S&S Cycle X7N High Strength Final Drive Belt For Harley Dyna (2000–2006)
Unmatched Tensile Strength for High-Horsepower Twin Cam Dynas
Transfer every foot-pound of torque directly to the pavement with the S&S Cycle X7N High Strength Final Drive Belt. Designed specifically for 2000 through 2006 Harley-Davidson Dyna models, this heavy-duty secondary rear drive belt is engineered to replace standard OEM belts that often flex, stretch, or snap under heavy load and aggressive riding conditions.
Built using advanced carbon/aramid cord tensile member technology enclosed within an ultra-durable HNBR rubber compound, the S&S X7N belt offers up to 70% higher tensile strength compared to standard aftermarket drive belts. Whether you are running a high-compression big-bore engine kit, launching hard from stoplights, or putting down highway miles, the X7N delivers reliable power delivery without stretch or tooth shear.
Technical Specifications & Product Details
| Feature / Metric | Product Specification | Rider Benefit |
|---|---|---|
| Brand / Manufacturer | S&S Cycle (Made in USA) | Industry-leading V-Twin performance engineering and proven quality control |
| Tooth Count & Width | 133-Tooth / 1-1/8″ (28.5 mm) Width | Direct OEM replacement pitch and width for factory Dyna rear pulleys |
| Internal Cord Construction | Advanced Aramid/Carbon Tensile Cord Core | Prevents belt stretch and maintains precise belt deflection setting over time |
| Rubber Compound | High-Temperature HNBR Rubber Matrix | Resists oil, road grime, heat breakdown, and tooth shearing under sudden torque loads |
| Tooth Profile | Precision Parabolic Tooth Design | Smoothly meshes with factory front and rear drive pulleys to reduce noise and friction |
Material Science & Engineering Performance
### Superior Tensile Strength & Anti-Stretch Technology
Stock drive belts rely on traditional fiberglass cord structures, which can break down over time due to high heat cycles and severe shock loads. The S&S X7N belt utilizes a high-density aramid cord package. This ensures virtually zero belt stretch, maintaining proper rear-wheel alignment and belt deflection while preventing tooth snapping during hard gear shifts.
### Parabolic Tooth Mesh & Durability
The parabolic tooth profile is precision-molded to match Harley-Davidson OEM pulley tooth contours. This exact contact area distributes rotational force evenly across the entire face of the pulley, eliminating localized tooth wear, reducing friction heat, and delivering quiet, maintenance-free operation.
Vehicle Compatibility Guide
The S&S Cycle X7N Final Drive Belt (Part #106-0359 / 133-Tooth x 1-1/8″ Width) is engineered as a direct replacement for 2000–2006 Harley-Davidson Dyna models running standard 133-tooth secondary drive configurations:
### Compatible Harley-Davidson Dyna Models (2000–2006)
- Super Glide: FXD / FXDI (2000–2006)
- Super Glide Custom: FXDC / FXDCI (2005–2006)
- Super Glide Sport: FXDX / FXDXI (2000–2005)
- Super Glide T-Sport: FXDXT (2001–2003)
- Street Bob: FXDB / FXDBI (2006)
- Low Rider: FXDL / FXDLI (2000–2006)
- Wide Glide: FXDWG / FXDWGI (2000–2006)
Fitment Note: Always verify your motorcycle’s exact pulley size and existing belt tooth count prior to ordering, especially on custom builds or altered secondary gear ratio configurations.
Step-by-Step DIY Installation Guide
Replacing the secondary final drive belt on a Twin Cam Dyna requires removing the primary drive system and rear swingarm axle assembly.
### Required Tools
- Primary drive locking tool and socket set
- Torque wrench (ft-lbs)
- Rear wheel axle nut wrench
- Belt tension gauge tool
- Primary gasket kit & primary lubricant
### Step 1: Primary Drive & Outer Assembly Removal
Ensure the motorcycle is elevated safely on a frame lift. Drain the primary fluid and remove the outer primary cover. Lock the primary sprockets using a primary locking bar, then unbolt and remove the primary chain, clutch basket, and inner primary housing to access the transmission output shaft pulley.
### Step 2: Swingarm & Rear Axle Preparation
Loosen the rear axle nut and back off the axle adjusters. Slide the rear wheel forward to release belt tension. Remove the pivot bolt or swingarm bracket hardware on the drive side to slide out the old secondary belt.
### Step 3: Installing the S&S X7N Belt & Tensioning
Loop the new S&S X7N belt around the transmission output pulley and rear wheel sprocket. Reassemble the inner primary and primary drive train with new gaskets. Tension the rear belt to factory specification using a belt tension gauge (typically 5/16″ to 3/8″ deflection at 10 lbs of force on a cold belt) and torque the rear axle nut to factory specs.
Frequently Asked Questions
### Is this belt stronger than the factory Harley-Davidson OEM belt?
Yes. The S&S X7N belt utilizes an upgraded aramid tensile cord structure and specialized HNBR rubber, offering up to 70% higher tensile strength than standard OEM factory belts, making it ideal for high-horsepower Twin Cam engines.
### How often should I check the tension on an X7N drive belt?
Check belt deflection after the initial 100 miles of installation to ensure proper seating, and every 5,000 miles during routine oil service intervals.
### Order Your S&S Cycle X7N Final Drive Belt Today
Protect your drivetrain and maximize rear-wheel power output on your 2000–2006 Harley-Davidson Dyna. Order the S&S Cycle X7N High Strength Final Drive Belt today with fast shipping!
