Bogs above idle when I stab the throttle quickly.

[Jayy]

Hello, everyone. I am jetting a new build and wanted to ask everyones opinion. The motor is stock, with an custom made airbox that has two large intake tubes that go to the stock carbs. there is no lid on the box. I am also running pro circuit pipes. My jetting currently is 27.5 pilots, air screws 1.5 turns out, stock needles on middle clip position, and 320 mains. I havent plug chopped yet, but I am pretty sure the mains are close. The bike will rev out clean and fully running WOT in 5th and 6th gear and a fourth gear WOT run did leave a solid smoke ring on a new set of plugs. When idling the bike will idle smoothly and will rev up if I do not jab the throttle too fast. If I jab it too fast the bike will bog as it revs above idle, but wont die and finally revs through it. Anyone know what to adjust for this type of bog? Thanks for the help.

[man27]

Hello, everyone. I am jetting a new build and wanted to ask everyones opinion. The motor is stock, with an custom made airbox that has two large intake tubes that go to the stock carbs. there is no lid on the box. I am also running pro circuit pipes. My jetting currently is 27.5 pilots, air screws 1.5 turns out, stock needles on middle clip position, and 320 mains. I havent plug chopped yet, but I am pretty sure the mains are close. The bike will rev out clean and fully running WOT in 5th and 6th gear and a fourth gear WOT run did leave a solid smoke ring on a new set of plugs. When idling the bike will idle smoothly and will rev up if I do not jab the throttle too fast. If I jab it too fast the bike will bog as it revs above idle, but wont die and finally revs through it. Anyone know what to adjust for this type of bog? Thanks for the help.

I 'd start with turning the air screws another 1/2 turn if thats not it try switching pilots...

I had that same problem I got the v Force3's and it helped alot (my .2 cents) :thumbsup:

[Jayy]

Thanks, man27. That did the trick! I let it warm up then turned the airscrews out another half turn and it got worse, So I turned them in a half turn from where I started and the bog disappeared. Now the pilots are at 1 turn out from seated at it idles fine and I cant seem to make it bog. I am glad that did it, i was afraid it was the needle and I would have to open the carb tops to adjust the clip down a notch. Thanks again.