Perfect Twin Project

The Perfect Twin Project bike was built as a showcase for the Perfect Twin Performance engine rebuild/blueprint technique. The goal was to build a V Twin using stock '85 HD Evo cases. Blueprint everything to the max. and use the best the aftermarket had to offer to make a strong and reliable engine that would be good for at least 150.000 troublesome miles. The bike and technique articles were published in motorcycle magazines worldwide.

The Perfect Twin Performance website ran for 15 years, but was discontinued in autumn 2023.  For most potential customers the cost/time to rebuild their engine was too high/long/complicated and they opted for purchasing  cheaper new (aftermarket) engines, not realising they were going to buy the same problems the orig. engines came with.  For those interested in some serious pre Milwaukee 8 combustion engine modifications here the screenshots from the now defunctional PTP website:

Additional Info:  Reinforced and redesigned customized crank cases, Engine totally re-engineered (blue printed: every engine part measured, re-aligned, straigtened & machined to fit with the lowest possible tolerances of free play). Engine assembled with 90% fluid gasket material, Special re machined S&S HVHP oil pump with 1.5 :1 ratio pump gear and longer flex free pump drive axle with bearing in custom PTP pump cover. Truett & Osborne flywheels, S&S/ PTP Supreme con rods, restrictor free S&S crankshaft with Jims crank pin and PTP custom con rod/crank pin bearings, Ross racing pistons with twin cam wrist pins, Power Seal Nikasil cylinders. Heads welded in PTP style bathtub combustion chamber & Singh groove, Kibblewhite custom valves (smaller in, bigger out), ported & flowed, PTP cam, Kibblewhite extra strong cylinder studs, Crane needle bearing rocker rollers, Crane time savers, NOS nitrous system, S&S Super E carb with Da Vinci atomizer, Denso Irridium IW 16 spark plugs. pipes: PTP/ Supertrapp, custom made primary: PTP/ Belt Drive LTD. Fuel pump for NOS in primary, ART hydraulic clutchcover, Barnett Scorpion clutch, Kick start only adapter for 5 speed, oil tank: PTP, Gas tank: Super glide/ PTP, Fenders: polyester, Electrical: PTP minimal, One off Fournales shocks, NOS electrics in empty start motor, Saddle: PTP, Goodridge oil cooler en brake/ oil lines, PM controls , many hand made brackets and engine parts. 85% of bike can be disassembled with a set of Allen key and a Bahco. Bike is ridden daily.