another jetting ?
Posted: Mon Jul 29, 2013 8:35 am
ok, well i had replaced the stock pilot (47.5) with a 50.00 and it actually smoked at idle, and not black smoke, so i thought it was ok. I rode around the neighborhood a few times never getting over 50mph and i checked the right plug and it was rich, so I moved the needles to the middle notch where the book says and i took it out on the highway, I was running about 70-80 and checked plugs again and they were lean, so rich at idle and lean at top end. I replaced the pilots because it was really lean down low but now its rich and it was the next size up, so now im thinking i will go back to stock pilots and put one size bigger main in and see what happens, what do you guys think? or maybe i should mess with the airscrews , or fuel screws whatever, the book says 1/4 turn and other books say 3/4 turn , I know to turn them till you get a smooth good idle, but the bike is still lean at top and I had the needles on the second to last notch, i know i have asked this before but I just dont want to go bigger on mains and then its way to rich, maybe just go back to stock jetting? if i keep the new pilots it will be rich at low speeds but when i take it up to speed it will burn the black off and plugs look lean so it could be ok as long as i hit about 70mph now and then , do your gt750's look really lean at low rpms?
Hi,if anything if I putter around in traffic,or ride her slow,then take out a plug,it's more rich than lean,my needle clip on number 4,runs as sweet as a nut...never fouls plugs,starts right up on the choke,even after sitting for a month.. 