American Motorcycle Dealer AMD 235 February 2019

Feuling Reaper Series Camshafts for M-8 Engines Reaper camshafts from Oceanside, California based Feuling Parts have wide lobe separations to produce very wide power bands, smooth camshaft lobe ramps that are easier on valve train components, eliminating excessive valve train noise and wear, and giving better throttle response, increased MPG, easy starting and a unique idle sound. Reaper cam series The Reaper 405 is a workhorse, producing a wide powerband, increasing torque and HP throughout the entire rpm range when compared to stock. A direct bolt-in replacement for Milwaukee-Eight engines, it can be used with stock valve springs, pushrods, lifters and exhaust. The 405 will respond well with slip-on mufflers and/or complete exhaust systems and a high flow air cleaner. Feuling recommends using free flowing mufflers with smaller cores for best lower rpm power and pull. PARTS AND ACCESSORIES The valve lift open close duration at 50” lift and TDC lobe centerline is .395 4 ATDC 24 ABDC 200 .068 103 for the intake and .405 36 BBDC 11 BTDC 205 .049 108 for the exhaust; the rpm range is 1,700 - 5,700 with an overlap of 7. The Reaper 465 is an accelerator, producing solid bottom end performance with substantial gains above 2,800 rpm when compared to stock. This direct bolt-in replacement for Milwaukee-Eight engines can be used with stock valve springs, pushrods, lifters and exhaust. It too will respond well with slip-on mufflers and/or performance exhaust system and air cleaner. Use of performance valve springs is not required but may result in a quieter, smoother running valve train. This cam will also respond well with increased bore and/or compression. The Reaper 521 cam is described as having “aggressive pulling power with a satisfyingly “nasty” sound and will shine in 114” and larger cubic inch engines with added compression ratio.” Feuling says that ported cylinder heads are not required, but that they will complement the cam and add even more pulling power throughout the range and that the stock throttle body produces an excellent powerband; use of a high flow throttle body may increase peak power numbers. A high flow exhaust system and air cleaner is highly recommended for optimal performance. Feuling also recommends matching this cam with its Race Series oiling system and says that high lift valve springs are required on stock cylinder heads, but that SE cylinder heads already have high lift valve springs and do accept the 521 grind cam; heavy duty one-piece pushrods are also highly recommended. The 508 cam, ‘The Grim Reaper’ (also for aggressive pulling power with their hallmark “nasty” sound), revs up faster than the 521 grind, sounds nastier still, and pulls harder but is more difficult to tune, Race series kit

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