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Crankshaft, 58x110mm, Gp, full circle race with small end bearing, MRB

£ 395.23
( Ex Vat Price: £ 336.37 )

Part Number
MRB0601K
Crankshaft, 58x110mm, Gp, full circle race with small end bearing, MRB
Click image for a closer look

The MBD Race-Tour crankshaft is probably the best crankshaft ever made for a Lambretta (and it is unlikely a better crankshaft will ever be made).

There is over 20 years of testing and development to produce these top quality crankshafts.

Our crankshafts use Japanese Road-Race type con rods and full race spec big end bearings with a slightly longer con rod length of 110mm.

They come from a bike that revs well over 10,000rpm and gives 50+ horse power, well within any Lambrettas potential.

The longer con rod gives an advantage to set up your Lambretta engine using our variable thickness cylinder base packing plates allowing adjustment to cylinder port timings and cylinder head clearances making for a better more efficient powerful engine.

The advantages of the MBD Race-Tour crankshafts are:

  1. A full circle, high compression balanced crankshaft giving a smoother more powerful engine.
     
  2. Con rod and bearing well within any power outputs of a Lambretta, Road or Race.
     
  3. Tighter assembly clearances preventing crankshaft twist.
     
  4. This crank has a standard stroke of 58mm and comes with the best small end bearing available.
Shop Category: Crankshaft spares
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1. MRB0201 Crankshaft drive side pulling sleeve, MRB £ 16.69 (Ex vat price: £ 14.20)

There is no point spending money on a crank that has been checked for alignment then going and hitting it...Crankshaft drive side pulling sleeve, MRB Add :

2. MRB0510 Crankshaft extracting tool, MRB £ 14.10 (Ex vat price: £ 12.00)

We were seeing a lot of damaged cranks where people had resorted to hit their cranks with a hammer to...Crankshaft extracting tool, MRB Add :

3. MBP0236K Gp200 Bearing upgrade kit, includes bearings, seals, gaskets, screws and drive plate, MRB £ 78.27 (Ex vat price: £ 66.61)

This kit contains all the parts you would need when changing your crank to one of our Alpha cranks or...Gp200 Bearing upgrade kit, includes bearings, seals, gaskets, screws and drive plate, MRB Add :

4. MBL1281K GP flywheel nut and washer £ 2.69 (Ex vat price: £ 2.29)

Gp flywheel nut and washer bought as a  set....GP flywheel nut and washer Add :

5. MBB0076 Small magneto seal £ 2.31 (Ex vat price: £ 1.97)

A high quality small magneto or flywheel seal.    Fits all Series 2 and 3 magneto housings but not Series 1 models.    It's...Small magneto seal Add :

6. MBB0051 Drive side seal £ 3.06 (Ex vat price: £ 2.60)

A high quality drive side seal.    TOP TIP, Always grease and oil the drive side shoulder and seal and spin the crank...Drive side seal Add :

7. MBP0189 Magneto gasket, 0.5mm thick £ 1.08 (Ex vat price: £ 0.92)

Made for us to original designs this is a magneto housing gasket for any Series 1, 2 or 3 Lambretta....Magneto gasket, 0.5mm thick Add :

8. MBL1358 Drive side halite gasket £ 0.96 (Ex vat price: £ 0.82)

Made for us to original designs this is a drive plate halite gasket.    It fits between the drive bearing and casing...Drive side halite gasket Add :

9. MBP0085 Drive side plate, steel, MRB £ 10.79 (Ex vat price: £ 9.18)

Alloy drive side seal plates are much lighter than steel plates but do tend warp. Our steel plate are slightly redesigned...Drive side plate, steel, MRB Add :

Features

  • Hardened.
  • Lightened.
  • Balanced.
  • Precision made with increased crank pin tolerances.
  • Uses Japanese Yamaha 110mm con rods
  • Uses Japanese racing big end bearings.
  • Uses wider crank webs.

Technical

  • Designed by Mark Broadhurst and manufactured in the UK by Alpha bearings made from solid modern steels.
  • CNC machined.
  • Precision ground.
  • Assembled to exact tolerances.

Development History

  • Mark Broadhurst has been at the forefront of uprated crankshaft development from 1985.
  • He has invented and made every known con rod conversion.
  • These modified crankshafts include Innocenti, MDP, MEC, Omega, Mazzucelli, SIL, Evergreen and AF.
  • This long period of development found problems with every one of these crankshafts to where we needed a more reliable product.
  • It wasn't until SIL and Italian manufacturers moved from 22.9mm crank pins to 22mm crank pins that other dealers copied our ideas.
  • The amount of work load and never ending crank web failures forced us to design our own Race-Tour crankshafts.

Reasons to Buy

  • Balanced.
  • Lighter.
  • Precision made.
  • Using Japanese con rods and racing bearings.
  • Longer con rods mean more versatility when setting port timings and squish clearances.

Tips

  • Always use new drive and flywheel bearings when fitting a crankshaft.
  • Always use new seals when fitting a crankshaft.
  • Fit a crankshaft using a drive side pulling sleeve.
  • Oil the big end bearing, shims and seal surfaces before fitting.
  • Spin the crankshaft as you pull it into the drive side bearing.
  • Once fitted turn the crank to make sure it spins free.
  • Make sure there is more than .025" clearance between crank webs and casings.
  • We sell 0.5 and 1.0mm mag gaskets to obtain clearance.
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Ask a Question?

If you would like to ask us a question about this product, please feel free to click here to Ask a Question

1 Alessandro on 10 Sep 2008 asked "I have a question about "Crankshaft 58x110mm Gp full circle race with small end MBD":Hi Mark,how does it work with a small block mugello 186?Regars,Alex"

Mark replied:

It should work perfect, you will need a cylinder packing plate as the con rod is 110mm longer that standard but works perfect.

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