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1/4″ JackShaft BoltHigh Strength

Tech Tips:-Advanced timing can cause failure of Ring Gear or Pinion Gear teeth & Starter ClutchSG-4 has 106T with an I.D. of 6.535″.It is used for Big Twin 2007up 69T x 2″ and 2-3/4″ open Clutch baskets.

Features & Benefits:-9/66 Hardened 8620 Steel Ring Gear Set for Big Twin 1994 to 1997.

Features & Benefits:-9/66 Hardened 8620 Steel Ring Gear Set for Big Twin 1998-2006.Tech Tips:-Does not fit 2006 Dyna

length = 118mmTeeth = 9

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High StrengthPrecision Manufactured From Aircraft Quality Steel.Heat Treated.Black Oxide Coated For Longer Life.Made In USA.

High StrengthPrecision Manufactured From Aircraft Quality Steel.Heat Treated.Black Oxide Coated For Longer Life.Made In USA.

All Evolution Industries Ring Gear Conversion Kits Are Manufactured From Aircraft Quality Steel, Heat Treated and Ground Per Evolution Industries Specifications To Insure Maximum Strength And Longevity.Designed To Fit Stock OEM Clutch Baskets.Mounting Bolts Included.Made in USA.

All Evolution Industries Ring Gear Conversion Kits Are Manufactured From Aircraft Quality Steel, Heat Treated and Ground Per Evolution Industries Specifications To Insure Maximum Strength And Longevity.Designed To Fit Stock OEM Clutch Baskets.Mounting Bolts Included.Made in USA.

84 Tooth Easystart Conversion Kit.Evolution Industries Is The Innovator and Manufacturer Of The 10-84 Gear Set That Provides 15% More Torque For Starting High Compression and Large Displacement Engines.All Evolution Industries Ring Gear Conversion Kits Are Manufactured From Aircraft Quality Steel, H...

Features & Benefits:-10/84 Gear Set made with 8620 Hardened Steel for 1994 1997 Big Twin ModelsMade in USA.

Features & Benefits:-10/84 Gear Set made with 8620 Hardened Steel for 1998 to 2006 Big Twin Models.Does NOT fit 2006 Dyna Models.Made in USA.

Made From Aircraft Quality 8620 Steel.Entirely Hardened By Carburization Followed By An Oil Bath, As Opposed to water, quench.Black oxide finish.The Ring Gear Kit Includes A Replacement Starter Clutch and Pinion Gear Assembly (one piece). Starter Clutch Features 20% Larger Rollers For Stronger and L...

Also fits 2006 DynaHigh Horsepower Engines cause the O.E. tensioner to over tension the primary chain during hard acceleration. The Bump Stop eliminates this over tensioning from the chain adjuster on ‘07 & Later Big Twin (Also ‘06 Dyna). The Bump Stop provides a physical impediment to the ratch...

Tech Tips:-Advanced timing can cause failure of Ring Gear or Pinion Gear teeth& Starter ClutchSG-1 has 66T with an I.D. of 7.377″.Works with BDL 47T, 61T & 62T Clutch Baskets.

1 Piece Jackshaft KitSimplifies the design, less moving parts!Replaces OEM # 31612-09Replaces OEM # 33127-94Replaces OEM # 31342-94Replaces OEM # 4358ATech Tips:Uses early seal # JGI-12051 (BT’84-89)

1/4″ JackShaft BoltHigh StrengthPrecision Manufactured From Aircraft Quality Steel.Heat Treated.Black Oxide Coated For Longer Life.Made In USA.

High StrengthPrecision Manufactured From Aircraft Quality Steel.Heat Treated.Black Oxide Coated For Longer Life.Made In USA.

Features & Benefits:-Utilizes 20% oversize rollers for improved performance under hard starting conditionsReplaces OEM # 31663-90Tech Tips:-Advanced timing, High Compression, & Increased cubic capacity can cause failure of Ring Gear, Pinion Gear teeth & Starter ClutchS&S Easy Start Cams are the most...

10/32″ JackShaft BoltHigh Strength, OEM ReplacementTech Tips:-Does not fit 2006 Dyna