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MrB Bay

6mm Plain Nut Stainless Steel
£ 0.12 £ 0.14
( Ex Vat: £ 0.12 )
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Cylinder head 125 - 250, without cowlings, centre plug, MRB


This is our special heat treated aluminium cast, centre plug head.

It is designed to fit without a head cowl.

As using this head makes your engine effectively only cooled while you are moving it is only really suitable for use when racing or sprinting, unless you live on a motorway and never ever get stuck in traffic!

These have been used many times on high powered road engines with no ill effect, because the size of the head cools better.

Access to the plug can be tricky making this head not 100% practical for a road going scooter, remove the rear shocker to get easier access.

These heads are machined to order so we will confirm specification with you when you order.

It can be machined to suit any 125 / 150 / 175 or 200 casing.

This is no an MZ head it is a MRB head there is a difference.

Designed by Mark Broadhurst, this is a product from the MRB racing background.


 Cylinder head 125 - 250, without cowlings, centre plug, MRB
MRB0241K
£ 187.38
Price: £ 156.15 Ex Vat
   Quantity :


 
 

Features

  • Fits either small or large block cylinder studs.
  • Heads to fit with cylinder head cowls or without.
  • Anti warp heat treated heads.
  • Unlimited head compressions can be obtained.
  • Unlimited squish band size can be obtained.
 
 

Technical

  • Designed by Mark Broadhurst
  • Made from modern heat treated aluminum.
  • Machined for accurate stud to cylinder bore centralisation.
  • Machined to give perfect squish clearances.
  • Air cooled with cowls.
  • Air cooled with out cowls
  • Liquid cooled.
 
 

Development History

  • MRB have been making special cylinder heads for many years.
  • This development has produced the strongest heads available.
 
 

Reasons to Buy

  • Precision made.
  • Stronger.
  • Easy fit.
 
 

Tips

  • Always check squish clearances upon assembly.
  • Always make sure the head is centralised to the piston.
  • Always torque the head bolts to 18-20 lbs ft.
  • Re-torque the head nuts at 500-600 miles
  • Always use MRB special cylinder stud, nut and washer kits.
 
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Ask a Question?

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Richard G on 18 Jun 2008 asked "I have a question about "Cylinder head 125 - 250 without cowlings centre plug" I would like to order one for a race bike running an RB22 but was concerned about squish etc. What do you normally recommend and how long would it take to get it delivered? Many thanks Rich G"

MB Group, Serious Outdoors Ltd replied: It all depends on what you want, ideally aim for 1 -15mm squish clearance.

I would use no head gasket, which will give what seems like well over the top port timings but this will give maximum power.

We can aim for a good compression ratio but always comes down to the customer and how the engine is finally set up.

These heads are usually done within a week when we know your requirements.

 


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