F'N JAP Built YAMAHAMMERS!
Seen a few Things cause problems on that Machine!
One of them had never had the Valve Turned to 'RESERVE' for several years!
All the BS/Dirt accumultated in the bottom part of the Fuel Tank & when it finally was turned to reserve it Filled the Carb with all kinds of BS!
Take that Tank off & Make sure it is Clean/Spotless!
The ON/OFF/RESERVE Valve on that Machine is Famous for small pieces of Rubber breaking off when it's Turned & the Debris ends up in the needle valve/Needle & Seat in the Carb!
Rule # 1 when working on a Yamaha:
Squint them eyes!
Back Me Off to 1,700 Yards,650 is a Little Close & I'm Not Comfortable with it!
A GUT SHOT at 1,700 Yards will Still Make Some Good BRAGGIN Rights so I Can Say I At Least Hit Him!