Hang on, need to be careful I don't give you a bum steer here as I have only fitted them on my MV... that said I have replaced the grips on my HP with aftermarket (Grip Only) as the heating element is bonded into the throttle tube, if you have a Gen 3 it's different from 1/2. Both 1/2 I believe have the fine copper element wound round the tube/clutch side, the 3 is a more robust set up.
The Renthals on the HP are 120 mil in length reduced to 115mm (Fouling of the weights)
130s fit the MV perfectly, I trimmed a little off the ends just for the perfect fit and so the finished end didn't foul on my bar end/weight (Throttle Side)
So firstly the grip length needed is 130 mil which I think the Yamahas are without checking.. Notice the RED box on the pic of my HP4.. I think there is something or other under my tape which I might take off if need be for a look, if so you might need to fashion that part of the new grip so it slides on OK.
If you want I can whip off the tape... nonetheless if your going to buy the Yam ones they will fit, might just need a mod here or there... send me a text and I'll whatsapp them to you, it would miles easier.. 07779 150 760.
Cheerz