Simplified Tuning | Boyesen Engineering Twinshot
By Jordan Mastagni, Photography by Jordan Mastagni
7 We slid the new, tighter Twinshot spring on the pump rod and replaced the cotter pin.
8 Next, we installed the Twinshot's plunger arm in the back of the lever (arrow).
9 The Twinshot was ready to be installed. It slid right into the carburetor and the new plunger arm into the new plunger arm boot.
10 The stock float chamber bolts were reused to tighten the Twinshot to the carb.
11 After we tightened the last bolt, we reinstalled the carb to the intake manifold. Once in place, we set the fuel spray adjuster (arrow) to one turn out from the closed position as the instructions directed us to do.
12 Lastly, we put the air cleaner assembly back on and turned the fuel from the petcock to the "on" position. On a test ride we immediately noticed the snappier throttle response. As soon as we rolled back on the throttle the bike accelerated better than what we were used to. And when we take it up to the mountains, we can make on-the-fly adjustments to compensate for the elevation/air pressure changes.
By Jordan Mastagni
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