18-08-13, 05:40 PM
This may or may not help, but I went trough 2 sets of carbs and ended up paying a fortune to some bollox to dyno jet one set and get it running properly on a dyno, he didn't, just got new carbs, still ran like shit cause of the after market exhaust because carbs came of standard bike, I just removed air filter altogether and it runs great, I know it's not for every one but I removed carbs and cleaned and put back in and adjusted this and that and lifted and dropped needles,
Best advise, mix screws as far as I could see only adjust the idle and up to 3k after that they don't count at all, it's the needles next, dropping the circlip down will increase trottle response and for me it cleared the bogging down, found 1 of the diaphrams was cracked , best way to find out is run an air line through the vent holes and if they all lift evenly then there fine.
Float heights can be done with carbs off, hold carbs at an angle so that the needle at the back is bearly touching and measure 14mm from base to top of float( I can be corrected on that!
Found it easy to do this with a barcode I ripped of a cardboard box,
Try find any leaks either side of carbs, if none then try it and see how it goes but float height isn't always the prob,
If you know anyone close that could lend a set of carbs it's a quick way to find out if your carbs are ready for the bin.
Not word of god but just how I got though it
Best advise, mix screws as far as I could see only adjust the idle and up to 3k after that they don't count at all, it's the needles next, dropping the circlip down will increase trottle response and for me it cleared the bogging down, found 1 of the diaphrams was cracked , best way to find out is run an air line through the vent holes and if they all lift evenly then there fine.
Float heights can be done with carbs off, hold carbs at an angle so that the needle at the back is bearly touching and measure 14mm from base to top of float( I can be corrected on that!
Found it easy to do this with a barcode I ripped of a cardboard box,
Try find any leaks either side of carbs, if none then try it and see how it goes but float height isn't always the prob,
If you know anyone close that could lend a set of carbs it's a quick way to find out if your carbs are ready for the bin.
Not word of god but just how I got though it