1990801 Royal Enfield Black Air Fly Engine Guard for Thunderbird 350/500 & Thunderbird X 350/500 | Genuine GMA OEM

The 1990801 Royal Enfield Black Air Fly Engine Guard is a genuine Royal Enfield GMA (OEM accessory) engineered to protect the engine area while keeping a clean, factory-correct stance on Thunderbird 350/500 and Thunderbird X 350/500. It uses a 32 mm steel tube construction with a black powder-coated finish for corrosion resistance and long-term durability, and it is designed to balance protection without compromising the chassis in the event of a fall. 

This guard is ideal for riders who do highway touring, daily commuting, or rough city roads where low-speed tip-overs and parking knocks are common. Unlike many aftermarket guards that vary in bend geometry and mounting alignment, the OEM Air Fly guard is made for correct fitment and a consistent look. Royal Enfield’s accessory info also references a typical ~20-minute fitting time for this part number on the Thunderbird platform. 

If you are searching terms like “Thunderbird crash guard”, “Airfly engine guard TBX”, “Royal Enfield 1990801 leg guard”, this is the exact OE part number to match.

Key Features 

• Genuine Royal Enfield GMA/OEM engine guard (Part No. 1990801) 

• 32 mm steel tube construction for robust impact protection

• Black powder-coated finish for corrosion resistance 

• Designed to provide protection with authentic styling and controlled load path 

• Model-specific fitment for Thunderbird & Thunderbird X platforms 

• Helps reduce cosmetic/functional damage in low-speed falls and parking incidents

• OE accessory installation reference indicates ~20 mins fitting time 

Compatibility Table 

Royal Enfield’s official accessory documentation and catalogue list this part number under Thunderbird families. 

Variants

• No variants (Single part number: 1990801, Black)
  Related (separate SKU, not a variant): 1990800 Air Fly Engine Guard – Stainless Steel finish is referenced alongside 1990801 in Royal Enfield fitment instructions. 

FAQs 

1. What is Royal Enfield part number 1990801?
   1990801 is the Black Air Fly Engine Guard listed in Royal Enfield accessory documentation for Thunderbird model families and in the official GMA catalogue under Thunderbird/TBX protection accessories.

2. Will 1990801 fit Thunderbird X (TBX) 350/500?
   Yes—1990801 appears under Thunderbird X protection accessories in the official GMA catalogue, and it is called out in Thunderbird X accessory coverage. 

3. Will this fit my Classic 350/500 UCE?
   Not confirmed consistently across official/market sources for this part number. To avoid incorrect orders, we are not claiming Classic fitment for 1990801. If your Classic uses “Air Fly” style, match the correct Classic-specific part number in your official lookup before ordering. 

4. What is the tube size and finish?
   Royal Enfield describes Air Fly engine guards as fabricated from 32 mm steel tube with a black powder-coated finish for corrosion resistance and durability. 

5. Is installation complicated? Do I need welding?
   This is designed as a bolt-on OE accessory. Royal Enfield’s accessory references commonly indicate ~20 minutes fitting time on the Thunderbird accessory set, but proper tightening and alignment are critical—fitment by a competent mechanic is recommended.