150+HP / 128ci / Lowrider S / 10sec Passes / APE

After arriving in Gladstone to Harbour City Harley & Alpha Performance Engines HQ I was able to finally complete the tune on the 128ci Lowrider S.
Where I live is 2200ft above sea level & where I was racing is at sea level so it made perfect sense to tune the bike there. I gained 15hp!!!
The difference in air pressure has a huge effect on high performance engines. It all comes down to air density!!!!

I was very happy to be able to come straight out of the gate & run consistant 10.6 sec passes at 123mph. I know once I have a little more time on the bike I will easily go quicker, aiming for 10.49. Still running stock suspension & factory tyres, foot shifted, hand clutch ect, fully street trim H-D Lowrider S.
Bike runs & rides just perfectly on the street, does not get hot, does not do anything silly until you open the throttle!

I will be spending more time on the bike at Willowbank Raceway in the coming weeks as I edge closer to my PB of a 10.49

Bike is running a ALPHA PERFORMANCE ENGINES 128ci Kit, Cylinder heads are by A.P.E & feature a hand ported & flowed, D&D Fatcat 2 into 1 removes the spent combustion gases while the cyclerama 530 gives the valve train stern orders to follow.

Unboxing & build video:
   • 128ci Harley-Davidson Lowrider S / Un...  

Lead up to final tune video:
   • Lowrider S / New Hi Flow Air Filter /...  

9sec passes from Mark found here:
https://www.facebook.com/watch/?v=294... PERFORMANCE ENGINES Website: www.alphaperformanceengines.com.au