S&S Cycle 475G Camshaft Kit — Gear Drive — 2017-Up M8

The 475 is S&S's bolt-in horsepower cam for the M8 — it bumps output to over 100 hp and makes its power toward the top of the RPM range. This gear-drive kit deletes the chain and tensioner for more accurate valve timing.

FITMENT

Fits 2017-up Harley-Davidson M8 models, excluding VVT models. In our catalog: 2017-up M8 Touring models.

Not sure it fits your bike? Email info@norcalbaggersupply.com — email is the fastest way to reach us — and we'll confirm before you order. You can also call 916-626-9030 (Mon–Fri, 9 AM–5 PM PT).

CALIFORNIA NOTICE

Race use only — not legal for use in California. S&S Cycle publishes no CARB Executive Order for this part, and S&S marks it "NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLE." It is not legal for use on pollution-controlled vehicles operated on public streets or highways in California, and we cannot ship it to a California address — orders shipping to California will be cancelled and refunded. Available for shipment to the other 49 states.

SPECIFICATIONS

• Manufacturer: S&S Cycle — part number 330-0645
• Cam kit includes the camshaft and all required bearings, o-rings, and hardware (S&S)
• Cam: S&S 475, gear drive — bolt-in cam that bumps the M8 to over 100 hp (S&S)
• Gear drive provides improved valve timing accuracy and eliminates the cam drive chain and tensioner (S&S)
• Valve lift: .475 in. intake / .475 in. exhaust
• Duration at .053 in. lift: 213.5° intake / 263.9° exhaust (front); 213.5° / 252.5° (rear)
• Lobe centers: 96.2° intake / 108.5° exhaust (front); 100° / 111.6° (rear)
• Valve lift at TDC: .084 in. intake / .112 in. exhaust (front)
• Made in the USA

INSTALLATION

Camshaft installation is internal engine work. The kit includes the bearings, gaskets, o-rings, and hardware S&S specifies for the job; follow the S&S instruction sheet included in the box and your Harley-Davidson service manual for timing and torque specs. S&S publishes an official cam chest install video — it is embedded below. Professional installation is recommended; email us if you'd like a referral to one of our install partners.

QUESTIONS RIDERS ASK

475 or 465?
The 465 is torque-first, strongest down low. The 475 keeps pulling to the top of the range and is the one that gets a stock motor over 100 hp. Pick by where you ride in the revs.

Anything to check before gear drive?
Pinion shaft runout — gear drive needs a true crank. Over spec? Run a chain-drive kit instead. Email us if you're not sure of your numbers.

Can you ship this to California?
No. This is a race-use-only part that does not conform to CARB standards, so we do not ship it to California — see the California Notice above. It is available to the other 49 states.