Carb backfiring?
#1
Carb backfiring?
So I got the bike jetted and set up and it runs awesome, throttle response is spot-on, it pulls HARD at all rpms....but I noticed the cold idle was only around 750 rpms and the bike kept cutting out even after a few minutes of choking it...and warm idle was about 850, well below spec.
Well, I upped the idle via the little thumbscrew, to about 1100...and now when I'm, say, pulling into a parking lot and I pull the clutch in and give it a blip of the throttle, it keeps backfiring through the carburetors??
Did cranking this screw somehow make the carbs lose their sync maybe? Any ideas?
Well, I upped the idle via the little thumbscrew, to about 1100...and now when I'm, say, pulling into a parking lot and I pull the clutch in and give it a blip of the throttle, it keeps backfiring through the carburetors??
Did cranking this screw somehow make the carbs lose their sync maybe? Any ideas?
#2
I think the carbs are loading up at low rpm's and when you goose it, too much gas goes into the chamber and causes it to burp. You might double check your choke cable and make sure everything is clear. If the cable is caught on something it might not be completely clearing when you think it's full open.
#3
I know that he disassembled and cleaned the carbs and since all of that, the choke works quite a bit differently....it's much, much looser on the pull, but it also takes a further pull to work effectively....I'll bet the cable has slack and is binding up, because it doesn't seem to start even choking at all until the cable is 1/3 of an inch out....
Thanks, I'll check it out tomorrow!
Thanks, I'll check it out tomorrow!
#6
Slip the little rubber cover off of the back side of the choke, not the cable itself, but where it's mounted.... You'll see a little nut there, just tighten it up some until the cable stays in place, and slip the cover back over it. Greg's got a write-up on it, it's a common point of confusion
#8
"Cleaned carbs, synchronized carbs. Adjusted mixture screws. Installed factory jet kit, 178 mj front, 180 mj rear, 50 pilot jets, needles in 3 position"
It only started this the other night, after I upped the idle just a hair because it was stalling at idle. It still runs awesome and has great throttle response, even down at 2000 rpms it will make the front end climb up....but it won't take a blip
#10
So how should I go about correcting this? As I mentioned, the bike runs AWESOME...it just backfires now and then...did it once tonight in a 45 min ride..almost afraid to fix "good"
#12
And you dont know the dealership here! Scumbags.
#14
It was a used Factory kit.. What's the tool look like>? I'll see if it's in what he gave me leftover
#16
I bought the kit used...it had everything else in it but the previous owner must've taken the tool.
#18
Thread
Thread Starter
Forum
Replies
Last Post
iamanonymous
Technical Discussion
20
03-07-2007 03:13 PM
EngineNoO9
Technical Discussion
14
08-11-2006 02:27 PM