Key performance

52 ch
Power
🔧
942 cc
Displacement
🏎️
170 km/h
Top speed
Compare the Yamaha XV 950 Yard Built - GS Mashin ULTRA - with: Choose a motorcycle →

Technical specifications

Engine

Displacement
942 cc
Power
52.0 ch @ 5500 tr/min (38.2 kW)
Torque
79.4 Nm @ 3000 tr/min
Engine type
Bicylindre en V, 4 temps
Cooling
par air
Compression ratio
9 : 1
Bore × stroke
85 x 83 mm
Valves/cylinder
2
Camshafts
1 ACT
Fuel system
Injection

Chassis

Frame
Double berceau tubulaire en acier
Gearbox
boîte à 5 rapports
Final drive
Courroie
Front suspension
Fourche téléhydraulique Ø 41 mm
Rear suspension
2 amortisseurs latéraux K-tech

Brakes

Front brakes
Freinage 1 disque , étrier 2 pistons
Rear brakes
Freinage 1 disque , étrier simple piston

Overview

Imagine a standard XV 950, this road bike with a 942 cc V-twin engine, rather restrained with its 52 horsepower. Now imagine that a detail-obsessed Swiss artisan kidnaps it and subjects it to a radical reinvention treatment. That is the essence of the GS Mashin "Ultra" Yard Built project, where personalization becomes a martial art, almost a mechanical sculpting act.

Yamaha XV 950 Yard Built - GS Mashin ULTRA -

Tom Mosimann, the young head of GS Mashin, took this base and extracted a silhouette that seems to have come from a cyberpunk novel mixed with gothic influences. The result is a lowered machine, almost sprawling, with disproportionate wheels – 21 inches at the front, 18 at the rear – which give it the look of a futuristic and sporty cruiser. Everything is designed to be clip-on, modular, in bright colors that contrast with the usual black of custom bikes. And the original frame? Intact. This is the sacred rule of Yard Built: do not cut, do not weld the steel cradle. A constraint that forces ingenuity.

The craftsmanship here is raw, almost primitive in its methods, but with surgical precision. Mosimann shaped the fairing and tank from simple 1.5 mm steel sheets, using an angle grinder, a sandbag and a hammer for most of the work. It’s old-school metal-shaping, but with a new vision. The Bates spotlight, the integrated Highsider turn signals, the machined aluminum top triple clamp without holes for the risers: each element is an assumed aesthetic choice. And these prototype K-Tech rear shocks, inspired by Bullit, are not just for looks; they promise serious handling.

This Ultra is not a motorcycle for novices or classic touring riders. It targets the aesthete, the collector, the one who sees a custom as a mobile work of art. With its twin cylinder delivering 79.4 Nm of torque from 3000 rpm, it remains usable, but its appearance and giant wheels are more suited to exhibitions or styled straight lines than tight turns. It is a statement, a stylistic exercise that places GS Mashin among the greats of European personalization, where the idea takes precedence over simple modification.

Compared to other customs based on the XV 950 or even Harley Davidson Street models, this Ultra stands out for its conceptual radicalism. It does not seek nostalgia, but a form of architectural modernism. Its price, certainly high, is that of a work of art. For Yamaha, this project shows that their Yard Built platform can be a playground for the most daring talents, those who push the limits of the possible without altering the machine’s DNA. A success that impresses, even if one can question its daily use on the road.

Practical info

  • La moto est accessible aux permis : A

Indicators & positioning

🔧
Volumetric power
54.5 ch/L
In category Custom / cruiser · 471-1884cc displacement (3570 motorcycles compared)
Power 51 ch Top 77%
40 ch median 68 ch 123 ch

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