S&S Cycle 590G Camshaft Kit — Gear Drive — 2017-Up M8

The 590 in gear drive: S&S's maximum-horsepower M8 grind with gear-drive timing accuracy. Big lift for 124+ motors that live at the top of the tach — not a stock-motor cam.

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 330-0732
• Cam kit includes the camshaft and all required bearings, o-rings, and hardware (S&S)
• Cam: S&S 590G, gear drive — all-out horsepower cam for 124 cu in and larger engines (S&S)
• Gear drive provides improved valve timing accuracy and eliminates the cam drive chain and tensioner (S&S)
• Valve lift: .590 in. intake / .590 in. exhaust
• Duration at .053 in. lift: 239.4° intake / 266.1° exhaust (front); 253.9° / 258.4° (rear)
• Lobe centers: 104.1° intake / 111.7° exhaust (front); 106.7° / 113.5° (rear)
• Valve lift at TDC: .165 in. intake / .186 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

What builds is the 590 for?
124 cu in and larger engines, per S&S. It trades low-RPM manners for top-end horsepower — on a stock 107/114 it will feel soft down low.

Do I need valve springs and head work?
At .590 in. of lift, yes — plan on high-lift valve springs and clearance checks. S&S states it is the installer's responsibility to check all clearances. Email us your build before ordering.

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.