Backfiring 84
Road Master
Joined: Aug 2006
Posts: 751
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From: 500 miles south from Artic Circle
Road Warrior
Joined: Nov 2006
Posts: 1,441
Likes: 789
From: Heart of Dixie
RE: Backfiring 84
ORIGINAL: sepixlh
Yep brace went to airbox from front cylinder intake tappet mounting bolt....in old scoot, but if I remember correct from -79 ( or someting like that) bracket is mounted to cylinderheads
like THIS
Yep brace went to airbox from front cylinder intake tappet mounting bolt....in old scoot, but if I remember correct from -79 ( or someting like that) bracket is mounted to cylinderheads
like THIS If the gas cap vent is clogged (even partially), you'll get fuel flow until a vacuum is created, such as higher speed running. It may flow enough at lower speeds to not be a problem, and fuel flow may "catch up" when you slow down for a couple of miles after an episode. Try the cap thing next time it happens. If it starts running right in a few seconds, that's the problem. If not, well, at least you checked.
Here's my air cleaner brace - it came with a round air cleaner kit, but I adapted it to my SE air cleaner back plate. It bolts to two tappet bolts and is pretty strong.
[IMG]local://upfiles/21410/9B893F530276442AA2F94FDCB482A4B7.jpg[/IMG]
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Intermediate
Joined: Jul 2007
Posts: 30
Likes: 0
From: New York
RE: Backfiring 84
ORIGINAL: 83XLX
That's a little more elaborate brace than they had. A simple strap from the back of the air cleaner to a tappet bolt is what mine had stock. There's also a couple of bosses on the heads that some air cleaners bolted brackets to.
If the gas cap vent is clogged (even partially), you'll get fuel flow until a vacuum is created, such as higher speed running. It may flow enough at lower speeds to not be a problem, and fuel flow may "catch up" when you slow down for a couple of miles after an episode. Try the cap thing next time it happens. If it starts running right in a few seconds, that's the problem. If not, well, at least you checked.
Here's my air cleaner brace - it came with a round air cleaner kit, but I adapted it to my SE air cleaner back plate. It bolts to two tappet bolts and is pretty strong.
[IMG]local://upfiles/21410/9B893F530276442AA2F94FDCB482A4B7.jpg[/IMG]
ORIGINAL: sepixlh
Yep brace went to airbox from front cylinder intake tappet mounting bolt....in old scoot, but if I remember correct from -79 ( or someting like that) bracket is mounted to cylinderheads like THIS
Yep brace went to airbox from front cylinder intake tappet mounting bolt....in old scoot, but if I remember correct from -79 ( or someting like that) bracket is mounted to cylinderheads
like THIS If the gas cap vent is clogged (even partially), you'll get fuel flow until a vacuum is created, such as higher speed running. It may flow enough at lower speeds to not be a problem, and fuel flow may "catch up" when you slow down for a couple of miles after an episode. Try the cap thing next time it happens. If it starts running right in a few seconds, that's the problem. If not, well, at least you checked.
Here's my air cleaner brace - it came with a round air cleaner kit, but I adapted it to my SE air cleaner back plate. It bolts to two tappet bolts and is pretty strong.
[IMG]local://upfiles/21410/9B893F530276442AA2F94FDCB482A4B7.jpg[/IMG]
the mount for the brace is on the bottom near one of the push rods. Stud sticks up. Aftermarket filter has no where to mount, but i think i can fab up something and self tapper screw it into the bottom of the filter.
Will definately try the gas cap next time she acts up. Which hopefully she won't.
I also added a couple bolts in the holes at the end of the pipes. Was told I might need that little bit of back pressure.
My *** is too whooped to wrench tonight though.
[IMG]local://upfiles/36942/504BABECA7DE45A1839C112A20DB75C3.jpg[/IMG]
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Intermediate
Joined: Jul 2007
Posts: 30
Likes: 0
From: New York
RE: Backfiring 84
little update.. been busy as hell, and haven't even gotten to ride the bike much. But I did manage to fab an air cleaner support bracket out of some flat stock aluminum I found at the hardware store. Only put on about 40 miles since then, but i can report no backfiring problem on that little ride. [sm=icon_cheers.gif]
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