Bone stock 2009 yfz450r need fuel controller? *Please help*
I've had the same issue with my quad since i bought it 6 months ago from the original owner and still cannot figure out why it might still do this..low rpm hesitation/bog/loss of power feel then would pick back up rapidly. Idles perfect, revs fine..just dont get it. Replaced almost everything fuel related, tested tps for dead spots and much more..have not pulled the head or tore it apart as i dont think its the issue besides checking the valves. I have invested ALOT of time and money into it and just wondering if buying a PC5 or MSD will solve it even though its bone stock at the moment?
Original owner said it worked fine before storing it for months/hardly ridden also, not sure what was true.