ER-6/Ninja 650 Engine Tuning
If you've read any of the 95Racer blog or browsed through the 95Racer gallery, you'll be aware of the amount of work that has gone into that project. And, of course, it wouldn't be any good with a strong, powerful engine.
The present state of the engine is summarised in the dyno chart below. While we are continuing to make small refinements, we are quite happy with all aspects of it:
| Driveability | This is not at all a peaky engine. It makes upwards of 40 lb-ft of torque from 5000 RPM all the way to redline, and near 50 lb-ft from 7500 RPM to redline. |
| Peak Power | Our goal from the outset was a headline power figure of 95bhp at the rear wheel, and that has been reached |
| Service Interval | If you're planning on doing a full race season, you will need an engine refresh during the season. This will be a valve service, and general inspection of all rotating components |
| Reliability | Aside from a failure at the very beginning of the development process, which was due to bad workmanship by an outside vendor before we took control over every aspect of the development, we have not had any failures. |
In brief, the list of modifications include:
- Revised intake and exhaust cam profiles to our own specification
- Revised valve springs and preload spacers
- Extensive cylinder head porting and flow optimisation
- Bespoke exhaust system
- Revised intake manifold
- Enlarged throttle bodies and inlet trumpets
- Bespoke airbox and ramair intake system
- Lightened, polished, and re-balanced crank
- Removal of balancer shaft and addition of electric water pump
- Increased crank case ventilation
- Reworked standard pistons and conrods
- Lightweight flywheel and race generator
- Slipper clutch with oil feeds
And here is some photographic evidence of the work.
Due to the many possible combinations of engine modifications and output power, it is best to speak directly to us about your specific goals and requirements in terms of engine performance. However, we believe that this is the most capable engine ever developed from the venerable Kawasaki ER-6. We have seen and heard plenty of wildly exaggerated claims on horsepower, and with it just as many disappointed owners. We dare say, you won't disappointed with this one!