Scott Zampach (204) leads John Eidenberger (17) and Scott Russell (22) in a late 1980s Michigan Grand Prix at Grattan Raceway. The trio finished in this order with Zampach taking the victory. (Larry Lawrence photo)
Z-Man, Eidenberger and the Chief
Rider Files
Our Life and Times in Motorcycle Racing
Rider Files 
Eidenberger, my recollection is that he came out of nowhere went blazingly fast and then disappeared back where ever he had come from. My memory also has him cataloged as a really nice guy too.
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Ed
John was really fast and you’re right, he came and went in a blaze.
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hmmm, Eidenberger sounds similar to Bart Peterson- one of the few guys to beat Polen when Polen was on that famous $uzuki Cup tour. Bart woulda been big if he’d continued. Last I heard, he was a successful motorcycle dealer.
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This shows the level of talent Z man had.Although mostly known for the HD series he did great on supersport, production and endurance bikes.
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I wrenched for Johnny, met him at RA as novice then following season ran lots of weekends, he raced motocross for a long time, guy was in great shape, one weekend we did pit road hand offs all day, fzr400, fzr 750, fzr 1000 , gsxr750, gsxr 1100 and Hurricane 600 I think he made over 4 G one weekend.
He had a 600 katana, too.
We ran a club brainerd, ran full throttle on one and two pretty much destroyed locals
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