Category Archives: AMH News

Klim Traverse GTX jacket

Pitching the InflataSeat™

The other evening I had a great idea while riding my MTB along a Purbeck ridge. My Merida hardtail bike (left) has a dropper seatpost: thumb a lever and the saddle drops 6 inches under your weight; press again with your weight off and the post springs back up to full height for efficient pedalling effort. Far from another MTB gimmick, I use it all the time when approaching a gate, on steep downhills or even just getting on/off or stopping to look at the map. I think motos could use a similar feature when off road: there are times you want it high and times you want it low, with no faffing in between.
Automatic ride height adjustment as found on some H-Ds and BMW 13GSs is not the same thing. Nor is static saddle height adjustment by repositioning the seat base on its mounts; the sort of thing you usually do once. The main reason I never got the otherwise great XT700 back in 2019, was the seat was too high for what I like to do.

Do all-terrain motos really need dynamic seat height adjustment? Well, until MTB droppers came on the scene, I’d have said ‘no’ and managed by manually dropping saddle for rough descents. On a moto, a high saddle – or more precisely a long peg-to-saddle distance – reduces the effort of standing up and is why competition bikes have yard-high saddles: dirt racers are on the pegs most of the time.
Those bikes are of course feather light and easy to manage in the rough. Bring a similar saddle height to a 230-kilo loaded travel bike, like the Desert X Rally I rode with (below), and tackling rough stages requires skill and commitment, assisted by plush suspension and good armour. I can tock off all four, but I do find some low saddles (above: Him 450) a bit hard on the knees, even if I can reassuringly get my feet down.

My brilliant idea uses an inflatable chamber integrated in the bike’s seat foam, tech I know from inflatable kayaks. IKs attempt to mimic the hydrodynamic form of a hardshell kayak and a few years ago drop stitch panels from paddle boards were adapted to make boxy, ‘3-plank’ IKs (below right).

Drop stitch (DS) panels hold much higher pressures than tubes (15psi+ vs 3psi on I-beams) while retaining the flat panel shape. The result is hardshell-like rigidity with the transport and storage convenience of a roll-up kayak. Decades ago, Goodyear even developed a drop stitch airplane for the US military.

For this moto seat application, it’s not about rock-hard rigidity, but being able to increase saddle height by 2-3 inches while retaining a normal looking moto seat. The bladder could be integrated in the seat vinyl which would need stretchy sides or some other idea so as not to look crumpled when set low and not to wobble about like some non DS air seat pads.
Sadly, my pitch stumbles when it comes to inflating and deflating this chamber at the flick of a switch. Exhaust gas being too hot, some sort of separate on-board compressor would be needed which adds weight, cost and complication. And you’d want a fast purge valve because when you want less height, you probably want it fast.

PS: I have to admit Dave K’s comment suggesting a scissored lever with similar click/release mechanisms to a pushbike dropper is much better. On the jack pictured below, the base is the bike’s subframe rails and the top is the seat base. The seat is raised by spring/s under compression to engage a lock-out to stay up. A thumb lever cable (a bit like the old compression release lever on an XT500) disengages the upper lock and, aided by body weight, the seat drops to lock in the lower position. Thumb the lever again and it springs up, but ideally with a bit less force than 007’s DB5 (right).
Issues I foresee include retaining a secure seat when raised. You don’t want it wobbling about laterally when bashing about off road which may mean hefty beams. Alongside that, the inelegant gap in the raised position could be designed around.

Quick look: Adventure Spec Gravel Jacket

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See also:
Adventure Spec Linesman
Klim Overland
Aerostich Falstaff (waxed cotton)
Aerostich Darien
Mosko Moto Surveyor
Mosko Basilisk
Klim Traverse 2
Klim Traverse GTX (soon)

Quick look: Adventure Spec Gravel Jacket

In a line: Well featured, fully armoured, all-season shell for cooler or faster rides

Price: £549

Size and Weight: XL; 2520g or 1440g without armour (verified)

What they say:
The Gravel Jacket is a CE AA certified, highly durable, lightweight, waterproof, breathable adventure touring jacket. It combines everything Adventure Spec has learned about extreme off road and trail riding into the lightest adventure touring package. The Gravel Jacket is designed to be partnered with the Gravel Pant. It is constructed from a three-layer waterproof fabric that features a blend of Cordura Nylon 6-6 for high abrasion resistance, and PU film for extreme water resistance and breathability. Additional protective panels and removable level 2 armour protects back, shoulder and elbow impact zones. The Gravel Jacket and Pant is designed to keep you comfortable and safe while adventure riding on road, gravel and trails.

I had a close look for review purposes, took some photos, then returned it.

Front one-way zip is double storm flapped with an added ‘gutter’ fold on the inner flap to slow down water ingress

Quick Look
Adv Spec’s Gravel Jacket came out in late 2024 with matching Gravel pants. Up till now most of AS’s apparel has been gear for more active enduro or trail bike riders who value minimal clobber and may be layering up and down throughout the day. At £549 The Gravel is their top of the range CE AA, all-season jacket pitched at touring riders on bigger Adv bikes which are suited to long road miles and easy gravel trails. Using non-proprietary armour and PU membrane help keep the price down, while ticking many other boxes.

The wicking lining is bonded to the shell fabric, not a separate, loose mesh, which shows taped seams sealing the stitched panels. Ringed: a slot in the back pocket for a hydrator hose.

Out of the box the Gravel feels hefty with all the armour in place, and once on, the fabric is pretty chunky and stiff too – at least while new and compared to what I’ve been wearing lately. (Fyi: I am 6ft 1in/186cm, 210lbs/95kg.)

The 500D, grey nylon body fabric is an abrasion resistant, 3-layer bonded laminate, sandwiching a no-name membrane. That’s the best way to do it, compared separate zip-in liners found on cheaper gear which I like to think have had their day. Oddly, the contrasting woven, 240D kevlar reinforced polyester abrasion panels are also 3-layer. You’d think any simple, tough abrasion-resisting patch would do, and in fact according to the AS table, this 240D is less abrasion resistant than the plain old 500D shell fabric (which is how Aerostitch do their impact-area patches), but helps add a textured look to the jacket. This additional layering will improve water resistance but reduce breathability. It also means these impact-prone areas get no less than seven layers of protection if you include the armour pads underneath. You’re elbows, back and and shoulders will be well protected from impacts.

80-minute, feature-length video? Hard to think the salient facts could not also be packed into a snappy, Mosko-style <5 minute version.

Size wise, new and stiff out of the box the XL Gravel initially felt a bit tight on me. But once the back protector was removed it felt much more comfortable, even wearing my Mosko electric puffa over a denim shirt – a typical riding set up for cooler temps. Sleeves are long, so is the back while the front is short. More dims below.

Adjustability includes two cinch pull tabs along the hem sides – it took a close look to work out how to operate them – plus velcro cuffs and another cinch at the back of the neoprene-edged, unlined collar.

Armour
Underneath and inside, five pieces of A-Spec-branded armour sit in pockets velcro’d to the shell’s interior. I wonder if an included back protector is mandatory to secure a CE AA rating. While good insurance for high-speed crashes, as said, I found the Gravel much more comfortable without the back plate (as I do with most jackets). On the scales this back pad weighed 565g, or over 20% of the jacket’s overall weight.

An elastic waist strap is sewn to the nylon sleeve housing the back pad (above left; below). They call it a ‘kidney belt’ but that’s something else: a stiff girdle-like band which MX racers use to support the lumbar region and keep their organs in place. All this stretchy band does is pull in the base of the back protector which may help keep out draughts. That could be even more effective with a couple of belt loops on the sides of the inner shell to pull everything in. When not used, the belt dangles down, or you can tuck it out of the way behind the back armour (below right). You’ll also notice a half-zip to join up to Gravel pants for the same draught eliminating effect.

On the arms, the two pairs of shoulder and elbow armour came in at 514g. I’d be happy to leave those in place, but by comparison the more pliable and slimmer D3O on my new Klim weigh 380g and could be easily swapped into the Gravel’s armour sleeves.

The whole elbow/shoulder armour thing must be another CE requirement, but it won’t stop over-the-bars broken collar bones. Some jackets I’ve had included a bicep cinch strap to pull in baggy arms out of the mirror line, while also keeping otherwise loose elbow armour in place. If you’re serious about armour, remove everything from the Gravel to save over a kilo, and wear something like A-Spec’s padded SuperShirt. It’s yet more clobber, but will probably be way more comfortable and effective.

Venting air flow looks a bit constricted on the Gravel, but then I’ve not actually tried it. On the forearms you have a couple of short, mesh-backed zip vents (above) which it’s hard to see being very effective. There’s another set on the upper sides of the chest with exhaust vents on the shoulder behind (below left and right).

Apertures are on the small side and will be better than nothing, but as on other jackets, the trend for mesh backing means they can’t open fully to get a flow on. For more venting you might as easily open out the cuffs and unzip the one-way front zip, then do some of the poppers back up. Or, do as Dave did in the Comments, and cut open the mesh to maximise the flow.

Pockets add up to a couple at the hem (below left), and another pair outside on the chest but behind the poppered storm flap (below right) which means you don’t need to open the main zip to access them. Water-resistant zippers up here mean that a passport, wallet and phone ought to be well protected from downpours, but condensation in a pocket may add humidity.

On the back is a huge ‘game pocket’ with studs over another water resistant zip. I find pockets like this a handy place to stash essential but rarely needed items which you never want to be parted from. It’s a long time since I’ve been as supple as Olga Korbut, but I was able to open both poppers and slide the zip while wearing the jacket. They don’t mention it, but inside the game pocket is a buttonhole slot to feed out a long hydrator hose. It would have to come out around the neck – close enough to your mouth – but means you can dispense with wearing a hydrator daypack, another clobber ‘win’!

For comparison I tried on my new Klim Traverse GTX (to be reviewed). It felt flimsy by comparison – or you could say it felt a whole lot lighter and less clobber-like, while still being Gore-Tex waterproof and armoured at the arms.

As I found with Mosko’s similar Basilisk, the Gravel Jacket would be too heavy for the sort of easy trail biking I do in Morocco. Road touring on a big Adv you’ve already surrendered off-road agility for all-conquering road manners, and something like the Gravel Jacket, or even the full outfit, will add to your feeling of invulnerability.
Thanks to Adventure Spec for sending out the Gravel for a quick look.

Tested: Kenda Big Block review

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The chunky Kenda Big Block has been on my ‘tyres to try’ list for years, so when I set off for Morocco on my near-new 450MT last October, I arranged for a 140/80-18 (7.1kg) and 90/90-21 (5.2kg) to be dropped off in Marrakech, assuming the bike’s stock CSTs would not last long or soon degrade. I know John M from Rally Raid is a fan of the Kendas (below).
The rear is listed as 140/70-18, but I’m told this size is rare, so the 140/80 rear Kenda would be a bit wider, taller and probably heavier.

In the meantime, road and trail, I was quite impressed with the stock Cheng Shin (CST) Ambro 4s which bear a striking resemblance to the Pirelli Scorpion Rally STR.

With probably a 1000 miles left in the Ambros (above left) at around 4600 miles, I decided to get the Kendas fitted in Marrakech while I still had a chance to test them on the trail, before heading back home across Spain. Out of town, as expected they initially felt odd on the road, like new knobblies can do. That settled down, hummed a bit more than the CSTs on smooth asphalt, but later on the dirt they felt too stiff at 30-psi road pressures (like many tubeless tyres), spinning out when stalled on a steep ascent, for example. I dropped to the mid/high 20s, but there felt little difference on the rocky or gravel tracks. Some bends I’d slice through like a pro, others I edged round like like a junior MX-er on their first day out.

On a heavy bike like the loaded 450 (195kg wet + gear) it can be hard to get your flow on some loose, stony bends. Meanwhile, on the few bits of deep sand (rare in Morocco), I did notice the 450 tracked well once you’d disabled the traction control. That’s as you’d expect with big blocks, though I think is also down to the 450’s unusually good steering and weight distribution.

On the road the Kendas still gave their moments: Once back on bendy mountain roads in southern Spain, I wasn’t cornering the way I could on the Ambros. A lot of this must be down to knobbly-on-asphalt syndrome: some rough or grooved surfaces set the tyres shimmying, even in a straight line. I’ve been used to that for decades and you just ride through this, but on the bends was another matter. Are the Big Blocks a knob too far?

Riding damp, winding mountain backroads from Seville to Granada, I had a couple of slips and at one point was so sure both tyres were punctured, I pulled over to check. Both were solid as. It wasn’t icy but I thought maybe I’d ridden through some unseen, oily agri-slime, or the dealer service in Seville the previous day had whacked up the pressures. Both tyres checked in at the regular 30psi.
On other occasions I thought perhaps the rubber needed to warm up in the chilly morning temps. This uneasiness came and went right across Spain until I thought: I can’t sell this bike with these Big Blocks, even if they make the bike look rufty-tufty and purposeful. Whoever buys it is likely to be a road rider. Once back in the UK I fitted some Mitas E07s (below) and will flog the Big Bs.

Yamaha’s XT Ténéré travel bikes

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My Tenere Travels
1982: XT500 • Algeria
1985-86: XT600Z 55W• London–Dakar
1987-88: XT600Z 1VJ • Algeria
1990: XT600Z 55W • Marseille–Mauritania
2007: XT660Z • Morocco
2018: ‘Tenerised’ XScrambleR 700

I well remember the day in 1983 when I first clocked Yamaha’s original XT600Z Ténéré outside Maxim Motorcycles in Parramatta, west Sydney.

I crouched down for a good look at the machine which appeared to have addressed just about all the deficiencies of my 1982 XT500 desert bike: front disc brake, huge 28-litre tank, monoshock back-end, 12-volt electrics, folding lever trips, oil cooler and a thrifty ‘twin-carb’ set up. And all at around 140 kilos dry.

The 34L XT600Z Ténéré, named after the most gruelling Saharan stage of the Paris-Dakar Rally (see below), was desert-ready right off the showroom floor.

‘Tenere’ – What’s that then?

Tenere – or as the French write it: Ténéré – is one of the many Tuareg words for ’emptiness’ or ‘desert’. The more familiar Arabic Sahra [Sahara] means the same thing, but like the Inuit and their snow, the nomads of the Sahara distinguish between many types of desert and regions. The Tenere is a particularly desolate and waterless flat expanse which fills the northeast corner of Niger (left).

In the Dakar Rally’s 1980s heyday, the crossing of the Tenere from Algeria to Agadez in Niger via the dunes of the Bilma Erg, typically decimated the field and helped establish the Tenere’s already notorious reputation of the ‘desert within a desert’.

In 2003 we rode to the famous Arbre Perdu or ‘Lost Tree’ in the northern Tenere (below) where Dakar Rally founder Thierry Sabine had his ashes scattered following his death during the ’86 rally.
Good French page on vintage Dakar and all the Teneres and similar bikes.

I bought my first Ténéré in London in 1985 to tackle my own London–Dakar adventure. This was the slightly modified 55W version of the original 1983 34L, produced for just one year. The changes were small: front disc brake cover, stronger DID rims, revised chain adjuster, longer, all-red or blue seat and most easily spotted: sloping speed blocks on the tank.
Modifications to my 55W amounted to nothing more than adding thicker seat foam and some Metzeler ‘Sahara’ tyres – a rubbish choice for the actual Sahara, even back then. Using no rack was another mistake which nearly cost me the bike when my baggage caught fire.

In fact, there was so little to do that I went to the bother of moving the oil cooler from next to the carbs up out into the breeze over the bars. And I painted it black because I was still hadn’t shaken off my juvenile Mad Max phase. With my £5 ex-army panniers slung over the back, in December ’85 I set off for Marseille, bound for Dakar via Algeria, Niger and Mali.

85xt60-dakarmap — My 1985-86 route to Dakar in green.

This was my first overland trip which succeeded in actually crossing a few African borders – and it proved to be as eventful as my first Sahara ride on the XT500 (and the Benele quickie which followed). On the way I learned many must-do-next-times as well as several more never-do-agains, all useful material for my Desert Biking guide published a few years later and which evolved into the current AM Handbook.

Blazing saddles near the Niger border

I met Helmut in Tamanrasset and we set off across the Sahara together. Sadly he crashed and burned, never to reach the Niger border. I also had a smaller fire a day or two later, but was thrilled to have finally crossed the Sahara into West Africa.
As I wrote later, reaching sub-Saharan Africa was like switching a TV from black and white to colour.
A few weeks later, with many more adventures and worthwhile lessons under my belt, I shipped my charred Tenere out of Dakar and flew on to Spain to catch up with it. You can read the long version of that trip here.

tenere85 — Camped by the Niger river, Niger

Yamaha’s original 34L and 55W Ténéré was the first proper, well-equipped lightweight travel bikes, created on the back of Yamaha’s success in the Dakar Rally which I encountered on a few occasions out there.
That bike – not the BMW R80G/S everyone goes on about – was a game changer, with the brakes, range, suspension, economy, power and lack of weight which ticked all the boxes. In Europe they absolutely loved them; over a decade the French alone bought 20,000 Teneres; over 30% of all production. They were never officially imported into North America. From 1987 the KLR650 filled the same niche but in Europe the KLR was largely ignored and Suzuki DR600s and 650SEs made a bit more of an impact. A good early-Tenere page.

The next Tenere was the 1VJ model (left and above) with kick and electric start, firmer suspension and the air filter positioned, rally-style, under the back of the tank. But costs were cut elsewhere, it supposedly had over-heating problems and it just didn’t seem as durable as the original kickers. Mine sounded pretty clapped-out by the time I returned from a 3000-mile Sahara trip.
You can read about my 87-88 trip here.

I never owned one, but the classic twin-lamp 3AJ Teneres (above and left), was said to be a better machine, even if it had by now gained some 25kg. There was said to be a 5th gear problem common to other 600 Teneres, but only if you rode them very hard and lugged the motor.

The 5-valve XTZ660 Tenere from the 1990s (left) still looked great but by now had gained even more weight and lost some cred. On top of that, poor electrics and other flaws managed to lose the Ténéré mojo in the face of KTM’s dirt-focussed 640 Adventure (right).
After the 5-valve was dropped, for nearly ten lean years in the Noughties there were no Teneres in production. BMW’s 650 Dakar became popular big single travel bike; Teneres were seen as an 80s throwback.

Then, in 2008 Yamaha’s legendary desert bike returned as the XT660Z. Based on the injected XT660R and X produced from 2004, the fuelling was much improved and again, it ticked many boxes, even if it now weighed over 200 kilos and, at times, felt it. Fuel consumption varied widely but averaged 25 kpl, giving a range of about 570km/360 miles from the 23-litre plastic tank.

I bought a barely used one soon after they came out, did the usual kerbside makeover and set off for Morocco to research the first edition of Morocco Overland. Read about that bike here.

By 2016 ever-tightening emissions regs killed off the hefty 660Z Ténéré. but 2019’s long awaited XT700 Ténéré, based on the brilliant twin-cylinder CP2 motor, as in my 2017 XSR700 has become a worldwide hit (read my early impressions here). Though taller, a T7 is not much heavier than the 660Z and just like the original 34l, is another desert-ready hit right out of the crate.

Adventure Motorcycling Handbook

The Website of the Book