I can`t see the picture.
Here`s the message I got:
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I have a vforce on my 96 yz125, which is a very similar bike to the 01 yz. It adds power all the way through like marcus says. It requires a little bit of jetting afterwards, but it is worth every penny!
Since you are changing the intake manifold, it changes how the fuel is delivered... or something like that, im really tired. I think the vforce made my bike a little rich? I think I went a step leaner on the main jet, and the needle needed to go one step leaner as well, but Im at the end of my needle and dont wanna order a new one lol.
I have a 99 YZ 125. I had to rejet with the V-Force also. I'm 2 steps down on the main (330 vs 350) and probably could go to a 320 when it gets really hot here in TX. Also at the end of the needle and don't feel like ordering a new one. I can't say if the V-Force made it work better than before since the bike was really messed up when I bought it.
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