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PERFORMANCE MOTORCYCLE PARTS AND KITS FOR AMERICAN V-TWINS

S&S Cycle logo

S&S 124" Hot Set Up Kit for 1999-Up Big Twins

124 inch hot set up kit for 1999-up big twins

Now includes S&S High Performance Tappets!

The S&S 124" Hot Set Up Kit allows owners of 1999-up Harley-Davidson® motorcycles to upgrade their stock 88", 96", or 103" engines to 124" using the stock crankcases. There are a several advantages to installing this kit as opposed to installing a complete 124" S&S engine or Long Block. The first advantage is cost. You don’t have to pay for a complete engine! Many of the stock engine components such as the crankcases, oil pump and cam cover are reused, saving hundreds of dollars. Also, S&S does not offer complete engines to replace Twin Cam 88B™ engines. Another consideration is that since the stock crankcases are used, the engine will retain the original serial numbers. This could mean less hassle with registration and insurance.

Available In Three Versions

Three versions of the 124" Hot Set Up Kit are available. The first, which is highly recommended, features S&S 91cc Super Stock® cylinder heads and a compression ratio of 10.8:1. This kit will provide the best performance and easy starting thanks to the S&S electric compression releases. The second type has a flat topped piston and is intended for use with existing S&S 89cc chamber cylinder eads and yields a compression ratio of 11:1. This kit does not include S&S compression releases, but nearly all S&S 89cc heads are machined to accept them. The third version contains a dished piston designed to provide a 10.8:1 compression ratio with stock cylinder heads. While this kit costs less, the stock cylinder heads will not provide the same level of performance, and starting will be harder due to the lack of compression releases.

124" Hot Set Up Kit® Specs

Year Stroke Bore Cylinder Length Piston Type/CR
91cc S&S heads 89cc S&S Heads 85cc Stock Heads
1999-'06* 4-5/8" 4-1/8" 5.013" Flat top forged/10.8:1 Flat top forged/11:1 Forged, 10.9cc dish/10.4:1
2007-2014 4-5/8" 4-1/8" 5.004" Flat top forged/10.8:1 Flat top forged/11:1 Forged, 10.9cc dish/10.4:1
*Cylinder w/ piston kits include fitted pistons and cylinders that require no boring or honing.

124" Hot Set Up Kits® for Harley-Davidson® Twin Cam 88®/88B™ (Kits include S&S® Super Stock® 91cc Cylinder Heads 10.8:1 Compression)

Model or Engine Type Finish Part No.
1999 - '06 Twin Cam 88 Touring and Dyna® (Except 2006 Dyna® models) Wrinkle Black 900-0564
2001-'06 TC88B Softail® with Balancer Wrinkle Black 900-0565
CTO (other finishes and combinations) Specify

106-5752

124" Hot Set Up Kits® Without Heads for Harley-Davidson® Twin Cam 88®/88B™ Engines (10.4.1 Compression when used with 85cc Stock Heads)

Model or Engine Type Finish Part No.
1999-'06 Twin Cam 88 Touring and Dyna® (Except 2006 Dyna® models) Wrinkle Black 900-0566
2001-'06 TC88B Softail® with Balancer Wrinkle Black 900-0567
CTO (other finishes and combinations) Specify 106-5752

124" Hot Set Up Kits® for Harley-Davidson® Twin Cam 96™/96B™/103™/110™ Engines (Kits include S&S® Super Stock® 91cc Cylinder Heads 10.8:1 Compression Ratio)

Model or Engine Type Finish Part No.
2006 Dyna® & All 2007-up Twin Cam 96™/103™ & 2008-up Touring Models Wrinkle Black 900-0568
2007-'14 big twins with Balancer Wrinkle Black 900-0569
CTO (other finishes and combinations) Specify 106-5752
Does not fit Twin-Cooled™ models

124" Hot Set Up Kits® Without Heads for Harley-Davidson® Twin Cam 96™/96B™/103™/110™ Engines (Kits include dished pistons 10.4:1 Compression Ratio when used with 85cc Stock Heads)

Model or Engine Type Finish Part No.
2006 Dyna® & All 2007-up Twin Cam 96™/103™ & 2008-up Touring Models Wrinkle Black 900-0570
2007-'14 big twins with Balancer Wrinkle Black strongly recommends that the stock chain drive be upgraded to the S&S gear drive or to the H-D® #25284-08 or #25284-11 hybrid plate. This kit updates the problematic
spring loaded chain tensioners to more reliable hydraulic tensioners and also upgrades the oil pump.


Main Bearing Note: S&S flywheel assemblies included in a 124” S&S Hot Set Up Kit® for 1999-'14 big twin engines are designed for use with Timken® sprocket shaft
bearings. They will fit directly in stock 1999-’02 Harley-Davidson® crankcases and in all S&S crankcases for 1999-'14 big twin engines, with no modifications. However,
stock 2003 and later engines use a roller type bearing for the sprocket shaft, and will require modification.

Due to the amount of power these engines produce with an S&S Hot Set Up Kit, S&S strongly recommends retrofitting 2003-'14 model crankcases to accept a Timken sprocket shaft bearing. A Timken conversion sleeve such as Screamin' Eagle® #34822-08 or Jim's® #956 may be used. A charging system spacer for 1999-'02 model year
is also required. The S&S® Service and Speed Center® can preform this modification for you.


If you choose not to convert your crankcases to a Timken sprocket shaft bearing, S&S flywheels may be used in 2003 and later engines with the installation of the Harley-Davidson® bearing kit #24004-03B. This bearing kit adapts the S&S sprocket shaft to be compatible with stock roller type bearings. Verify that the bearing kit contains the 24604-00D or 24607-07 sprocket shaft bearing. Do not use a 24604-00, 24604-00A, 24604-00B or 24604-00C bearing. Please be advised that if this type of bearing is used, sprocket shaft bearing failure WILL NOT be covered under warranty.

Kits with S&S heads are machined special to compensate for engine height change to accomodate a stock length manifold. When using a kit with stock cylinder heads,
S&S recommends using the appropriate length manifold. For a 124" with stock OEM cylinder heads, the standard manifold length is 417.

S&S can provide quality, professional machine shop and engine building service through the S&S® Service and Speed Center®. We can handle any job from fitting a set of
pistons in your cylinders, to complete installation of any engine kit. Contact your S&S customer service representative for details.

Not legal for sale or use on CA or EPA pollution controlled vehicles.

 

Notes: (for 2007-2014 Models)

Stock crankcases need to be bored to accept new 4-1/8" bore cylinders. S&S can provide this service for you! See S&S Service and Speed Center®.


S&S Easy Start Cams save you money – no need to buy compression releases or S&S rocker covers.

For engines with cable controlled throttle bodies we recommend the S&S 58mm single bore throttle bodies and manifolds. For 2008-up touring models with electronic throttle control S&S recommends a S&S Throttle Hog 58mm or 66mm Throttle body.


Main Bearing Note: S&S flywheel assemblies included in a 124” S&S Hot Set Up Kit® for 1999-'14 big twin engines are designed for use with Timken® sprocket shaft bearings. They will fit directly in stock 1999-’02 Harley-Davidson® crankcases and in all S&S crankcases for 1999-'14 big twin engines, with no modifications. However, stock 2003 and later engines use a roller type bearing for the sprocket shaft, and will require modification.

Due to the amount of power these engines produce with an S&S Hot Set Up Kit, S&S strongly recommends retrofitting 2003-'14 model crankcases to accept a Timken sprocket shaft bearing. A Timken conversion sleeve such as Screamin' Eagle® #34822-08 or Jim's® #956 may be used. A charging system spacer for 1999-'02 model year is also required The S&S Service and Speed Center® can preform this modification for you.


If you choose not to convert your crankcases to a Timken sprocket shaft bearing, S&S flywheels may be used in 2003 and later engines with the installation of the Harley- Davidson® bearing kit #24004-03B. This bearing kit adapts the S&S sprocket shaft to be compatible with stock roller type bearings. Verify that the bearing kit contains the 24604-00D or 24607-07 sprocket shaft bearing. Do not use a 24604-00, 24604-00A, 24604-00B or 24604-00C bearing. Please be advised that if this type of bearing is used, sprocket shaft bearing failure WILL NOT be covered under warranty.

Fuel injection tuning is required. S&S offers fuel injection tuning solutions.

Kits with S&S heads are machined special to compensate for engine height change to accomodate a stock length manifold. When using a kit with stock cylinder heads, S&S recommends using the appropriate length manifold. For a 124" with stock OEM cylinder heads, the standard manifold length is 417.