Honda is reportedly working on a bigger version of the ADV 150. Indonesian motoring portal TMC Blog claims that the higher displacement variant may arrive with a 250 cc motor of the Forza 250. The quarter-litre variant will reportedly make debut at the 2019 Tokyo Motor Show between 24 October and 4 November.

The source further adds that a 300 cc variant will join the list in the distant future, most likely at the 2019 EICMA. The quarter-litre variant will be available in markets like Japan and South-East Asia while the 300 cc version will most likely head to the European markets.

Styling cues on the 250 cc and the 300 cc variants will most likely be identical. We expect to see ADV 150 inspired visuals on the ADV 250 and ADV 300. Thus, the adventure-spec vehicles will feature apron-mounted twin-pod headlight and a tall windscreen at the front. The ADV 250 and the ADV 300 will pack full LED lighting (headlight, blinkers and taillight) and a negative backlit display – features that were seen on the recently unveiled ADV 150.

The addition of cross-spoke wheels will add to the rugged persona of the ADV 250/300, although Honda may opt for alloy wheels to keep the costs low. Like the ADV 150, the 250 cc and the 300 cc variants will use dual-purpose tyres with knobby design.

Hardware specifications will most likely remain similar to the ADV 150, and the ADV 250/300 will pack conventional front forks and twin-sided, gas-charger rear springs to perform the shock absorption tasks. Braking setup will comprise petal-type disc brakes on both wheels (256 mm front/240 mm rear), while the safety net will be handled by dual-channel ABS.

In terms of performance, the quarter-litre version will use a 249.01 cc single-cylinder, liquid-cooled, 4-valve engine with a fuel injection system that produces 23.5 PS of peak power at 7,500 rpm and 24 Nm of maximum torque at 6,250 rpm. The ADV 300, on the other hand, will draw 25.1 PS at 7,000 rpm and 27.2 Nm at 5,750 rpm from its 279 cc single-cylinder, liquid-cooled, 4-valve motor with fuel injection technology.

None of the Honda ADV models are likely to be launched in India in the foreseeable future.