Overview
- Kits are being offered through authorised service centres, though dealers report uneven stock and urge owners to confirm availability before visiting.
- Dealers quote about Rs 1,700 for the BS4 kit, with final costs varying by labour and any additional recommended parts.
- The retrofit swaps in ethanol-resistant fuel lines, hoses, seals, O-rings and related gaskets to reduce corrosion, rubber degradation and blockages.
- The solution targets carbureted UCE models such as the Classic 350, Bullet 350 and Thunderbird, while some components can be applied to 500cc bikes in place of a dedicated kit.
- Royal Enfield says all BS6 models have been E20-compliant since 2020, and even with the retrofit older bikes may still experience lower fuel economy on E20 petrol.