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DocDrop @ Feb. 18 2008 said:
1299612[/ATTACH] AM]
This is my sisters busa, its an 03. I got on it to see what she was talking about. You start out in first not problem you shift into second no problem till you hit around 35 mph, then the bike starts to buck/surge if you keep throttling up it starts to buck/surge more then you get tired of that and you shift up and the rest of the gears all run out fine. What do you think it is.
Doc,
Sounds like the Shift fork/Shift shaft 2nd gear issue. The dreaded 2nd gear issue. Likely at this point the dogs are rounded on the gear.
Check this thread
https://www.hayabusa.org/forums/?act=ST;f=10;t=58267;hl=
Actually there are several. Partial list of threads some of which have good info.
https://www.hayabusa.org/forums....end=&p=
Fix is going to be splitting the case and taking a look. You can just about count on two gears (they may be able to be saved by backcutting) 1-2 forks shift shafts and possible drum damage.
I rode a bike with the issue and is sounds/feels just like that.... only in second.