zaterdag 27 februari 2016


In 2012 I owned a BMW R1100S Boxercup
It was a special edition from BMW Dealer van Harten and had the number 57.
There was a special exhaust system on it from Stainetune, a Rapidbike module and a K&N air filter.
Also some cosmetic work was done.
If you click “here” you can read all about it.

I had some great fun with this bike and always regretted selling it.
2 weeks ago I had the opportunity to buy one with low mileage and of course took it.

BMW started racing in a special class and used a tuned R1100S for this purpose.
This Boxercup replica was only build in 2004, there was another Boxercup replica version in 2003 but that one looks different from the 2004 model and is called the Randy Mamola Boxercup replica.
There was some difference between the replica and the original R1100S model:
First of all of course the colour.
The BCR had twin Laser under-seat exhausts, braided brake lines, carbon-fibre cylinder head protectors, a carbon-fibre oil-catcher bellypan, uprated Öhlins suspension, and a shorter paralever torque arm which raised the rear end to quicken the steering and increase cornering clearance and a wider rim on the rear wheel.

Boxercup race bike

So how to tweak this replica a little bit?
First of all I got a Laser racing exhaust system which is still being made by Laser Exhaust Systems 
On the replica there is a street legal exhaust system and it is actually a two into one system.
This racing system, a two into two, sounds superb, with a deep and almost offensively loud exhaust note. Still availiable. laserexhausts

LaserExhaust system in total 7.0 Kg

Original BCR Laser exhaust 13.6 kg

To get some more air into the combustion chamber I installed a K&N air filter and a  Boxer Performance Carbon Inlet Duct. 


Boxer Performance Carbon Inlet Duct

Boxer Performance Carbon Inlet Duct

Now there is a nice flow through the engine so I will install a Stage 9 Chip into the ECU (specially made by John)

Unfortunately the Chip didn’t work for me.
The bike was still running to lean.
I made an appointment in Goes Tovami Dynojet
They installed a Rapidbike

As you can see in the chart the bike was indeed running way to lean for now 102 Hp and 107.3 NM but more important the air fuel ratio is perfect.

So this is how we start working on this bike:

It has driven only 30.000 km but since it is from 2004 I will give the bike a 40.000 km tune up including the change of the V-belt (60,000 km)
So change all the filters (incl. fuel)
Oil change (engine, gearbox, rear axle, brakes and clutch)
Motorex Boxer 4T SAE 15W50 / Motorex Gear Oil Penta LS 75W140
New sparkplugs (BRISK PREMIUM Sparking plugs)
Air filter (K&N) 
Adjust the valve clearance.
2 x new injectors as in R1200 Series, same flow, dynamically matched, multipoint criteria from TILLS

Cleaned up the front fork and put on a new full carbon front fender from with the use of all new stainless steel bolts and nuts.


Some pictures from the Web:


Also See: