This bike has become something special, and in my opinion deserved a special power plant. The stock Raptor 3 wasn't quite cutting the mustard for me anymore, and issues with my Dover Power motor has unfortunately put that build on temporary hold, so some of it's parts were scavenged to finish this Raptor 4. This is an all new Briggs Raptor 4 block from Dyno Cams, painted in my favorite Briggs color, Ice White.
Ported and polished with an ARC billet rod and flywheel, .020 copper head gasket, new stock valves with 22lb springs and the WKA reg camshaft and head from the Dover Power motor. The crankshaft and dual bearing side cover were also robbed from the Dover Power motor, along with the custom old school housing/new(er) school cup style recoil starter Dan had put together. Just blasted clean in preparation for matching powder coating soon to hit the frame. It's got the brand new Raptor gas carburetor I had originally bought off eBay for the Dover motor, (before deciding to try the "Chi-kini" carb) on the tank and beefy support bracket once filled with methanol also from the Dover motor. The Robertson's Torque Tubes 4 stage header and Modified RLV muffler is being utilized for now, but might either be switched for an all new pipe, or traded for my open Raptor header as the frame was built with that angled pipe in mind. But, someone's gonna call the po's on me if I don't run a muffler on this. Compression is right around 10:1 and it dynoed just shy of 12HP at 5,500RPM but falls close to 9 at around 6,500RPM. She cracks hard, and should be a lot of fun. Thanks to Dan at Childish Concepts Racing.
:smile:
