Posted by The Older Gentleman on June 9, 2009, 5:40 pm
> What might cause this?
Incorrect mixture. Incorrect timing (I am not sure if the 1980 model XS
had points or electronic ignition, and I cba to check right now).
--
BMW K1100LT Ducati 750SS Honda CB400F & XBR500 Triumph Street Triple
Suzuki TS250ER
If you don't know what you're doing, don't do it. And RTFM.
chateau dot murray at idnet dot com
Posted by Dave on June 10, 2009, 12:38 pm
>> What might cause this?
> Incorrect mixture. Incorrect timing (I am not sure if the 1980 model XS
> had points or electronic ignition, and I cba to check right now).
The XS650G (1980) has electronic ignition, timing cannot be adjusted.
As for incorrect mixture, I'll try re-setting the air mixture screw on the
problem side for best idle although last time I used the "dead cylinder"
method I had quite a time just keeping the bike from stalling. I added some
carb cleaner and went for a spin last night, the bike runs just fine at
higher than idle rpm's.
Thanks.
Dave
Posted by =?ISO-8859-1?Q?=BF?= on June 10, 2009, 12:54 pm
> > Incorrect mixture. Incorrect timing (I am not sure if the 1980 model XS
> > had points or electronic ignition, and I cba to check right now).
> The XS650G (1980) has electronic ignition, timing cannot be adjusted.
Yes, and it only has *one* timing sensor and a 360 degree crankshaft,
so
both coils have to fire at the same time. One of the sparks is wasted
because the exhaust valve on that cylinder is open.
If there is a buildup of unburned mixture in the exhaust pipe on that
side, you'll hear a bang! out of that cylinder when the plug fires.
I advise you not to waste a lot of time debating with "The Turd That
Won't Flush". He loves to debate and argue instead of helping riders
find solutions to their problems.
Before you know it, he'll have you apologizing to him and thanking him
for giving you a ration of shit.
> As for incorrect mixture, I'll try re-setting the air mixture screw on the
> problem side for best idle although last time I used the "dead cylinder"
> method I had quite a time just keeping the bike from stalling. �I added some
> carb cleaner and went for a spin last night, the bike runs just fine at
> higher than idle rpm's.
OK, just remember that you can adjust the idle mixture screw all day
and it won't change a thing if the idle jets and air jets and passages
are plugged up with gum and varnish from evaporated gasoline.
Posted by Dave on June 10, 2009, 1:40 pm
>OK, just remember that you can adjust the idle mixture screw all day
>and it won't change a thing if the idle jets and air jets and passages
>are plugged up with gum and varnish from evaporated gasoline.
Yeah, I'm just hoping. I don't really want to pull & clean the carbs if I
don't have to.
Posted by The Older Gentleman on June 10, 2009, 1:47 pm
> >
> >OK, just remember that you can adjust the idle mixture screw all day
> >and it won't change a thing if the idle jets and air jets and passages
> >are plugged up with gum and varnish from evaporated gasoline.
>
> Yeah, I'm just hoping. I don't really want to pull & clean the carbs if I
> don't have to.
If they're really gummed, then all the magic snake oil in the world
won't help. Ultrasound cleaning works wonders. I used it on a carb for
an old Honda 125 single last year: brilliant.
Generally, carbs only get bunged up if they've been left for a long,
long time (like well over a year). In a hot climate, obviously, the fuel
inside them will evaporate and gum them up in less time than that.
If the bike hasn't been standing for ages, then it's not going to be
gummed carbs anyway, but just bad adjustment.
--
BMW K1100LT Ducati 750SS Honda CB400F & XBR500 Triumph Street Triple
Suzuki TS250ER
If you don't know what you're doing, don't do it. And RTFM.
chateau dot murray at idnet dot com
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