S&S CYCLE KN-93 CRATE ENGINE HARLEY DAVIDSON

S&S CYCLE KN-93 CRATE ENGINE HARLEY DAVIDSON

93" | 8.2:1 compression | 4.5" stroke | 3-5/8" bore

The KN-Series engines are very close in appearance to a stock knucklehead engine, but offer modern features for more power, better engine life, and improved reliability. The main improvement is the 1958–1965 style flywheel assembly using a splined sprocket shaft and Timken® sprocket shaft bearing. Rocker arm cover tins use die-cast aluminum lower covers held down by valve spring pressure — easier to service and a more positive seal than stock. Authentic generator-style crankcases for 1936–1947 Harley-Davidson® OHV Big Twin chassis. Gloss Black finish.

SPECIAL ORDER ONLY

Included with This Engine

• S&S Super Stock™ electronic ignition system (preset)
• S&S Super E carburetor
• Completely assembled and ready to run
• Generator style crankcases
• Gloss Black finish

Separately Required — Not Included

• 1955–1964 style inner tin primary cover (required due to 1958–65 flywheel assembly style)
• 1955–1964 style primary chain sprocket (required)
• ⚠️ CONFIRM: Verify with your installer whether any additional oil lines or chassis-specific hardware are required

Tuning & Ignition

• S&S Super Stock™ electronic ignition included — preset at the factory
• S&S Super E carburetor included — jetting may need adjustment for your exhaust and air cleaner setup
• ⚠️ CONFIRM: Dyno tuning recommendation — confirm scope with your installer

Installation Scope

• Designed for 1936–1947 Harley-Davidson® OHV Big Twin generator-style chassis
• Requires use of 1955–1964 style primary cover and sprocket (departure from pure stock)
• ⚠️ CONFIRM: Professional installation strongly recommended — confirm scope with your shop

Manufacturer Warranty

• One-year warranty (as stated in product documentation)
• ⚠️ CONFIRM: Verify current warranty terms and conditions directly with S&S Cycle before purchase

Current Lead Time

• Special order only — this engine is not stocked and must be ordered from S&S
• ⚠️ CONFIRM: Contact us before ordering to verify current availability and estimated ship date

Pre-Purchase Confirmation

Before placing your order, please confirm the following with our team:

• This engine is compatible with your 1936–1947 generator-style OHV Big Twin chassis
• You have the required 1955–1964 primary cover and sprocket sourced
• You have a qualified installer lined up
• You understand this is a special-order item and lead time and warranty terms

Contact us to confirm compatibility and availability before purchasing.