Just wondering if there would be a huge difference between a 168/312 and a 165/310 primary spring. Another question is that when I hole shot and dont hook up its like it stops shifting and has a slight bog and when I regain traction the clutch starts to shift again and takes right off. its like the secondary shifts to fast and pulls the rpm's down but when I roll on start there is no problem. Its not a big bog but enought to loose the hole shot if I dont hook up good. Any Ideas as to what the problem might be.