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Post by ej132 on Jun 17, 2013 10:34:52 GMT -5
Still working on getting my bbk, perf. head and a9 all working right. Finally picked up my #92 main jet. But still getting a lot of backfiring, haven't installed the 92 yet. But checked the air filter and noticed a lot of gas in it. Is this an issue or is it just from the float sticking? I think mine sticks a lot cause of living down a bumpy road
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Post by alleyoop on Jun 17, 2013 11:05:10 GMT -5
Backfiring is not good, check for AIR LEAKS by the Flange where the pipe connects to the motor the intake manifold for cracks or leaking around the head, clamps not tight holding carb also air tubing and air box.
If all that is good no leaks then check your timing line up the cam sprocket with the two holes even with the head THEN check the Case Pointer and see where it is pointing to on the FLYWHEEL. 1 link off on the cam is about 10% of timing.
Alleyoop
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Post by ej132 on Jun 17, 2013 12:08:04 GMT -5
Ok thank you, I will start there.
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Post by ej132 on Jun 17, 2013 14:41:29 GMT -5
Ok so I got my #92 jet installed and now as soon as I hit the gas it bogs out, once it gets through it it goes good but then at full throttle or a bit less I get this little pulsation. Is this too big of a jet?
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Post by Deleted on Jun 17, 2013 17:14:54 GMT -5
Run WOT. When bogs let off throtle about 1/4. If it recovers and runs normal its rich. If it lurches ahead its lean.
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Post by ej132 on Jun 18, 2013 22:45:23 GMT -5
Ok so been monkeying around with it today. First took entire air filter cover off and seemed to help a lot. Then reinstalled cover but removed little snorkel thing and still seems good. Now I'm just bogging out when I accelerate, but just for a couple seconds. Or if I am full throttle the go to half throttle then try to accelerate it bogs for a couple seconds. But I'm still getting a lot of back firing. Would adjusting the needle help? That's under the plastic cover on top of the carb right?
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Post by buford1488 on Jun 19, 2013 9:52:17 GMT -5
 main jet.......... |
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Post by ej132 on Jun 19, 2013 13:42:28 GMT -5
You think I need an even bigger jet? Even with the back firing? The timing is spot on so I thought backfiring would be from too much gas?
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Post by millsc on Jun 19, 2013 14:24:27 GMT -5
Get rid of the airbox
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Post by ej132 on Jun 19, 2013 15:15:54 GMT -5
Get rid of the air box for the bogging problem or the backfire? To test would pulling the plastic cover over the filter be good? Just to see if more air helps?
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Post by ej132 on Jun 19, 2013 15:38:41 GMT -5
Ok so taking the air box cover off helped the bogging when moving then accelerating. But I'm still getting a bog on acceleration from a stop. So should I drill out the main jet up to a ? Any ideas on the back fire? |
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Post by millsc on Jun 19, 2013 16:48:06 GMT -5
put an open air filter on it trust me, ive done tons of 50mm kits none run right with airbox, no mods to the airbox will help, take it off. Its not your jet its the airbox.
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Post by millsc on Jun 19, 2013 16:50:05 GMT -5
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Post by ej132 on Jun 19, 2013 18:36:57 GMT -5
Do you believe that the air filter will stop the backfiring?
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Post by ej132 on Jun 19, 2013 19:16:04 GMT -5
Also if I did that air filter you posted could I use my stock exhaust still?
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..BAD TO THE BONE..
main jet..........