Swing Arm Main Assembly (Rear Swingarm) – Matte Black for Royal Enfield 350 Platform (Verify by VIN/Photo) – RAR00103/B

Royal Enfield RAR00103/B is the Swing Arm Main Assembly (rear swingarm / rear fork / trailing arm) finished in matte black—the main structural arm that holds the rear wheel and links it to the chassis via the swingarm pivot and rear suspension. Dealer parts portals list it as a certified genuine Royal Enfield spare with the description “SWING ARM MAIN ASSY - MATT BLACK.”

This is the part you replace when the original swingarm is bent after an impact, has pivot-area damage, severe corrosion, or when alignment issues cause abnormal chain line / rear wheel tracking. OEM matters here because swingarm geometry and pivot tolerances directly affect handling stability, chain/sprocket life, and tyre wear.

Also searched as: swingarm assembly, rear swing arm, rear fork assembly, swing arm chassis part, rear suspension arm.

Before you buy: RAR00103/B fitment is not published clearly in open sources—confirm by VIN, existing-part photo, and mounting points before ordering.

Key Features

• Genuine Royal Enfield part number RAR00103/B (matte black swingarm main assembly).

• Core rear chassis component: supports rear wheel + rear suspension geometry

• Best fix for bent/damaged swingarm, misalignment, or unsafe handling from impact damage

• OEM-grade geometry/tolerances to protect chain line, wheel tracking, and stability

• Designed to be used with standard swingarm hardware (pivot spindle/bushes/seals as applicable)

• Matte black finish (matches matte-black chassis/underbody themes on applicable variants)

• Recommended install by a mechanic; alignment + torque settings must be followed

• “Order by part number” product—verification gate included to prevent wrong orders

Compatibility Table 

Explicit exclusions / return-prevention note: Do not assume fitment for Classic 350 UCE / Classic 500 UCE / Bullet UCE / Continental GT 535 / Himalayan / Meteor / Hunter unless your VIN/EPC or your existing swingarm photo matches exactly.

Variants
No variants.

FAQs 

Q1 (Fitment): Which Royal Enfield model does RAR00103/B fit?
A: Public dealer listings confirm the part number + description but don’t reliably publish the exact model mapping in accessible pages. Treat it as VIN/EPC-verified only. Share your VIN with an authorized RE parts counter or match your existing swingarm photo (pivot area + chain guard mounts + brake/ABS bracket locations).

Q2 (Fitment): How can I confirm fitment from my bike without VIN access?
A: Send/compare clear photos of: (1) swingarm pivot area, (2) rear brake/ABS sensor routing brackets (if any), (3) chain guard mounting points, (4) rear wheel adjuster style. If any bracket locations differ, don’t order.

Q3 (Comparison): OEM swingarm vs local/aftermarket fabrication—what’s safer?
A: A swingarm is geometry-critical. OEM ensures correct alignment and pivot tolerances; local repair/fabrication can introduce tracking errors that accelerate tyre/chain wear and affect stability at speed. Genuine-part portals list RAR00103/B as an OEM spare.

Q4 (Installation): What should a mechanic check during installation?
A: Pivot spindle/bush/bearing condition, dust seals, correct torque sequence, rear wheel alignment, chain slack, and free suspension movement. After install, re-check alignment after a short test ride.

Q5 (Symptoms): When do I actually need a swingarm replacement?
A: Rear wheel not tracking straight, uneven tyre wear, chain line instability/noise, visible bend after crash, cracked welds, or persistent misalignment even after wheel/axle adjustment.

Q6 (Returns-prevention): What must I share to avoid ordering the wrong swingarm?
A: Your VIN (preferred) or 4–6 photos: full left/right swingarm, pivot close-up, adjuster ends, bracket areas, and the part number on your invoice/old packaging (if available). If you can’t verify, don’t place the order.