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S&S Cycle 80
Made in U.S.A.
7 Reviews

S&S Cycle 80" Top End Kit


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J&P Part #:  432-994
Mfr Part #:  90-0098

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S&S Cycle 80
S&S Cycle 80" Top End Kit

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S&S Cycle 80

S&S Cycle 80" Top End Kit

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Product Details


Description for S&S Cycle 80" Top End Kit

• These top end kits include a set of S&S Shovelhead-style cylinder heads, a pair of S&S stock bore cylinders 3-1/2″ for 80″ engines, Wiseco forged 8:1 compression pistons complete with rings and wristpins, manifold clamps, manifold seals, all required hardware, and gaskets

• Feature Wiseco 92-2600 series 4-1/4″ stroke pistons and rubber band style cylinder heads

• Pistons are pre-fit to the cylinders, so there is no machine work to be done and very little down time

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S&S Cycle 80

Product Specs for S&S Cycle 80" Top End Kit

Bore or Stroke:
4-1/4" stroke
Compression Ratio:
Displacement Size CI:
Manufacturer Part Number:
Seal or Gasket:
Sold in Units:
Upgrade or Replacement:
Warehouse Part Number:
Fitment Note:

74" engines have a stroke of 3-31/32" and 80" engines have a 4-1/4" stroke but the cylinder length for both engines is the same. The 74" piston is taller than the 80" piston, which results in the same piston-to-head clearance for both engines. While it is possible to install an 80" top end on a 74" engine, this will result in very low compression and poor performance. A 74" top end will bolt to an 80" crankcase but the pistons will contact the cylinder head due to the combination of the taller 74" pistons and the longer stroke of the 80" flywheels. Therefore, it is important to correctly identify the stroke of the engine before ordering a top end kit.

Fitment Questions?

With over 750 years of experience combined, our tech staff has the answers!

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Product Notes

Shipping Note

Due to state regulations we cannot ship this item to the state of California.

Ratings & Reviews

Help Customers Understand This Product

7 Reviews
Rating Breakdown
5 stars
4 stars
3 stars
2 stars
1 star
January 6, 2021
In the process of installing S&S 80” Shovel top end kit now but the shipping was super fast and I had to call J&P tech line and they were very helpful
March 16, 2015
I put this kit on a 79 FXS. Took my time and now I'm very happy with it. One thing, MAKE sure you adjust your valves after you put it all back together (rookie mistake had me chasing my tail). Will make your scoot just like new!
June 16, 2014
The guy at the part counter should been sweeping the floors, not selling parts
October 16, 2013
Nice set, should start building the Engine this week.
July 20, 2012
Great product everything it says fit is exact runs great
April 2, 2006
Hello, I recently purchased a Shovelhead top end kit and multiple small items. I was extremely happy with products and very quick shipment. I also made a technical inquiry and was treated very courteously and was well informed. Thanks for your help in getting me back on the road.

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