I think he's running pods and baffled straight pipes but with stock jetting in BS34s. He's probably lucky it goes as fast as it does, lol. To get the most out of this or any bike, you want everything set to proper specs - cam chain, valves, timing, and of course, carbs properly jetted for your mods. Have all this stuff just a little off and it adds up to a poor running and/or performing bike.
My recent test run that I mentioned was taken after a minor timing adjustment. I retarded it a degree or two and wanted to see if I'd lost any performance. In fact, I think it runs better this way. I've had it to the ton before but it just seemed to go there more willingly this time. Yamaha updated the timing specs on these bikes way back in '71. They advanced it a couple degrees supposedly "to permit smoother and more synchronized idling". That may very well be but I think bumping the full advance to 40° BTDC from the previous 38° spec may diminish high RPM and high speed performance a bit.
My recent test run that I mentioned was taken after a minor timing adjustment. I retarded it a degree or two and wanted to see if I'd lost any performance. In fact, I think it runs better this way. I've had it to the ton before but it just seemed to go there more willingly this time. Yamaha updated the timing specs on these bikes way back in '71. They advanced it a couple degrees supposedly "to permit smoother and more synchronized idling". That may very well be but I think bumping the full advance to 40° BTDC from the previous 38° spec may diminish high RPM and high speed performance a bit.
