New cylinder heads R51/3 – R60/2

Our price of these cylinder heads is higher than the price of other suppliers, for the following good reasons: 1. The valve guides are checked and reamed if needed. Some guides require upto 0.02 mm reaming.  Without these adjustments, the valves would get stuck quickly. 2. We install rotating valves from Intervalves Switzerland, top quality valves. 3. The cylinder head mating surfaces are flattened in case of visible/palpable edges in the mating plane or “curved” surfaces. The depth of the mating surface is measured, to make sure that the height of the collar on the cylinder does not exceed the
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Turn signal switch & switch support

Turn signal switch with P/N61318048152AM will only fit with switch support with P/N32722072175. The original Magura switch support is too high, so the switch does not connect properly to the switch support. This leaves an opening visible.                              

Exhaust pipes comparison R25, R25/2, R26, R27

Without direct comparison, it can be difficult to distinguish the difference between the R25-R25/2, R26 and R27 exhaust pipes. This photo shows how you can easily determine the type of exhaust pipe:   The R25, R25/2 exhaust pipe is significantly longer at the straight end than the R26 exhaust pipe:

R51/3 – R68 Throttle assembly – sliding block design

For unknown reasons, the supplier of the after-market throttle assemblies for the R51/3 – R68 models (pn 32722072350), has decided the modify the design of the sliding block. The old sliding block used to have recesses to hold the cable ends, the new version does not. While in the new version the cables cannot “escape” either, the cable ends can rub against the inside of the throttle body causing unwanted wear. We therefore remove the new sliding block from the throttle assembly and add the correctly designed older sliding block. This however increases the price of the throttle assembly.  
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Pistons aren’t round

An article that explains why pistons aren’t round. Click on piston to open it:

Saddle Y-frames R25/2 – R27 and R51/2 – R68

  4 versions of the saddle Y-frames are available: P/N 52 51 7 002 164:   R51/2 – R68      with 8 mm holes for saddle bearing bolt 52 51 7 002 125.7 P/N 52 51 7 002 165:   R51/3 – R68      with 10 mm holes for silent block 52 51 7 002 141 P/N 52 51 7 002 115:   R25/2                 with 8 mm holes for saddle bearing bolt 52 51 7 002 125.7 P/N 52 51 7 002 116:   R25/3 – R27      with 10 mm holes for silent block 52
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Wiring diagram R51/2

BMW R51-2 Wiring diagram B&W  (click for larger image)    

Side stands for EU and USA models

There is a clear length difference between the side stands for the R50 – R69S models and the R50US, R60US and R69US models (due to different configurations of the front fork) These are therefore not interchangeable.

Installation instructions 12V dynamo system VAPE

Click here for installation instructions 12V dynamo system VAPE: Dynamo System 70 80 499 0XX

Rim width

The width of rims can be measured in 2 different ways: the inside or the outside. This means that one and the same rim can be indicated both in (for example) 2.15 “and 3.08″ WM2: inside 1.85″ (47 mm) outside 2.72″ (69 mm) WM3: inside 2.15″ (55 mm) outside 3.08” (78.2 mm)      

Sound of open mufflers on a BMW R51/3

Just can’t get enough of the sound of open mufflers

Repair part for R51/3 – R68 half hub wheels

We now offer a top quality wheel hub repair part (PN 36312030026.7) for the R51/3 to R68 half hub wheels – splines have a perfect slide fit with the original BMW driving dog (PN 33120026232) – the HRC value of the repair part is between 30 to 34, measured at the splines. An original wheel hub measured 29 HRC – the repair part has the appropriate alternating recesses for the spokes, both on the front and back side of the flange:    the recess for the spoke head is deeper and has a concave shape, whereas the recess for the spoke bend
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