I was told that they would stick a piston every time Gerry would leave the traps slowing down. If you look at the photo Jeff Lytle posted earlier you will see an additional linkage going to the Vacturi hooked to the needle valve. That was there so when Gerry could richen the carburetor and slow down without burning a piston. Where could that linkage be now??? Wait I know! Steve Greaves still uses it at the kilos on his speedy twins so they can adjust the needle valve under way...

And to think all this happened a few years before I was born...

J-Dub