use then just use one of the normal spec racetour pistons.

These Honda spec pistons are only really designed to bring old barrels back into use.

We did quite a few honda 205 conversions and the lack of oversizes meant there are a lot of barrels sat on peoples shelves.



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