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P.C. (Preposterously Clean) – 1973 Kawasaki H1 500 Mach III

It would have been almost impossible to find an H1 in this condition in the mid-1970’s, Mach III’s generally obscured by dirt accumulated in the oily mist coating the bike.  This one has had a nice restoration and the auction still has a couple of days to run.

1973 Kawasaki H1 500 Mach III for sale on eBay

Back in the day, the only way to approach 100 hp per liter was with a two stroke, and while Honda had moved on, Suzuki still had a competing 500.  The basically square cylinders ( 60 x 58.8 mm ) resulted in 60 hp at 7,500 rpm.  The chassis was unfortunately not up to the task, put in a lot of over-exuberant situations.  Brakes were the usual, that is to say wholly inadequate, but this owner has added a second front disk.

A sparkling restoration and though the owner doesn’t divulge who did the work, the carefully detailed engine and wheels look great.  From the eBay auction:

The following services have been performed:
* Rebuilt Crankshaft, bearings, seals and gaskets 
* Pistons & rings (.50 over)
* Rebuilt Carburetors rejetted w/pods
* Fork tubes, seals & dust boots
* Stock rear shocks
* Triple tree bearings
* Controls, grips and mirrors
* Super bike bars
* New cables
* New signals & stems
* Polished: Engine covers, outer head fins, forks, rear hub
* Rebuilt calipers – Dual brake system with refinished rotors
* 5/8 master cylinder
* Stock brake lines
* original grab rail, brake pedal, shifter, front fender
* re-chromed fork ears, chain guard
* New Paint, decals
* Re-laced rims
* New tires & tubes
* Chain & sprockets 
* replacement clutch
* Original seat 
* Bill Wirges chambers

Reviews raved about the big triple, while things like mileage and changing spark plugs every other oil change were easily forgotten.  But no one’s proposing the H1 as a daily rider in this day and age, especially looking like this.  Wish the owner had attached a video with the sound of those triple expansion chambers…

-donn

8 Comments

  • Calling this flexi flyer a sport bike is pushing it !

  • In 1973 Cycle World did its 2nd super bike shoot out, this bikes bigger bother The H2 won . The H1 handles as good as the H2 actually better .How do i know this i own both, they are not flexi flyers and yes they were sport bikes.

  • For 1973 standards the brakes were just fine , read the Cycle world 1972 shoot out Kawasaki for the win .

  • I had a few Kwackers back in the day and they were weapons at the time-history has not been kind to them however-but viewed in period they were great things – reliability wasn’t so good and they could seize at the drop of a hat – handling and brakes were again of the period – and fuel consumption was horrendous but petrol was cheap.
    They have a very special sound – one unkind comment at the time was that they sounded like a skeleton having a wank in a biscuit tin.
    Probably not the most PC comment but it raised a laugh.

  • I stand corrected Joe.

  • I can’t wait to ride this thing. Damn it’s cool. Thx RSBFS for pointing it out, should be at Iconic in a couple weeks. Gonna be fun! 🙂

    • Awesome, congratulations Adam!

      dc

  • Another bike sold to RSB subscribers excellent

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