Royal Enfield 521186/B – Hand Grip LH (Front Counter Weight Type) for Classic 350/500, Bullet 350/500, Thunderbird 350/500, Rumbler 500, Bullet Trials 500, Continental GT 535 & Hunter 350 – Genuine OEM Left Grip

The Royal Enfield 521186/B Hand Grip LH – Front Counter Weight Type is the genuine left-side handlebar grip used on a wide range of Royal Enfield single-cylinder models. Official price lists and European microfiche describe 521186/B as “HAND GRIP (LH) – FR COUNTER WT.” and show it as the updated replacement for older part 521186/A.

521186/B for Classic 350/500, Bullet 350/500, Thunderbird 350/500, Rumbler 500, Continental GT 535 and Bullet Trials 500, confirming common fitment across UCE-era bikes that use bar-end weights. Recent listings and hand-grip sets combining 146044/B (RH) with 521186/B (LH) also show usage on Hunter 350 BS6, indicating Royal Enfield retained the same LH rubber profile for this J-series model.

Moulded from vulcanized rubber with a closed end for the counterweight, this OEM grip offers a comfortable, non-slip surface and effective vibration damping, especially at cruising speeds. It is the ideal replacement when the original grip becomes hard, torn, oily or damaged in a fall, and ensures a factory finish that generic aftermarket grips cannot match.

Pair 521186/B (LH) with 581098/B (Grip Comp. Throttle RH) for a complete, OEM-correct handlebar refresh on your Classic, Bullet, Thunderbird, Trials or Hunter.

Key Features

• Genuine Royal Enfield OEM part – Part No. 521186/B, superseding earlier 521186/A.

• Described in factory documents as “HAND GRIP (LH) – FR COUNTER WT.”, designed for handlebars with bar-end weights.

• Confirmed fitment for Classic 350/500, Bullet 350/500, Thunderbird 350/500, Rumbler 500, Bullet Trials 500 & Continental GT 535 via multiple dealer catalogues and microfiche.

• Used in OEM grip sets with 146044/B (RH) and clearly listed for Hunter 350 BS6 model codes in recent RE grip kits.

• Made from durable vulcanized rubber for long life, good grip and improved comfort on longer rides.

• Closed-end profile accepts original bar-end dampers (521201/B / 521201/C1) without modification.

• OEM length and diameter – perfect match to the right-hand throttle grip and LH switch housing with no “jugaad”.

• Direct plug-and-play swap for worn or damaged LH grips; no adhesives or wire-tying needed.

• Ideal for restorations, crash repairs or customers wanting to keep their motorcycle visually stock and resale-friendly.

Compatibility Table 

PLEASE CHECK PART NUMBER BEFORE PURCHASE 

Explicit Exclusions / Caution

• ❌ Classic 350 Reborn (J-Series) – no direct microfiche tie to 521186/B; appears to use different LH grip in most parts lists.

• ❌ Meteor 350, Bullet 350 J, Super Meteor 650, Interceptor 650, Continental GT 650, Himalayan 411/450, Scram 411, Guerrilla 450, Shotgun 650 – some generic marketplaces tag them, but there is no consistent parts-catalog confirmation, so we do not advertise fitment to avoid returns.

For these models, advise customers to share VIN + model on WhatsApp for a manual check.

Variants

This listing covers a single, specific part:

• 521186/B – Hand Grip LH – Front Counter Weight Type – Black – Single piece (Left-hand only)

Suggested related products (cross-sell):

• 581098/B – Grip Comp. Throttle RH (matching RH throttle grip for UCE models).

• 521201/B or 521201/C1 – Damper Weight (Bar-End Weight) for a fresh, rattle-free setup.

FAQs 

Q1. Is 521186/B just the rubber grip, or does it include a tube?
521186/B is the bare left-hand rubber grip designed to slide directly onto the handlebar. The LH side does not use a throttle tube, so this part does not include any plastic sleeve or mechanism.

Q2. Does this fit both Classic 350 and Classic 500 UCE?
Yes. Classic 350 UCE and Classic 500 EFI use the same LH hand grip in the handlebar & controls microfiche, with 521186/A superseded by 521186/B.

Q3. Will this work on my Hunter 350?
Trusted dealer sites and OEM grip sets pairing 146044/B (RH) with 521186/B (LH) explicitly list Hunter 350 BS6 model codes, so fitment is confirmed for Hunter 350.

Q4. Do I need new bar-end weights with this grip?
Not necessarily. If your original bar-end weights and screws are in good condition, you can reuse them. If they are rusted or damaged, we recommend replacing with genuine damper weights (521201/B or 521201/C1) for best results.

Q5. Can this grip be used on generic 22 mm handlebars for a custom build?
Yes, as long as the bar is 22 mm (7/8") and closed-end or drilled correctly, you can slide this grip on. However, perfect bar-end weight fitment is guaranteed only on stock Royal Enfield handlebars.