Cheap Speed: 1975 Kawasaki H1 500 Mach III

1975 Kawasaki H1 500 R Side Rear

Although “Mach III” is a pretty ambitious name for a motorcycle that can only just top 115mph, it probably felt much faster to test riders of Kawasaki’s two-stroke three-cylinder rocket, given the questionable brakes and less-than-secure handling. 60hp might not sound like a big deal today, but it came on in a frantic, two-stroke rush that invoked unintended wheelies, all accompanied by a chainsaw-snarl soundtrack.

1975 Kawasaki H1 500 L Side Rear

The Kawasaki H1 500 Mach III was actually pretty par for the course for big-bore Japanese roadbikes of the 1970’s, a formula that generally included a powerful, sophisticated powerplant suspended in a chassis just barely able to contain the engine’s fury, with brakes added almost as an afterthought. Spindly forks and frame flex led to a reputation for wayward and even lethal handling, in a case like this one.

1975 Kawasaki H1 500 Cockpit

But in a strange way, this was exactly what the US market really called for: in the quarter mile and stop light drag races, power was king, and fuel consumption below 20mpg was no big deal in an era of cheap gas. Buyers wanted cheap speed and the H1 delivered. Brakes? Those are just so you can stop and pick up your winnings after a race, or pull up to the pumps to refuel, right? Handling? Well as long as you can stay in your lane for 1,320 feet at a time, the handling’s just fine, thanks.

1975 Kawasaki H1 500 L Bar Detail

At the time, a lack of refinement in the package might have been considered a distinct disadvantage. Instead, the straight-line speed, combined with a low price point to create a cult bike that was a legend even in its own lifetime.

1975 Kawasaki H1 500 R Side Rear Detail

From the original eBay listing: 1975 Kawasaki H1 500 Mach III for Sale

This is my 75  Kawasaki H1. I purchased this motorcycle many years ago. It is not stock but it’s very retro. It has had motor work, 0.50 pistons, rings, bearings and new gaskets. It also has pods, reconditioned and re jetted carburetors to go with the nice set of chrome Denco chambers. New tires and tubes. The front caliper was also rebuilt with new pads. New sprockets and chain. The tank, side covers and cowl were painted back in the late 70’s and are retro to that time period. The decals were added on and clear coated recently. I don’t think you can get a paint job like this now and if you could I bet it would be very expensive. The large metal flake really stands out. Inside the tank is clean. The chrome is in very nice original condition. I replaced the fork ears with NOS ones a few years back. All the electrical works and it starts up in 1 or 2 sometimes 3 kicks. It runs well and has that snappy two stroke sound . Smooth acceleration and quick braking. I have kept it stored in a warm dry area in my house and has been well taken care of. It’s a very noticeable motorcycle and does attract quite a bit of attention when I do take it out. Frame # H1F-39057  Engine # KAE 109069 mid year production model.

1975 Kawasaki H1 500 Side Panel

As the seller points out, this bike features a gorgeous, period-look metal-flake paint job that may not be to everyone’s taste, but if you’re buying a 70’s Kawasaki, you might as well go all-in. Those Denco expansion chambers are gorgeous as well, and this bike looks to be really well put together. Bidding is very active on this bike, with less than 24 hours to go and bidding just north of $6,000 as I write this, although I expect that to go up significantly before the auction is all over. But if you’re looking for a nice H1, it might be worth keeping an eye on this auction to see if you can snipe yourself a good deal…

-tad

1975 Kawasaki H1 500 R Side

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