Product Description
Yamaha YZF-R6 5SL Model.
This is the complete race generator kit including the lightweight flywheel, machined Yamaha generator cover, generator cover gasket, stator, mounting plate, cup fasteners, connectors and specific regulator / rectifier.
This kit comes with a generator cover machined to take the race generator so that you can swap the race kit for the original and back easily.
Significantly lighter than standard, offering higher output than 'race kit' versions, providing increased throttle response,less gyroscopic forces and more bhp everywhere. It is designed to fit high performance injection engines, and as a replacement for standard alternator systems.
Typical gains on a standard bike are around 4-5bhp and generally the higher the state of tune of the bike the greater the gain.
If you order this kit, you need to tell us if it is a 5EB or 5SL model, the only difference is the cover, everything else is the same. If you have spare covers, we can machine these to take the race generator, either 5EB or 5SL.
With fuel injected bikes the option to run a 'total loss' system has become impossible, due to the drains from fuel pumps and injectors. Bikes with carburettor suffer the same problems, with battery voltage dropping on a total loss system, and obviously spark quality towards the end of a race. The standard alternators are designed to run headlights etc and need to be able to supply significantly more power than you will ever need on a race bike. This means you can use a considerably smaller system, reducing the weight of the crankshaft assembly.
Most race kit generators have a smaller rotor with less windings running single phase in the stator so that they produce less outright power (and accordingly take less power from the crank to generate the electricity), and use a standard reg/rec.
The problem with this is that you have to rev the engine quite hard to produce any useable power and any excess electricity created is still converted to heat in the reg/rec and thrown out the back of the bike.
Our generators also use a small rotor but our windings are 3 phase and have a lot of turns of fine wire. This allows us to provide strong and consistent power at lower revs, but the clever part is in the reg/rec. The reg/rec contains a switching system which cuts the generating power when the desired voltage is reached and therefore the power is not taken from the crank to convert to unwanted electricity in the first place. This is why our reg/recs run much cooler than standard models and why you cannot use our generators with a standard reg/rec as the generator would be under load all the time creating excessive heat in the windings.
Please note BDK race generator kits are for racing purposes only and not designed for high draw systems with lights etc. (road machines). The kits are designed with performance riding in mind and will not charge below approx. 4500RPM, this is the trade-off you get for more power elsewhere.
