128ci Road King S / APE Stump Puller / Build / Dyno / Test Ride

Starting with a trued & welded crankshaft, this build is designed for the customers individual needs & wants out of the bike. Wanting to do more track days & adding a little more grunt down low through to the mid range.

The Crankshaft used starts life a stock Harley-Davidson unit, before it is trued up to under 2thou of run out, an oversized big end bearing is installed & a crank 'Plug' is used over the factory Pin. Finally it is welded into place to prevent movement under harsh conditions.

I remove the S&S 475 Camshaft previously installed by me when the original build took place & I install the A.P.E CR483 Cam. New cylinders & pistons were installed for good measure to give the engine a new lease on life.
I also added the Fueling OE+ Camplate to ensure enough oil would be passing through it the critical components of the engine under high rpm demands on the track. A Fueling Cam chain tensioner was thrown in to complete the cam chest.

For the intake manifold, a Screamin' Eagle 55mm unit was fitted with A.P.E 6.2gps injectors.
Screamin' Eagle High Capacity lifters were installed & the Screamin' Eagle adjustable pushrods were re-used to complete the build.

If you have any other questions please leave them in the comments. I read all the comments & try to get back to them as soon as I can.

Please remember guys, I try to keep the video's as entertaining & flowing as possible so if you don't see a certain procedure done or you think I haven't done something it's most likely because I have left it out of the final video on purpose to keep it flowing.

All engines I build are heat cycled numerous times before dyno tunes & carried out. You may notice that between me building the engine & tuning it, I have actually got a hair cut which would indicate some amount of time has passed between scenes.

Final numbers produced on the dyno were 125hp &147ft/lbs

Camshaft: https://cycle-rama.com/

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