Let 25+ Years Of Harley-Davidson Performance Engine Building Work for You!
(315) 495-6650 M-F, 8-5, EST.

Engine Kits

Hillside Cycle shall have no obligation to warranty engines used in racing or other similar competitive events. Hillside Cycle shall have no obligation whatsoever to warranty any engine equipped with turbochargers, superchargers, nitrous oxide, or any other power-adder devices.

***PREDATOR SERIES ENGINES COMING SOON!!!!***

Folks, these are examples of what you can have, as the “cookie-cutter, crowd-follower” combinations are really not the norm here whatsoever.

Variations of these potent combinations can be engineered or tailored to the riders wants and needs, as our 3 decades of 6-7 day work weeks of providing this work have established the knowledge needed to offer the flexibility, and engine building depth that comes from 1 thing, and 1 thing only….EXPERIENCE.

Call us at 315-495-6650 M-F, 8-5, EST.

74” IRONHEAD SPORTSTER
80” SHOVELHEAD KIT
93” SHOVELHEAD (TOURING)
103” SHOVELHEAD (HOT ROD)
116” TWIN CAM
107” TWIN CAM
95” TWIN CAM HOT ROD
95” TWIN CAM TOURING
96” EVO
89” EVO
80” EVO
107” EVO
124” EVO
113” SNIPER
EVO XL CONVERSION 888-1200
1200 EVO XL PRO STREET

Hillside Cycle Engine Break-in Procedure’s
1st, bring the engine cylinder temp to 150 degrees, via use of a laser heat gun, 3 times, after complete cool down each time.
Now you can ride it for a 5-7 mile period, then a 10-15 mile period, then a 20 mile run.
The first 50 miles is the most critical for new ring and piston break-in.
Most engine damage can occur during this period, so take it easy and avoid the urge to spool it up, keeping excessive heat out of the ring pack, and pistons.
Keep the engine heat down by not exceeding 2500-2800 rpms.
Also vary the engine speed, but do not lug the engine.
(Shovel/Iron XL owners will want to re-torque base nuts and cylinder head bolts at this time.)
Next 500 miles more liberal with the throttle, running it up to 3500-3800 rpms, and do not lug the engine.
For the rest of the 1000 miles, continue to vary the engine rpms, and you can be much more liberal yet rolling up to 4500-5000 rpms.
Once this point is reached,(1000 miles) you can let the badger loose now!!!