Backfiring when shifting with 1/4 throttle
#1
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Hey everyone I just rejetted my bike (mods in signature) and it's now popping when shifting and down shifting (pulling clutch in) with only about 1/4 throttle. It doesn't seem to pop anywhere after 1/2 throttle, even after WOT. It also doesn't seem to pop when letting off the gas quickly, only when clutching it to shift.
What will I need to adjust to remedy this popping? I've heard 1/4 out on the fuel screw. What do you guys think?
BTW I'm on Maui, Hawaii so pretty much sea level. (jetting in signature)
Thanks all.
What will I need to adjust to remedy this popping? I've heard 1/4 out on the fuel screw. What do you guys think?
BTW I'm on Maui, Hawaii so pretty much sea level. (jetting in signature)
Thanks all.
#4
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turn in a bit...but, i wouldn't go a full 1/4 turn in...i noticed it's very sensitive with the dj128 or dj132...just turn mm at a time, ride, turn in, ride, etc...do smaller turns in...
#6
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@toyotabuilder I fully close the throttle when shifting, I'm talking about having it at 1/4 throttle before and after shifting.
@darkmarc I thought popping is a sign of a lean air/fuel mixture not rich? Also, doesn't the needle only affect 1/4 to about 3/4 throttle? It's popping only when the throttle is fully closed.
@ahnh666 I would love to that but I have the stock fuel screw unfortunately so It's most likely going to be a PITA to adjust it that many times.
@brieninsac Thanks, hopefully I get it dialed in. BTW I copied your signature layout![Big Grin](https://www.kawasakiforums.com/forum/images/smilies/biggrin.gif)
Do you have to rip the carb out to adjust the fuel screw? What methods have you guys used when using the stock screw?
Thanks guys
@darkmarc I thought popping is a sign of a lean air/fuel mixture not rich? Also, doesn't the needle only affect 1/4 to about 3/4 throttle? It's popping only when the throttle is fully closed.
@ahnh666 I would love to that but I have the stock fuel screw unfortunately so It's most likely going to be a PITA to adjust it that many times.
@brieninsac Thanks, hopefully I get it dialed in. BTW I copied your signature layout
![Big Grin](https://www.kawasakiforums.com/forum/images/smilies/biggrin.gif)
Do you have to rip the carb out to adjust the fuel screw? What methods have you guys used when using the stock screw?
Thanks guys
Last edited by MauiBoy808; 09-11-2012 at 03:42 AM.
#8
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+1...![Big Grin](https://www.kawasakiforums.com/forum/images/smilies/biggrin.gif)
![Big Grin](https://www.kawasakiforums.com/forum/images/smilies/biggrin.gif)
#9
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Ok I'll try this method but isn't popping a sign of a lean condition not rich?