S&S 128" Power Pack M8 '17-'19 4.500" Gear

Free Shipping on Orders Over $90!*

* Total order weight must not exceed 10kg. Freight charges may apply. Within Australia only.

Buy all of the matched parts in one kit and save $$$!

Big Bore Kit:

  • 107" to 124" Big Bore Kit
  • Winkle Black Finish with Fin Highlighting
  • Bolt on kit. No case machining required
  • 4.250" bore
  • Forged Pistons
  • 11:1 Compression Ratio

Oil Pump/Cam Plate

  • Precision Machined from Billet Aluminum
  • Blue Anodized Finish
  • Passage Plugs Removeable for servicing
  • Independant Scavenge Sections for Flywheel Cavity and Cam Chest
  • Debris Screens in both scavenge pickups
  • Magnet in Cam Chest to help to stop debris from entering oil pump
  • Increased Flow Capacity on both Feed and Scavenge side
  • Adjustable Pressure Relief Valve is adjustable with unit installed in engine

Pushrods:

  • Quickee Pushrods
  • Chrome pushrod tubes

Tappets:

  • S&S Precision Tappets

Tappet Cuffs:

  • Hard Anodized Black Coating
  • Billet Aluminum Construction
  • Stronger than Stock Material eliminates Distortion
  • Improve tappet stability in high lift and high rpm situations

Cam:

  • S&S 550 Cam- Designed for Big Bore Applications
  • 550C Chain Drive

Valve Springs:

  • Work well with cams up to .605 lift
  • High Performance Conical Single Wire Spring

MADE IN USA

S&S does not recommend compression ratios higher than 10:1 for Tri Glide or other three wheel models (including conversions) due to extra loads caused by the lugging nature of these bikes. Detonation and subsequent engine damage may result.

Find a Store

Details about our showrooms & trading hours are available on our 'Contact Us' page.

Returns & Exchanges

Details about the returns process are available on our 'Returns Policy' page.

SKU SS-310-1104A
Brand S&S
Shipping Weight 0.5000kg

Be The First To Review This Product!

Help other Sydney City Motorcycles users shop smarter by writing reviews for products you have purchased.

Write a product review

The product you're looking at is SKU: SS-310-1104A, quote this when you contact us to fast-track your enquiry.

More From This Category