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backfire causes and cures?
Posted: Mon Apr 22, 2002 11:36 am
by mmytacist
On closing throttle I ofter hear pops from the stock exhaust (more
like farts). These aren't super loud like backfires, but it's
obviously fuel being ignited in the exhaust. They occur randomly on
closing throttle without regard to how hot the engine is, or how many
rpm's I was running before closing the throttle.
Are there common reasons for these noises that I could check? I have
a completely stock engine/exhaust setup, with no carb mods (no
mixture screw changes, no new jetting, etc). The only change on my CA
model bike is the removal of the carbon cannister and associated
plumbing.
Thanks,
Ben
backfire causes and cures?
Posted: Mon Apr 22, 2002 12:22 pm
by bradklr650
This is symptomatic of the lean stock carb settings on the low speed
circuits, back the pilot screw out to 2 turns and it goes away, along
with improved off idle throttle response.
Brad A15
--- In DSN_klr650@y..., "mmytacist" wrote:
> On closing throttle I ofter hear pops from the stock exhaust (more
> like farts). These aren't super loud like backfires, but it's
> obviously fuel being ignited in the exhaust. They occur randomly
on
> closing throttle without regard to how hot the engine is, or how
many
> rpm's I was running before closing the throttle.
>
> Are there common reasons for these noises that I could check? I
have
> a completely stock engine/exhaust setup, with no carb mods (no
> mixture screw changes, no new jetting, etc). The only change on my
CA
> model bike is the removal of the carbon cannister and associated
> plumbing.
>
> Thanks,
> Ben
backfire causes and cures?
Posted: Mon Apr 22, 2002 12:51 pm
by millerized_2000
Here's how I fixed mine. I was hauling ass down a hill, accidentally
turned off the bike with the kill switch. When I realized a few
seconds later, I turned it back on and had what sounded like a
shotgun blast come out the back. Not a peep since, no tweety, no
farting. Would I recommend it to anyone else? Without liability, it
worked for me. Of course I also shot a glasspack about 50 yards when
I was a kid doing the same thing in my mercury capri. Blew one hell
of a hole in the headers too. Just worked for the bike, and I
see/feel nothing different other than it not farting. Good luck, and
DON'T say I told you to do it.
millerized
--- In DSN_klr650@y..., "mmytacist" wrote:
> On closing throttle I ofter hear pops from the stock exhaust (more
> like farts). These aren't super loud like backfires, but it's
> obviously fuel being ignited in the exhaust. They occur randomly
on
> closing throttle without regard to how hot the engine is, or how
many
> rpm's I was running before closing the throttle.
>
> Are there common reasons for these noises that I could check? I
have
> a completely stock engine/exhaust setup, with no carb mods (no
> mixture screw changes, no new jetting, etc). The only change on my
CA
> model bike is the removal of the carbon cannister and associated
> plumbing.
>
> Thanks,
> Ben
backfire causes and cures?
Posted: Mon Apr 22, 2002 1:15 pm
by RM
On Mon, 22 Apr 2002, millerized_2000 wrote:
>turned off the bike with the kill switch. When I realized a few seconds
>later, I turned it back on and had what sounded like a shotgun blast
>come out the back. Not a peep since, no tweety, no farting. Would I
>recommend it to anyone else? Without liability, it worked for me. Of
>course I also shot a glasspack about 50 yards when I was a kid doing the
>same thing in my mercury capri. Blew one hell of a hole in the headers
>too.
I once broke a piston in a Chevy small-block from doing this a little bit
too much.
klr or tenagi ?
Posted: Mon Apr 22, 2002 7:46 pm
by jhobrut
I am about to buy a 1990 Tengai, 8k miles, for what I consider top
dollar, $2500. Can anyone convince as to why I should buy a 96 or
newer KLR650? I like the lower fender on the Tengai as well as the
rarity, but I realize I will go off road less, due to the extra body
work. I also think it may be harder to resale when the time comes. I
do like the blue KLR's, but there pretty hard to find nearby. I think
I could probably get a nice KLR with some extras for the same $ or
pretty close. Will the Tengai be hard to sell?
I have enjoyed this site as it has given me gobs of info related to
KLR's. Appreciate any input!!
Jeff