Hey everyone, I'm looking to upgrade my 2010 14, I just ordered a Full Voodoo exhaust. Im wanting to go through Schnitz Racing to get a ECU reflash. Im trying to transition in to more raw speed on a straight away HW. Wanted to extend and change sprockets. Will I need a PCV if im doing a reflash on the ecu , And recommended sprocket teeth for more acceleration with about a 6inch stretch. Thanks !!!

You won't need a PC5 with a flash. The gain you could get by refining the flashed fueling will not be noticeable unless the flash was made at a much different altitude than you are at.

I have a 45T rear with 17T front. Stock is 41/17. I do not need an extended swingarm...probably would be a consideration if doing drag race launches. 17/45 is like you dropped one gear....is not going to kill you. Bike feels a bit more aggressive but really, if you just don't use 6th gear, you have pretty much the same effect. If you go any shorter on your gearing than 17/45, you will not be able to hit 186 mph but you will accelerate quicker.

Okay sweet deal , will i need a new chain switching to 45?

Yes, new chain... stretch plus the added sprocket diameter change.

Okay sweet deal , will i need a new chain switching to 45?

If you have enough chain stretch, the old chain might fit a 45 t sprocket. There's no sense in putting a chain almost used up on a new sprockets though. You'll lose a lot of the life of all parts just wearing them in together. Best to change front rear and chain all at the same time unless the part is almost new.

I made my new chain 1 link longer than stock. With a 45 tooth sprocket that put my rear axle back a little farther than where it was with the old stretched out chain. --Advantage this gives me is that I can run a 200/55 tire without touching the swing arm. Not sure if I could with stock chain length.