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Yamaha Variable Compression Ratio 500cc Race Bike


Snakeroad
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Hello all, I am looking for an article from Performance Bikes Magazine that had a V4 500cc race bike with variable compression ratio using hydraulics. I think it was one of Wayne Rainey's bike. Anyone remember? Thank you in advance.

:D

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Hello all, I am looking for an article from Performance Bikes Magazine that had a V4 500cc race bike with variable compression ratio using hydraulics. I think it was one of Wayne Rainey's bike. Anyone remember? Thank you in advance.

:eusa_whistle:

Yes, the head inserts would drop at low engine speed, raising the compression and then lift at higher speeds to reduce detonation. I probably have the article somewhere but I have no idea where....

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