Milwaukee-Eight Chain Drive Camshafts by Feuling Parts

Which Reaper Chain Drive Camshaft Is Best For You?

Feuling Parts make a great range of Camshafts for the 2017up Milwaukee-Eight with different Grinds.  So, how do you know which grind is the best fit for you and your bike?

Here is a summary of your different options with the basic specs and additional info on related parts that may be required depending on your selection.

Read through the full article to get a better understanding of which one will best suit you.  Going bigger isn’t always better and it may be overkill for the way you really want your bike setup.

If you’re using your bike as a daily drive or just weekend cruising then you’ll want a different setup than someone aiming to get the max performance while smashing the limiter.

The following is a summary to help you decide which is best for you. If you have any questions then give us a call on 07-3252-5381.

465 Reaper Chain Drive Camshaft

The 465 Reaper 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 M8 engines can be used with stock valve springs, pushrods, lifters and exhaust. It 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 bo re and or compression.

SPECS:

RPM range 1,850 – 5,950. Grind: 465

Intake: .445 Valve Lift, 4 Open, 23 Close, 207 Duration @ 50, .100 lift @ TDC, 99.5 Lobe Centerline

Exhaust : .465 Valve Lift, 50 Open, 6 Close, 236 Duration @ 50, .100 lift @ TDC, 112 Lobe Centerline

Overlap: 10

PART No: FE-1343

Summary:

This is ideal for riders wanting low down pulling power. This is a real Torque Cam.

472 Reaper Chain Drive Camshaft

The 472 Reaper is a great all-around camshaft and Feulings go to for 4 1/2 stroke 114 – 117 looking for a little more than our 465 grind and wanting a bolt-in.

The 472 has a great bottom end with substantial gains above 2,800 RPM when compared to stock. Responds very well to increased bore and or compression, exhaust system and air cleaner.

SPECS:

Use of performance valve-springs is not required but may result in a quieter, smoother running valve-train.

RPM range 2,500 – 5,500. Grind: 472

Intake: .468 Valve Lift, 8 Open, 25 Close, 213 Duration @ 50, .117 lift @ TDC, 98.5 Lobe Centerline

Exhaust: .472 Valve Lift, 50.7 Open, 7.75 Close, 238 Duration @ 50, .110 lift @ TDC, 111.5 Lobe Centerline

Overlap: 16

PART No: FE-1350

Summary:

This is ideal for riders wanting more top end horsepower. Great cam for a 114ci when you like to open the throttle.

508 Reaper Chain Drive Camshaft

The Grim Reaper Aggressive pulling power with a nasty sound. This camshaft revs up faster than the 521 grind, sounds nastier and pulls harder but is more difficult to tune.

The REAPER 508 grind will shine in 114 and larger cubic inch engines with added compression ratio. Ported cylinder heads are not required but will complement the cam and add even more pulling power throughout the range.

The stock throttle body produces an excellent powerband and use of a high flow throttle body will increase peak power numbers.

SPECS:

RPM range 2,250 – 6,250. Grin d: 508

Valve Lift Open Close Duration @ 50 Lobe Centerline

Intake .508 20.5 BTDC 37 ABDC 237 .180 98.5

Exhaust .511 44 BBDC 17.5 ATDC 241.5 .146 103.25

Overlap: 38

Good cam for a SE Stage 3 Kit.

PART No: FE-1349

Note: We recommend additional parts with this camshaft for optimal performance. See “RECOMMENDED ADDITIONAL PARTS” section near the end of this article.

Summary:

This is ideal for riders with the Screamin Eagle® Stage 3 kit when looking to extend the power band.

Really pulls away from 3500RPM compared to the SE-498 Cam.

In our testing we saw a 4HP & 8TQ increase (2018 Breakout with Rinehart Slip On Mufflers)

Very ‘lumpy’ note at idle.

521 Reaper Chain Drive Camshaft

Aggressive pulling power with a nasty sound, the REAPER 521 grind will shine in 114 and larger cubic inch engines with added compression ratio.

Ported cylinder heads are not required but will complement the cam and add even more pulling power throughout the range.

The stock throttle body produces an excellent powerband and use of a high flow throttle body will increase peak power numbers.

A high flow exhaust system and air cleaner is highly recommended for optimal performance.

SPECS:

RPM range 2,250 – 6,250. Grind: 521

Valve Lift Open Close Duration @ 50 lift @ TDC Lobe Centerline

Intake .518 17 BTDC 34 ABDC 231 .162 98.5

Exhaust .521 51.5 BBDC 11.5 ATDC 243 .125 110

Overlap: 28.5

Good cam for a SE Stage 4 Kit.

PART No: FE-1346

Note: We recommend additional parts with this camshaft for optimal performance. See “RECOMMENDED ADDITIONAL PARTS” section near the end of this article.

Summary:

This is ideal for riders with the Screamin Eagle® Stage 4 kit when looking to move the powerband into a more rideable rev range.

For just a cam change in a Stage 4 kit, this is a great upgrade & a very popular one at that!

538 Reaper Chain Drive Camshaft

538 Reaper Cam – Aggressive camshaft with a nasty sound. This camshaft revs up fast and pulls hard in engines with big bore cylinders, modified cylinder heads, intake, compression and exhaust.

The REAPER 538 grind will shine in 124 and larger cubic inch engines with added compression ratio.

Ported cylinder heads are not required but will complement the cam and add even more pulling power throughout the range.

The stock throttle body produces an excellent powerband and use of a high flow throttle body will increase peak power numbers. A high flow exhaust system and air cleaner is highly recommended for optimal performance.

SPECS:

RPM range 2,350 – 5,975. Grind: 538

Valve Lift Open Close Duration @ 50 Lobe Centerline

Intake .538 20.5 BTDC 38.5 ABDC 239 .180 99

Exhaust .542 48 BBDC 18 ATDC 246 .157 105

Overlap: 38

PART No: FE-1351

Note: We recommend additional parts with this camshaft for optimal performance. See “RECOMMENDED ADDITIONAL PARTS” section near the end of this article.

Summary:

This is ideal for riders wanting a street ridable 124 or 128ci big bore kit.

592 Reaper Chain Drive Camshaft

This is the Real Mac Daddy of Camshafts designed for those that want to get deadly serious with bore size, ported cylinder heads and throttle body CAM.  This is definitely not for the casual weekend rider.  If you’re selecting this camshaft then you also need to upgrade the related parts to handle this power.

This super aggressive camshaft requires high lift and higher load valve springs, performance pushrods and lifters.

Note: The 592 grind will require checking valve to piston clearance.

SPECS:

RPM range 2,850 – 6,250. Grind: 592

Valve Lift Open Close Duration @ 50 Lobe Centerline

Intake .578 20 34 234 97

Exhaust .592 68 16 264 116

Overlap: 36

PART No: FE-1348

Note: There are required additional parts with this camshaft for optimal performance. See “RECOMMENDED ADDITIONAL PARTS” section below.

Summary:

This is ideal for riders wanting MAX HP! This is a Super Aggressive Camshaft, consult your engine builder & buckle up!

Recommended Additional Parts for 508, 521, 538 & 592 Camshafts

These aggressive camshafts require high lift and higher load valve springs, performance pushrods and lifters.

High flow air cleaner and stepped exhaust pipes are highly recommended if not already fitted.

FEULING also recommends matching these camshafts with their RACE SERIES oiling system FE-7097 or FE-7099.

High lift High Load valve springs are required, Part  SS900-0958

Heavy duty pushrods are highly recommended, Part FE-4087

Feuling HP+ Performance Pushrods

0.165in. Wall thickness, One piece (non-adjustable), Eliminates pushrod flex

-Reduces valve-train harmonics and allows increased valve lift
-Fixed Length 4130 Chrome moly one piece pushrods with swedged formed ends.
-Heavy duty 7/16in. diameter tube with 0.165 wall thickness, precision concentricity, heat treated with a black oxide finish.
-Intake and Exhaust length pushrods are stock replacement lengths and designed to work with the factory base circle camshaft dimensions.
-These pushrods work with all Feuling, stock and SE® M8 camshafts.
-Due to the unstable nature of this 4 valve engine design with 1 rocker arm activating 2 valve springs Feuling highly recommends running one piece pushrods over quick install adjustable rods to maintain maximum cam/valve lift and reduce valvetrian harmonics and associated hydraulic lifter issues.

Replaces OEM # 17900030 & 17900030.

S&S Valve Spring Kit

Works well with cams up to .605in. lift.

-High Performance conical single wire spring.
-Includes Springs.
-Includes Top Collars.
-Includes Keepers.
-Includes Bottom Collars & Seals.
-Sold as a Kit.

Race Series Oiling System. Fits Milwaukee-Eight 2017up with Oil Cooled Engine.

PART No: FE-7097

FITMENT NOTE:

M8 engines must check clearance on front exhaust lifter to camshaft flange fit

FITS :

RACE SERIES OILING SYSTEM, Gear or Chain drive, M8 17up Oil Cooled engines.

* If using gear drive cams, Block-off Plate part # FE-8016 is required

* Kits include a RACE SERIES® oil pump, RACE SERIES® lifters, HIGH FLOW camplate and cam installation kit.

PRODUCT DETAILS :

FEULING® oiling system kits combine all the needed components to finis h your M8® engines oiling system under 1 Part #, available in HP+® or RACE SERIES® kits. FEULING® oiling system kits increase oil pressure, oil volume, engine oil flow and return oil scavenging, eliminating wet sumping and oily air cleaners. Test results show 15-25 degree cooler engine temperatures and 15-30 degree cooler oil temperatures. Results also show a substantial increase of oil pressure and increase in H.P. and Ft. Lbs of T.Q to the rear wheel.

Both HP+® and RACE SERIES® ki ts include FEULINGS® HIGH FLOW billet camplate made from 7075 aluminum which is 50% harder and stronger than the factory or Feuling OE+ camplates. FEULING® increases oil flow and volume by enlarging the oil pump reservoirs and critical oil passages including matching the oil port holes throughout the camplate to the port holes in the engine case which increases engine oil flow to the lifters, piston cooling jets, crankshaft and rod bearings.

Race Series Oiling System. Fits Milwaukee-Eight 2017up with Water Cooled Engine

PART No: FE-7099

FITMENT NOTE:

M8 engines must check clearance on front exhaust lifter to camshaft flange fit

FITS :

RACE SERIES OILING SYSTEM, Gear or Chain drive, M8 17up Water Cooled engines.

If using gear drive cams in.Block-off Platein. part # FE-8016 is required

Kits include a RACE SERIES® oil pump, RACE SERIES® lifters, HIGH FLOW camplate and cam installation kit.

PRODUCT DETAILS :

FEULING® WATER COOLED oiling system kits combine all the needed components to finish your M8® engines oiling system under 1 Part number. FEULING® oiling system kits increase oil pressure, oil volume, engine oil flow and return oil scavenging

Quieter and smoother engine operation

Increase oil pressure, scavenge volume and engine oil flow

30% more pressure gear volume over stock

53% more scavenge gear volume over stock

42% more scavenge volume with port sizing, matched passages and holes to the engine case

68% more oil volume to the crankshaft and connecting rod bearing

15-25 degree cooler engine temperatures

15-30 degree cooler oil temperatures

10-30 more PSI of oil pressure

Reduces wet sumping, blow by and oily air cleaners

Magnets in oil pump to help protect gears and pressure relief valve

Test results show 2 HP gain and 2 ft/lbs of TQ gain to the rear wheel on M8

NOTE: FEULING test results show a 50% reduction of engine sump oil level.

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