With no need to rebalance flywheels, bore crankcases, or bore cylinders, this kit is about as easy as it gets. Consisting of the largest bore we feel can safely be used in a cylinder with a stock spigot diameter, this kit brings a new definition to the term 'big bore'.
Features and Benefits:
Largest bore S&S feels can safely be used in a cylinder with a stock spigot O.D.
Bolt-on 9 to 10 cubic inches, cylinders do not require crankcase machining to install
Piston weights are the same as stock, requiring no flywheel rebalancing
Forged coated pistons are compatible with stock or S&S Super Stock 89cc heads
Valve pocket recessed in S&S pistons are enlarged for oversize valves and higher lift cams
Compression Ratio (when used with stock cylinder heads): 9.7:1
Compression Ratio (when used with S&S 89cc cylinder heads): 9.4:1
Kit Contents:
Piston set with rings
Top end gasket kit
S&S cylinders
Instructions
Product Note:
Specification
Details
Bore
3.927 in.
CARB Approved
Varies (make selection above)
Color
Varies (make selection above)
Compression Ratio
9.7:1/9.4:1
Country of Origin
USA
Displacement
97 CI
Engine Type
Twin Cam
Finish
Powder Coated
Material
Aluminum
Piston Type
Forged
Stroke
Varies (make selection above)
Vehicle Fitment
Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.
There are no rocker box gaskets included with this particular big bore kit. We recommend the Harley-Davidson Twin Cam S&S Rocker Box Gasket Kit to go along with your order so you've got everything you need to look after those components when installing this big bore kit.
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