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Retrospective: Yamaha VMX12 V-Max 1200: 1985-1986 (also 1988-2007)

Clement Salvadori
December 31, 2013
Filed under Retro + Vintage Motorcycle Reviews, Yamaha Motorcycle Reviews

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1985 Yamaha VMX12N V-Max

1985 Yamaha VMX12N V-Max. (Photos by Clement Salvadori)

Too modern for Retrospective? Perhaps not. The V-Max appeared back in 1985, was on the books for ’86 then skipped ’87, only to reappear with new wheels in 1988, then lasted with minor changes for the next 20 years. This ’85 gem is the original.

The V-Max was a genuine butt-kicker, the likes of which had never been seen before. Yamaha called it a “muscle” bike, but if it were compared to Arnold pumping iron in ’85, he would have been stricken from the competition due to overuse of steroids.

1985 Yamaha VMX12N V-Max

1985 Yamaha VMX12N V-Max

The V-Max was all about muscle, little to do with practicality, even handling. The Japanese felt that the way to serious muscle was with a V-4, and the Max’s rear wheel showed 120 horsepower, with a 10-second (barely) quarter-mile. Its closest competition was the Honda Magna 1100 with 100 horses, and a half-second slower in the quarter. Third was Suzuki’s Madura 1200, with a mere 90 ponies and a quarter in the high 11s. Kawasaki, sensibly, decided to stay away from the internecine V-4 struggle.

The project was probably defined as building the most powerful cruiser yet, as cheaply as possible. At the Hamamatsu end, when the OK to go ahead was given, engine guru Mr. Ashihara was told to get some real horsepower out of the rather benign Venture touring motor, which was rated at about 90 horses. And Mr. Kurachi, the body designer, was detailed to create a look that would not be forgotten.

1985 Yamaha VMX12N V-Max

1985 Yamaha VMX12N V-Max

The 1,198cc Venture engine was a big-bore, liquid-cooled 70-degree V-4, with a 76mm bore and 66mm stroke, dual chain-driven overhead camshafts, four (shimmed) valves per cylinder and counterbalancers to limit the vibes. To give it more

performance, the cams were reground to provide increased low-end power, but it was the top end that achieved startling results. Basically, the more combustibles one can jam into the cylinder, the bigger the explosion and the more power. The valves were increased in size, and the Venture’s 34mm Mikunis were upped to 35mm, with each cylinder fueled by its own carb. And then something new was added: V-Boost. To over-simplify Ashihara’s V-Boost concept, at 6,000 rpm a little servo-motor kicked in and began opening a butterfly valve that separated the intakes of the two carbs on each bank of the V-four. And since the pistons were on different strokes, one side was not stealing from another. The boost was complete at 8,000 rpm, with the power maxing at 9,000 rpm. Cram that fuel in, spark the plug, and the factory was claiming 145 crankshaft horses.

1985 Yamaha VMX12N V-Max

1985 Yamaha VMX12N V-Max

There was one minor drawback to all this complication with the air-induction system, which included a large airbox under the cover that looked like a gas tank, and that was that the fuel tank had to be placed under the seat and held a mere four gallons. With “average” fuel consumption in the low 30s, this meant the bike had about a 100-mile range before the rider began to worry. But in truth, the V-Max was not intended to be ridden more than a century at a stretch, one reason being the rather uncomfortable saddle. The neophyte needed to learn that when the low-fuel warning light came on, the switch for the reserve was a button by the right thumb.

Power passed through a 5-speed gearbox, vaguely similar to the one on the Venture. Gear ratios had been altered, with the gears reinforced and a new diaphragm clutch to help control all those horses. Final drive was by shaft, surprisingly, but obviously the engineers felt the engine was so strong they could waste a few horses.

1985 Yamaha VMX12N V-Max

1985 Yamaha VMX12N V-Max

The frame was a workmanlike tubular-steel cradle. The air-adjustable 40mm Kayaba fork was connected, fortunately, so only a single valve was needed; rake was a stable 29 degrees, trail, 4.7 inches. The twin shocks, also Kayaba, had preload and rebound damping adjustability. Reviewers generally liked its road-holding characteristics, but apparently did not want to try it out on road-racing tracks, so the lean-angle limits never seemed to be mentioned. It was certainly no competition for the FZ750.

The front wheel was an 18-incher, with a 100/90 tire and a pair of 282mm discs with two-piston calipers. The rear mag was a whopping great (for the time) 3.50 x 15, sporting a ginormous 150/90 piece of rubber. With a tire that big, the bike did like to stand up in the corners. And if the rider chose to ride in straight lines and flatten the middle portion of the tire, the tendency to stand up was increased. A two-piston caliper squeezed a single disc at the back.
Dimensions were weighty, almost 620 pounds with fuel in the canister. And lengthy—more than 62 inches between axles—much due to the drive shaft that was built long in an effort to reduce the infamous jacking aspect.

1985 Yamaha VMX12N V-Max

1985 Yamaha VMX12N V-Max

And the look was good. The angular cruisers that the Japanese had introduced in the early 1980s were more interesting than appealing, but the flair that Kurachi created was to become almost legendary. Namely with the fake scoops that looked as though they rammed air into the carbs. The big speedo up above the headlight had rather a Vincent Black Shadow look. Our 1985 photo model has the dealer-installed pinstripe kit, a factory option.

The V-Max immediately muscled its way to the lead in its category. The competition dropped out after 1986, Suzuki discontinuing the Madura, Honda the big Magna. Granted, this was a troubling time in the U.S. economy, as a middling recession had begun in the early 1980s. Unsold bikes, “non-currents” being the operative word, were everywhere, and even Yamaha did not produce a 1987 V-Max, having too many ’86 models left in showrooms and warehouses.

While the naysayers began to write obituaries, the V-Max came back in 1988, with new wheels. Future changes were minor: In 1990 the ignition was upgraded to digital electronic, and in ’93 some chassis changes were made, with 43mm fork tubes bolted on to do away with any flex. It received a few additional mods, but the V-Max stayed pretty much the same old, same old. Because it still garnered new customers. Impressive.

(This Retrospective article was published in the January 2013 issue of Rider magazine.)

Comments

3 Responses to “Retrospective: Yamaha VMX12 V-Max 1200: 1985-1986 (also 1988-2007)”

  1. Justin P. "Biker Dash" Emery on May 1st, 2014 3:52 pm

    As an owner of a 2003 Max, (named Woona) and a life long fan of these incredible machines, I thought I would give my impressions on the bike.

    Ok, it was mention about barely being a 10 second bike. While the brony in me would dream of running ten seconds flat, (Kudos to the first staff member who researches the reference) I find that the machine stock would only have a possibility of breaking into the 10’s if Valentino Rossi lost 50 lbs (from his 130 lbs) before launching. This is not a Busa, people.

    Ok. I must be the strangest person in the world, because I actually find the seat quite comfortable. I especially love the rounded profile which is nice when at a light. I do admit, just about every other V-max owner I have talked to says the seat could be way better.

    You mentioned flex. That is something that amazes me, that Yamaha would build such a powerful engine, and place it in a frame and suspension combo that was pretty much an advertisement for Slinky. Granted, he situation did improve when they moved to the 43mm forks, but not enough, in my opinion. (And other riders’ opinions as well, I would guess, considering how many V-Max’s I see on the V-Max Forums with frame braces attached.)

    You said that the reason for the length of the swingarm was Yamaha’s attempt at reducing the jacking effect. Well, that arm must not be long enough, after watching the bike do a pull on the chassis dyno. Woona’s butt lifted what looked like three inches when Randy cranked the throttle! In the battle against jacking: Horsepower -1, Yamaha engineers – 0.

    One detail I am curious if anyone has noticed. I see that the bike pictured in this article is an 85 model. but if you look closely at the forks, you can see that the later model shields have been added. I would guess either aftermarket, or the owner swapped out the 40mm front end for a newer 43mm set of forks and clamps.

    Overall, I love my Woona. I do have a lot of plans for her, and he is the one bike I will keep forever.

    Excellent article! I would love to see some modded V-max’s featured sometime.

    [Reply]

  2. Daniel rice on June 19th, 2014 8:02 pm

    My motor in my 1988 vmax is shot. Can I replace it straight over to a 2000 vmax motor I found for sale? Is there a difference mechanically or electrically? Mine is a vboost and I need the entire top end and carbs. Thanks.

    [Reply]

    Lance T Smith Sr Reply:

    Contact Jon Cornell at UFO Cycles. He should have work for Yamaha in helping to develop The VMax. He also have refurbish engines for sale and pick up.

    [Reply]

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