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  NOW SHOWING!!  Behan Classic Motorcycles prides itself on the fine museum quality motorcycles we turn out in our restoration shop!  However, some motorcycles are actually "more" valuable and rare in their original, unrestored condition.  Featured this month is our 1978 Kawasaki Z1R-TC.  Prime examples of this highly collectible motorcycle are currently bringing sales prices in excess of $20,000.  The story of how these bikes came into being is an interesting one.  Read on!!
 

World's Quickest Motorcycle!

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183hp, 9.59 seconds 1/4 mile time, right out of the crate! * (Taken from an early magazine test)

  

The year was 1976. Kawasaki was preparing to introduce a replacement for their aging but extremely successful KZ900, or “Z1“. Designers had penned a new model, the KZ1000 -D1, or simply… “Z1-R“. With its bold angular lines, a sport fairing, increased displacement,  a four into one exhaust system, and cast alloy wheels, designers felt they had hit the mark, and introduced the bike to the world as a 1978 model. It was available only in a unique Stardust Silver Metallic paint. Unfortunately, sales figures were disappointing.

The 1978 KZ1000-D1 "Z1-R" in stock form

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Stardust Silver paint, 1015cc engine, 4 into 1 exhaust.

 

 

  Figuring that the new turbocharged Z1R-TC would beef up Kawasaki’s image as a muscle bike company, they set and waited for the sales reports to come in. Improved, but hardly earth-shattering. Even though these bikes boasted unbelievably impressive performance, the Z1-R just wasn’t the success that they had hoped for. About 250 of these Stardust TC’s were built. The sales team came up with one more idea. They thought the Stardust Silver paint may not have been the best choice for such a high performance bike.

A GREAT collection of TC's!

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Notice the Stardust bike and an early "log" manifold Molly TC

  

Around this same time, American Turbo Pak (ATP) had established itself as a successful vendor of turbocharging kits for the KZ900, as well as other popular bikes. When fitted with the ATP performance kits, these “super bikes” were tearing it up on both street and at the strip, and were the first motorcycles to break the 10 second ¼ mile barrier.

Alan Masek, former marketing exec for Kawasaki, presented an idea to pick up the slow Z1-R sales. He proposed to fit some of the new Z1-R bikes with the ATP turbocharger kits, which would then bring some badly needed attention their way. Kawasaki agreed. Turbo Cycle Corporation was born, and Masek began the fitment of ATP kits to new, crated Z1-R’s right in Kawasaki’s California warehouse! Kawasaki set the retail price of these bikes at a staggering $5000! (The equivalent price of "3" new Honda 750F Super Sport bikes!) And… they would come with NO factory warranty! Only a select few dealers would ever see one.

The TC utilized a superior Rajay turbo and

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Zenith carburetor. Only about 550 were ever built.

Only 250 Molly TC's were ever produced.

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Of those, only about 50 had the log style exhaust.

1978 "TC" Sales Brochure

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           And now....  "The rest of the story".

  In 1979, California passed a law banning the modification of a factory exhaust system. The TC conversions were stopped, and there were to be no more Turbo Cycle bikes manufactured. Only about 250 Molly TC’s were ever produced. They likely remain the rarest production Japanese bike ever built.

  The decision was made to repaint some of the Z1-R bikes still waiting to be converted by Turbo Cycle. They chose Black, and the paint was applied right over the original Stardust color! A California specialty company called Molly Graphics would design a brightly colored striping scheme over the new black paint to make these bikes really stand out. In addition, ATP had made some improvements to their turbo system, and those would also make their way onto these new TC’s. These new bikes would forever be known as the "Molly TC".

  Pretty soon, these Z1R-TC’s were shattering drag racing records everywhere. With over 180 horsepower on tap, the “stock” TC could reportedly run a ¼ mile in around 9.59 seconds! At the time it was the “quickest production motorcycle” And, the new Molly paint scheme made certain that EVERYONE knew who manufactured it! The TC bikes sold out quickly in 1979. Kawasaki sales finally increased, and the experiment was deemed a success. But wait…. This isn’t the end of the story! 

Boost was originally preset at 6-8 psi.

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A simple adjustment screw allowed owners to set the boost where they dared!

Ok!  I am NO "historian" here.  Just telling the TC story as I have come to know it.  Production numbers are a bit sketchy.  Some early bikes had alarm systems, etc.  There are some unique parts that were used during different periods of assembly,  but generally, the bikes are pretty standard.  Early models and late models vary a bit.  As I understand it, there were 3 stages of performance available:  "Stage 1" was typical of the majority of the bikes:  Boost set to 6-8psi, 15psi boost guage, and standard kit parts.  Approximately 120hp. "Stage 2" included the above, a deep sump oil pan with trap door, 30psi boost guage, and wastegate set at 10-12psi.  Approximately 150 hp. "Stage 3" included all the above, plus special turbo pistons, welded crankshaft, 15psi of boost, etc.  The engine had to be removed and sent in to ATP for these mods.  As much as 180+ hp! I hope you enjoyed the article!  Ride safe!  KB
 
*Stage 3 specs.  The bike actually featured here is a Stage 1 with optional deep sump oil pan and welded main journals.