changed jetting/still have question

6 replies to this topic
  • VT30

Posted April 18, 2006 - 04:39 PM


My bike was running lean on the stock jetting switched to the 170 main and 48 pilot. Now I whe nI 'm going along bogging in 1st gear and give it gas quick it bogs then kicks in and runs awesome.... Where do I go from here?? also came into a corner after getting on it and the bike just died like it got to much fuel???
Thanks for the info!!!

  • One Louder

Posted April 18, 2006 - 06:49 PM


first, welcome to TT

2nd, what bike do you have?

3rd, it sounds like you need a fuel screw adjustment, do you have an aftermarket one (zip-ty, etc...)

4th if you crack the thrott'e open on a thumper it will bog. You need to role the throttle


  • bg10459

Posted April 18, 2006 - 06:51 PM


You should be able to fix that with leak jets and a correctly tuned AP. Look HERE for "Tuning The AP Squirt". There's a wealth of other info there, too, that applies to your bike as well.

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  • SurvivorMan

Posted April 18, 2006 - 06:56 PM


did you just come off of a 2 stroke? you'll get used to the roll on throttle. but first try messing with the fuel screw.

  • SureBlue

Posted April 18, 2006 - 07:50 PM


Raise the needle to 5th clip and adjust the fuel screw. A good starting point is half a turn in from what you have now or 2 turns out from seated position.
You can also raise the idle a bit. I had a small bog too and this cured all of it. I was lazy and only changed jets first and did not raise the needle, but it has to be done too.

  • VT30

Posted April 18, 2006 - 10:26 PM


I have 06 yzf 450. i don't have the zip adjustment.. is the regular screw hard to get at?

  • One Louder

Posted April 18, 2006 - 10:34 PM


it is underneath the carb through a hole on the front of the float bowl. you need a short but skinny screwdriver to adjust it. I would get the extended screw. they are like $20 and most shops stock them

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