510-0728 M8 only brochure_no_MSRP

129" , 132" , & 136" BIG BORE KITS Fitment:

• 2017–2021 touring models • 2018–2021 Softail ® models

Features & Benefits: • Huge bore increase (4.320") means huge power increase • Works with stock crankcases • Original engine serial numbers are retained • Powder coat finish match factory finish, giving the bike a “sleeper” advantage • MLS (multi-layered steel) head gaskets • Retains stock engine height • Includes Cam Cover Badge • Must be used with our stroker flywheels to achieve 136" displacement (part #s 320-0605)

129, 132, & 136 KITS FOR 2017–2021 TOURING MODELS Displacement Stroke Finish

Part #

910-0843

4.375"

Wrinkle Black with Highlighted Fins

129"

910-0844

4.375"

Wrinkle Black with Non-Highlighted Fins

910-0845

4.500"

Wrinkle Black with Highlighted Fins

132"

910-0846

4.500

Wrinkle Black with Non-Highlighted Fins

910-0848

4.625"

Wrinkle Black with Highlighted Fins

136"

4.625" 910-0849 FOR CLOSED COURSE COMPETITION USE ONLY. NOT INTENDED FOR STREET USE. LEGAL IN CALIFORNIA ONLY FOR RACING VEHICLES WHICH MAY NEVER BE USED, OR REGISTERED OR LICENSED FOR USE, UPON A HIGHWAY. NOT LEGAL FOR SALE OR USE NATIONWIDE ON ANY FEDERAL POLLUTION CONTROLLED MOTOR VEHICLE UNDER THE CLEAN AIR ACT. Wrinkle Black with Non-Highlighted Fins

Performance Kits

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.

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