2001 busa strange "shutter" issue while holding 70-75 mph

[Superzuki]

It also needs air to run, if it's not restricted fuel, maybe it's restricted air.
I had an 1100 Katana that almost drove me over the edge, until I double checked the air filter box.

 

[1bondoman]

Btw. What you are describing has nothing to do with the clutch.

 

[AZIROC]

Did you ever bypass kickstand safety? Or at least zip tie the switch to the shut position?
I just had ANOTHER one that the kickstand safety was the issue. Last week as a matter of fact.
The guy thought he was going to have to buy a fuel pump and some other stuff. He was so happy when I fixed his bike for free.

Question..... If you ride it like you stole it does it still pull hard all the way to redline? In all gears?
If it's still a beast and and pulls hard to redline in all the lower gears then the fuel pump is fine.
If it bogs when you beat it in the lower gears then you could have a fuel pump issue.
If that is the case I recommend getting a low mile used gen2 assembly. Yes the plug is different but it's easily
spliced.

No, did not try the kick stand switch. How done bypass it?

The bike still pulls hard like day 1 in every gear. It just seems to act up after I've been at 4500 rpms for a time and then I try to go faster.

I will try the kick stand bypass this weekend.

 

[AZIROC]

When I took the pump out to replace the filter I cleaned the air filter and everything was still good

 

[1bondoman]

Either take a big ziptie and strap the push pin in or cut the wire and splice it together.