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That would have made me 8. Prob not the answer you wanted, but it was what I could vaguely recall
The Shop
Nothing 'homemade' about it. Nor 'Frankenstein about it. YZ125 tanks were slim, and Aluminium, so, pretty bloody light. Which is what it was all about, given the tonnage of the engine.
I remember joyously unpacking a HL frame that came into Competition Development in my late teens, as a frame maker even then, they were things to be admired. Pro Fab, I think made them.
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I think it was 86 - they had problems with it and broke out the Pro Tec HL that he used the year before to race with .
More Pro-Tec Pics
"The four stroke worlds was an easy race for me just because the bike (Hallman/Lundin/Pro-Tec Yamaha) was so good compared to what everyone else was riding. Still, it was a four stroke so it was kinda like a girl with a bad attitude and if you pushed it, it would kick you back! I remember the engine had torque for days…my bike was like a works bike in a field of production bikes."
The spanish Fernando Muñoz testing Yamaha HL in Holland I think...In early 80,s. I believe this bike is very rare prototype.
12" travel, 242 pounds. Wow, 4-stroke MX bikes have come a long way in 37 years.
OMara3 by Wandell Asbell, on Flickr
Pit Row
Chandler on the Kelvin Franks XR500 at the 1980 USGP. Greatest day of motocross I ever attended
Moates cinderella win. And Chandler booming around on the 4 stroke was awsome. 4 strokes sounded bitchin back then against a field of 2 strokes.
From MXA: This was the starting line at the World Four-Stroke Championships at Carlsbad 30 years ago. That is Johnny O’Mara on the far right on a Honda. A close look at the line reveals one Honda, One Husqvarna and one Yamaha—the rest of the field is mounted on blue-framed ATK 604s. Even O’Mara’s bike was a one-off ATK copy. https://motocrossactionmag.com/rumors-gossip-unfounded-truths-31/
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