Problem: Intermittent Missing at high speed/high rpm. Started 100 miles
from Moab continued till today. Most typically the engine misses on a series
of long uphill grades at interstate speeds, very irritating. Never misses
around town or on the trail. So far I addressed the problem by: Opening the
gas cap at speed while engine was missing; didn't help. Cleaned air filter.
Took off float bowl then blew out fuel line entrance. Installed new vacuum
line from carb to petcock. Checked coil for resistance then had it checked
for spark; all read fine. Spark plug has less than 2k.
Today I took the bike for a ride engine commenced to missing. Though the
tank was full I decided to try something, I switched to reserve; the engine
stopped missing immediately and ran great until.....I moved the lever back
down to regular open position; in a mile or two it started missing. When I
moved back to reserve it again ran fine. Repeated experiment with same
results. As a final test I stayed at the reserve position and ran the bike
at 80-90mph for 40 miles on a stretch of I 25 that climbs about 1200' from
Pueblo to Colorado Springs. Exactly the situation where the problem would
usually manifest itself. The engine didn't miss a beat.
.......I've installed Skip F's petcock mod but since the problem started
before the mod was added, it doesn't look like it's a factor. I don't have
much experience with petcocks. (I do have a dog.) Has anyone heard of
something like this? Is the main line dirty? Can't see how; it's always had
a filter on it. Is it one of the O rings or a gasket? Do I need a rebuild
kit? Any comments/advice appreciated. Bogdan
[dsn_klr650] petcock pickle
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- Posts: 28
- Joined: Thu Apr 06, 2000 12:19 pm
[dsn_klr650] petcock pickle
My greencycle has been doing this exact thing for about 8 months. I checked
all the electrical lines (kick stand and clutch safety kills) and found no
problems. I had the dealer look at it and even had the head mechanic cruise
on my bike home/lunch breaks/where ever for three days. He stated he found
no hesitations or stalling. So I picked it up and on the home low and
behold it did it again.
This problem really bums me out because the Harley I had seemed to be more
faithful. There was a lister that said to ride it for a mile or so and open
the gas tank to check if the diaphragm is cracked or not. It does have a
lot of vacuum when I do that and when I first get on after it being parked
for 18+ hours or so. Tried the reserve thing which has proven to do good
sometimes. The other thing I tried that worked at times is very unsafe but
as I approach a year and have this same problem I put safety aside (not
good). Anyways, what it is, is I push down on the kick stand while the bike
is burping and farting, it stalls as it is lowered, I release it and kick it
up and it runs great for a short while.
It does seem to stall at the same locations, usually. So, I do not have any
advice but I do empathize with you. I do look forward to the day I can ride
this bike and not have to constantly think and plan a place to pull over.
Aloha,
kahiau e14
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