Harley-Davidson Ultra Limited 107″ with S&S 475 cam – a rather surprising transformation.
The Harley-Davidson Ultra Limited presented in 2017 officially begins the era of the new Milwaukee Eight (M8) engine. In in press releases Harley-Davidson writes this words: “The Ultra Limited motorcycle has more of everything touring riders have come to expect: rich Harley-Davidson styling, more long-haul comfort and convenience, and more function and performance. It’s a step above the rest, on all the kilometres ahead”.
It would be hard to argue with that, because in addition to the great new engine, H-D has also made a lot of improvements in terms of comfort, handling and rideability. For example: front and rear suspensions. Front suspension uses Showa Dual Bending Valve technology and gives to owners 117 mm of travel; bigger pistons improve dampening performance over the range of suspension travel. Hand-adjustable emulsion rear shocks provide 15-30% more preload adjustment and adjust with the turn of a single knob, no tools required; new bigger pistons improve damping performance over the range of suspension travel.
An undisputed queen for medium and long range travel, both solo and with a partner.
In this post we would like to highlight the potential of the M8 engine and, immodestly, the tuning capabilities of our DynoJet Tuning Centre. For this purpose we will show a comparison between a stock engine and the same engine equipped with an oversized air filter, 2:1 exhaust and S&S 475 cam.
In this Stage II an increased oil pump kit and support plate have also been installed in order to increase the overall reliability.
Engine tuning was done on a DynoJet 250i dynamometer in the P.M. Moto headquarters in Fiumicino with Power Vision.
What follows is the dyno chart that contains the comparison between the Ultra Limited 107″ before and after the “cure”. Any comment would be superfluous.