Kevin Gonyou races what appears to be a 1970s era Yamaha 125 GP bike at Grattan Raceway in July of 1985. Gonyou scored some solid finishes in the WERA Formula 3 class that season. Racing 125cc GP bikes was quite popular in club racing in the 1960s and into the ‘70s, but the tiddler machines became a rare breed in the 1980s. They experienced a resurgence in the 1990s and became popular enough that the AMA briefly had a national 125GP road race series in mid-‘90s.
Kevin Gonyou races what appears to be a 1970s era Yamaha 125 GP bike at Grattan Raceway in July of 1985. Gonyou scored some solid finishes in the WERA Formula 3 class that season. (Larry Lawrence photo)
Rider Files 
Is it possible that it is a 125 twin? There appear to be two chambers below the engine.
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Must be a TA 125, but is that a TA front brake?
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It is a Yamaha TA-125, twin air-cooled motor.
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Great photo. Kevin really is as old as he claims he is ..
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Tricked out RD125 ? Not likely I know with the small air opening in front of fairing but…?
Looks like a magnesium twin leading shoe, vented Grimeca front brake. Trick stuff!
DH
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No use for thieves
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