Piston kit, 68.50mm, 38mm crown, Race-Tour for Lambretta piston port cylinders, Honda 205, MB

6850PP38LH

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 - 68.50mm
  • Engine size - 205 - 210
  • Induction type - Piston port
  • Piston crown height - 38.00mm
  • Piston dome - 2.5mm
  • Skirt - 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 machined with Lambretta transfer feeds.



Piston kit, 68.50mm, 38mm crown, Race-Tour for Lambretta piston port cylinders, Honda 205, MB
  • Piston kit, 68.50mm, 38mm crown, Race-Tour for Lambretta piston port cylinders, Honda 205, MB
  • Piston kit, 68.50mm, 38mm crown, Race-Tour for Lambretta piston port cylinders, Honda 205, MB
  • Piston kit, 68.50mm, 38mm crown, Race-Tour for Lambretta piston port cylinders, Honda 205, MB
  • Piston kit, 68.50mm, 38mm crown, Race-Tour for Lambretta piston port cylinders, Honda 205, MB
  • Piston kit, 68.50mm, 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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Dom on 19 Dec 2011 asked "If I wanted to fit this piston to my Honda 205 converted barrel is this a straight fit or do I have to modify anything, Cheers"

MB Scooters Ltd replied: These come with a standard Lambretta shirt length if you were to use it with a 110mm rod. To use it witha 107mm standard rod then the piston needs shortening to suit your set up now.

Paul d on 25 Jul 2008 asked "I have a question about "Racetour piston, 68.5mm, piston port, honda 205 type" will my head need reprofiling? and will the piston be a straight swap once you rebore the barrel?"

MB Scooters Ltd replied: Yes you will need to have a head reprofiled to suit the larger piston.



The piston may need shortening to suit your original piston.



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