About

BOXER PERFORMANCE was acquired by Swiss company WYSS MOTOS SERVICES in 2024. We will continue to offer what is still the best modification, in terms of quality/price/performance ratio, you can make to your 4-valve BMW motorbike from between 1994 and 2009.

Let yourself be tempted, these sprockets have been famous in the English-speaking world for over 20 years. To see for yourself, type lennie’s rocket sprockets into your browser.

Contact and Buy

Phone & WhatsApp: +41 (0)79 446 11 46

email: motosservices.ch@gmail.com

FAQ

Where can I buy these sprockets?
Here is the one and only place to buy them.
Can I install these sprockets on my bike?
Yes, if your bike is a BMW R 850, 1100, 1150 or 1200 SOHC from 1994 to 2009.
Can I install these sprockets myself?
If you know what TDC and valve timing mean and carefully follow the installation guide instructions, you will be able to install these sprockets yourself. Otherwise, seek assistance from a competent person.
Is the sprocket installation complicated?
Not at all, as long as you’re meticulous. If you’ve already done maintenance on your motorcycle like valve adjustment, the installation guide with its large photos will provide all the information you need.
How long does installation take?
For the first time, expect between 3 and 4 hours for a careful installation.
Can I install these sprockets alone?
Most of the time yes, but you’ll need help for loosening/tightening the sprocket bolts. For the 1200 models, it’s recommended to work with a friend.
Will I receive a guide to explain the installation?
Yes, you will receive a pdf file with photos to help you install the sprockets.
Do I need to modify my bike’s injection or exhaust?
This kit is truly « Plug and Play ». You’ll get full results without having to modify the ignition, injection or exhaust.
Will these sprockets resolve the surging issue?
Yes, regarding there is no other issue, sprockets and a fine tuning after installing them could resolve it most of the time.
Is there any risk in mounting these sprockets?
None if your engine is strictly original and if you scrupulously follow the operating instructions. If you have changed the camshafts and pistons, check thoroughly before starting the engine.
Are there different models?
There was, twenty years before at the beginning, but now since more than 15 years, there is only one model. The one you can get here.
Do you recommend to change the left cam chain tensionner in the same time?
Yes, as you have to remove it, it’s a good idea to change it. We have a special offer, sprockets and an upgraded cam chain tensionner which comes with a free o-ring for the throttle body.
Can I install these sprockets on a BMW R 1200GS DOHC from 2010 and later?
No, this kit only fits SOHC engines.
Can I return to my bike’s original setup?
Yes, without any problem, just remove the sprockets and reinstall the original ones.
Can I return the sprockets if I’m not satisfied?
Yes, provided it’s received in perfect condition. Return shipping costs are the sender’s responsibility.

Technical

Technically, for the engine, it’s a modification of the valve timing, which is clearly optimised from the factory for the stretches of German motorway where speeds are still unlimited. Before VVT, or Variable Valve Timing, when designing an engine, engineers always had to choose between favouring medium and high revs, or medium and low revs. At BMW, they logically chose the first solution. The one on offer here will favour low and medium revs, where we all drive most of the time in reality. You will feel the torque 800 to 1,000 rpm lower, depending on the model, giving you better acceleration not only on straights but also out of curves, when overtaking or driving with your passenger. You will even save on fuel consumption, because at a given speed, you’ll be in a higher gear, so the engine will turn less quickly. You will really get the feeling of riding a new bike, and enjoy it even more.

These special LRS sprockets, CNC-cut from high-grade steel, are designed to modify the valve timing on BMW Boxer R 850, R 1100, R 1150 and R 1200 engines until 2009. This shift in valve timing moves the maximum torque speed down by 800 to 1,000 rpm, depending on the motorcycle model. As a result, maximum torque is increased to engine speeds that are much more common in everyday driving, and engine response at low and medium engine speeds is significantly improved.

Another interesting aspect is that fitting these sprockets also takes up the slack caused by normal wear of the timing chain. For those who want to keep their bike, it’s also insurance against an operation that won’t have to be carried out for a long time, and which is very expensive: opening the engine to change the famous timing chain.