440ex jetting of stock carb HELP
#12
10-22-2004 | 09:22 AM
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#13
10-22-2004 | 10:30 AM
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Trailblazer
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440ex jetting of stock carb HELP
Ok ,so what your saying is that the outside temp messes with the jetting ?It can get pretty cold here in Wa State .Are you running a stock carb ?If so, and realizing it is a pain to dial it in ,the quad will still kick some butt ??? Im trying to avoid having to spend the big $$$$ on a edelbrock ,or FCR ,but I suppose if I had to I could take a second mortgage out on my house and get one . On the air/pilot screw ,do I just leave that at the stock setting ?I believe it is 1 1/2 turns out ??Or do I have to mess with that thing too ?[img]i/expressions/face-icon-small-disgusted.gif[/img]
Thanks for the info ,
440LW
Thanks for the info ,
440LW
#14
10-22-2004 | 10:48 AM
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440ex jetting of stock carb HELP
Oh yeah the temperature has an effect on jetting, more on some than others. I have a tock carb and it wasn't to bad to figure out bu tonce you got it close, it only needs minor tweeking here and there. The stock carb will be fine, you will just get a lot more power out of a bigger one. Your air screw is just for adjustments on idle and a little bit of throttle, just adjust that accordingly.
#15
10-22-2004 | 11:10 AM
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#16
10-22-2004 | 11:14 AM
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440ex jetting of stock carb HELP
I can't remeber exactly,
but if a 140 is stock pilot, that is what I use in the summer, and 142 in the winter. I think my main jet is 162.
I don' t dune ride but I do climb some wickes hills, sometimes completely vertical at some points, and it does great and doesn't bog as long as you know how to ride.
but if a 140 is stock pilot, that is what I use in the summer, and 142 in the winter. I think my main jet is 162.
I don' t dune ride but I do climb some wickes hills, sometimes completely vertical at some points, and it does great and doesn't bog as long as you know how to ride.
#18
10-22-2004 | 11:25 AM
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440ex jetting of stock carb HELP
Ok ,thanks again !! I really appreciate it .Ill just have to do some tweaking and see what works best .Unfortunatly ,I tore my ACL in my knee ,(from duning) and now Im stuck with the recovery process .No riding for 6 months !!![img]i/expressions/face-icon-small-mad.gif[/img] But I can go out in the ole garage and mess with jets ,and maybe rip up and down the driveway to see what works best .Just dont tell my Doc that .HA !! Thanks again for the info .
440LW
440LW
#19
10-26-2004 | 06:03 PM
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440ex jetting of stock carb HELP
Originally posted by: 440LW
Ok ,thanks again !! I really appreciate it .Ill just have to do some tweaking and see what works best .Unfortunatly ,I tore my ACL in my knee ,(from duning) and now Im stuck with the recovery process .No riding for 6 months !!![img]i/expressions/face-icon-small-mad.gif[/img] But I can go out in the ole garage and mess with jets ,and maybe rip up and down the driveway to see what works best .Just dont tell my Doc that .HA !! Thanks again for the info .
440LW
Ok ,thanks again !! I really appreciate it .Ill just have to do some tweaking and see what works best .Unfortunatly ,I tore my ACL in my knee ,(from duning) and now Im stuck with the recovery process .No riding for 6 months !!![img]i/expressions/face-icon-small-mad.gif[/img] But I can go out in the ole garage and mess with jets ,and maybe rip up and down the driveway to see what works best .Just dont tell my Doc that .HA !! Thanks again for the info .
440LW
i wouldn't go over a keihin 165 mainjet. you need to lower the stock needle clip to the 4th position and also put in a 42 or 45 pilot jet. also, your fuel screw needs to be turned out more. this is why it is backfiring when you let off the gas.
