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Discussion Starter #1
ok,heres a few yammatrivia Qs for u yammadudes 1 what year did yamaha introduce the gp models and what sizes could you get? 2 what was the size of the motor in yammas firt muscle sled and 3 what was yamahas first free air sled called?
 

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size i guess 433 292 not sure on the 643

750 92-depends on what ya meant on the muscle question

If pulling it would be SW(had a wide track SW396:p)lots of pulling muscle:p

I had an GPX 338:p but think they might have had an earlier aircool racer
 

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First GP model was in 1971, (only one GP model that year).

It was a 396.

The first muscle sled engine size was a 433 ???

First free air sled....292 ???
 

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Discussion Starter #4
all great answers...on the muscle sled i was lookin for 643
 

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"1 what year did yamaha introduce the gp models and what sizes could you get?"

1971 396cc

"2 what was the size of the motor in yammas firt muscle sled"

The first that Yamaha called "muscle sled" was 1970 SS also the first intoduction of the Yamaha GYT kit for racing.
The 1970 SS was 338cc and 396cc.

"what was yamahas first free air sled called"

In 1971 Yamaha rolled out a small race F/A sled SR 433 to take on the Goliath 3 and 4 cyl 650cc and up race sleds of the other makes.
 

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Discussion Starter #6
thanks toydoc,i was wondering if you would jump on this one!!!
 
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