R1 or R6 throttle tube?

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I'm gunna do the r6 throttle tube this week. I'm just a bit confused with the grip? As it comes with a grip, does it mean my busa one won't fit?
And is 2004 the best year r6 to use??

You can still use your busa grip just remove the one on the tube. I used the 2004 one and it works fine.