Rieju Aventura Rally 307 2026 Review

Most of my friends are motorcyclists, and even so, when I mentioned I had recently tested the 2026 Rieju Aventura 307 Rally, most had never heard of it. Unless you are up to speed with the current crop of enduro bikes, you may not be familiar with the Rieju brand. Those that do know the brand often refer to it as ‘the old GASGAS bikes’, which is doing both Spanish-born brands a disservice.

So how are Reiju and GASGAS connected? Rieju is a family-owned business that manufactured its first mopeds in 1945, then motorcycles in 1953. It is still family-owned and claims to be the last 100 per cent Spanish motorcycle manufacturer (but there is a catch, which we'll tell you below), having produced more than 600,000 bikes.

Meanwhile, back in 2019, KTM bought a 60 per cent share in GASGAS (then owned by Torrot) with a plan to phase out the existing design and implement its own engine and chassis design. They wanted to capitalise on the GASGAS brand name, which they saw as being more ‘accessible’ or, in other words, affordable. Soon, the GASGAS range was extremely similar to KTM, with some minor specification changes.

When Reiju learned of the KTM takeover, the Spanish company purchased the intellectual and industrial rights to the GASGAS off-road bikes of that time. It has continued to develop its off-road model range and remains an underrated maker of high-spec enduro bike offerings. So when word got out that it now offered a small-bore adventure bike, I was quick to raise my hand to test it for bikesales.

The Rieju Aventura Rally 307 is priced from $8990 ride-away, and if you’re like me, you probably re-read that twice! Considering the specifications on offer and Rieju’s pedigree in the off-road world, this seems like good value to me. Its closest competitor, the Honda CRF300L Rally, is more expensive at $10,699.

Unlike many adventure bikes, the Aventura Rally is not an overwhelming prospect in terms of price and stature. The whole concept of adventure riding is to experience excitement through testing yourself in the unknown. For many riders, simply riding unsealed roads is daunting. For those new to this segment, the idea of testing their skills on a heavy and expensive bike could quickly turn them away.

The Rieju Aventura Rally 307 tips the scales at 138kg dry or 160kg wet and offers pretty much all you could ask for in a small capacity adventure bike. It uses the tried-and-tested 21-inch/18-inch wheel combo and fully adjustable forks and shock, offering 235mm of travel at both ends. There’s also a compact yet purposeful windshield which houses a 7-inch TFT screen that offers all your bike info and smartphone mirroring, so you can easily run turn-by-turn navigation. There are braced handguards, full LED lighting, and dash-mounted USB-A and USB-C charging ports. And what appeals to me most is the 21-litre fuel tank, offering a near-500km range.

And what about the ride experience? Every rider has their own idea of what an adventure riding route is, but if you enjoy a challenge, the 307 won’t disappoint.

On trails that you wouldn’t dare point a one-litre-plus bike at, you’ll find the 307 ambling through with ease. If you were blindfolded, you could easily mistake the 307 for a mild-mannered trail bike such as a TTR 250. The combination of a slim seat design and 890mm seat height makes getting your feet on the floor an easy task. When the trails do open up and speeds rise, the 307 remains light and nimble but retains excellent balance and stability through changing terrain.

When I did arrive at a mid-trail drain culvert way faster than intended, I was both thankful and impressed at how well the 307 absorbed the impact without any harsh bottoming out. Although only 300cc, the bike feels full-size, with wide footpegs and an uncramped riding cockpit. The power may be minimal, but the delivery is smooth, with no surprises, which assists in finding grip when things get slippery. Braking, like the suspension, feels up to the job. On the bitumen, I had the fork compressed hard and the front tyre squirming before the ABS intervened. You can also switch the ABS to a less intrusive dirt setting or simply switch it off.

Although Rieju claims the bike is assembled in Spain, the engine is produced by Chinese manufacturer Loncin. And the stigma that comes with a ‘Chinese-made’ motorcycle is something Rieju will have to overcome.

There shouldn’t be anything to worry about though, as Loncin produces six million engines per year, including several BMW engines, and has been supplying that European brand for more than 20 years with both single- and twin-cylinder powerplants. It is also behind Chinese brand Voge, which is due to hit Aussie shores soon.

But despite increasing maturity of Chinese bike makers, it is still taking time to gain people’s trust, as people often lose confidence when they see a sub-$10K price tag and hear the words ‘Chinese components’. Reliability (or lack thereof) will become evident with time, but for know its a relative unknown.

Another issue is that the lack of grunt at Australian highway speeds. Rieju claims the 293cc engine produces 33.5hp, but they do feel like small ponies. Plus the standard 14-46 gearing is quite short for faster speeds, so you'll rarely use first. The 307 spins over 7000rpm at 100km/h, and that does become tiring. In saying that, it’s not as tiring as picking up a 200kg+ bike in sand multiple times, so it's a compromise. But there are some potential fixes.

Chaz, the technical manager for Rieju Australia, informed me they already carry a 15-tooth option that will reduce the rpm at 100km/h by 500rpm, down to 6500rpm, and I think this will be an option that would suit most riders. There is also power-up kit available, including an exhaust system, ECU and air cleaner element that adds a claimed 5hp. It would be brilliant if that extra grunt could be offered as standard, but I’d say Euro 5 emissions laws have put a stop to that.

If you want a multi-cylinder adventure bike, the market is saturated with options, but step down to the single-cylinder offerings and things appear pretty limited. Rieju has identified a near-empty niche and produced an initial offering that ticks a lot of boxes.

The Aventura Rally 307 won’t be for everyone, but I see it as a small bike with big appeal. And not only for inexperienced riders, but also for more advanced riders who want an adventure bike that is both affordable and easy to muscle around.

ENGINE
Type: Single-cylinder 4-stroke DOHC, 4-valve
Capacity: 293cc
Bore x Stroke: 78.0 x 61.2 mm 
Compression Ratio: not listed
Fuel System: EFI with twin Bosch injectors

PERFORMANCE
Claimed maximum power: 33.5hp
Claimed maximum torque: 27Nm

TRANSMISSION
Type: 6 speed
Clutch: wet, multi plate
Final Drive: chain

CHASSIS AND RUNNING GEAR
Frame: High-strength steel spine 
Front Suspension: Upside down fork 43mm adjustable compression/rebound 235mm travel
Rear Suspension: Progressive shock absorber, adjustable preload, compression/rebound with 235mm travel
Front Brake: Double-piston caliper, 300mm wave disk 
Rear Brake: Single-piston caliper, 240mm wave disk
Tyres: Front 80/100/21 road trail, Rear 120/80/18 road trail

DIMENSIONS AND CAPACITIES
Claimed wet weight: 153kg
Seat height: 890mm
Ground clearance: 260mm
Wheelbase: 1420mm
Fuel capacity: 21 litres

OTHER STUFF
Price: $8990
Colours: signature black with red accents
Warranty: Two-year factory