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'87 CBR600: Lo-speed miss
Re: '87 CBR600: Lo-speed miss
On May 9, 7:18=EF=BF=BDpm, "Who Me?" <hitchhi...@dont.panic> wrote:
> Being an '87, I don't know if it even HAS an electronic ignition.
If a motorcycle doesn't have mechanical ignition points, it has an
electronic ignition system.
On May 9, 7:18=EF=BF=BDpm, "Who Me?" <hitchhi...@dont.panic> wrote:
> Being an '87, I don't know if it even HAS an electronic ignition.
If a motorcycle doesn't have mechanical ignition points, it has an
electronic ignition system.
Re: '87 CBR600: Lo-speed miss
Who Me? <hitchhiker@dont.panic> wrote:
> Being an '87, I don't know if it even HAS an electronic ignition.
It does. Trust me.
--
BMW K1100LT Ducati 750SS Honda CB400F & SL125
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60
The bells, the bells.....
Who Me? <hitchhiker@dont.panic> wrote:
> Being an '87, I don't know if it even HAS an electronic ignition.
It does. Trust me.
--
BMW K1100LT Ducati 750SS Honda CB400F & SL125
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60
The bells, the bells.....
Re: '87 CBR600: Lo-speed miss
On Sat, 10 May 2008 13:20:10 +0100, totallydeadmailbox@yahoo.co.uk (The Older Gentleman)
wrote:
>Who Me? <hitchhiker@dont.panic> wrote:
>
>> Being an '87, I don't know if it even HAS an electronic ignition.
>
>It does. Trust me.
Is true!
To my knowledge, all the CBR's have electronic ignition.
This one does fo' sho': I had to troubleshoot it years ago.
P
" ... and the bees made honey in the lion's head."
- from "If I Had My Way", Blind Willie Johnson
On Sat, 10 May 2008 13:20:10 +0100, totallydeadmailbox@yahoo.co.uk (The Older Gentleman)
wrote:
>Who Me? <hitchhiker@dont.panic> wrote:
>
>> Being an '87, I don't know if it even HAS an electronic ignition.
>
>It does. Trust me.
Is true!
To my knowledge, all the CBR's have electronic ignition.
This one does fo' sho': I had to troubleshoot it years ago.
P
" ... and the bees made honey in the lion's head."
- from "If I Had My Way", Blind Willie Johnson
Re: '87 CBR600: Lo-speed miss
On May 8, 2:27=EF=BF=BDpm, Puddin' Man <puddingDOT...@gmail,com > wrote:
> For the last 5 years or so, it's had a lo-speed miss. Chokes and burbles
> from about 1200-1500 rpm or so. Like its firing on 2 or 3 cyls. Very
> annoying in traffic.
It can't be very annoying if you've been putting up with it for five
years.
On May 8, 2:27=EF=BF=BDpm, Puddin' Man <puddingDOT...@gmail,com > wrote:
> For the last 5 years or so, it's had a lo-speed miss. Chokes and burbles
> from about 1200-1500 rpm or so. Like its firing on 2 or 3 cyls. Very
> annoying in traffic.
It can't be very annoying if you've been putting up with it for five
years.
Re: '87 CBR600: Lo-speed miss
Puddin' Man wrote:
> '87 CBR600, 20k easy mi.
>
> <snip>
>
> For the last 5 years or so, it's had a lo-speed miss. Chokes and burbles
> from about 1200-1500 rpm or so. Like its firing on 2 or 3 cyls. Very
> annoying in traffic.
>
> I pulled the Keihin CV carbs and cleaned them meticulously May '06.
If nothing was done mechanically to cause this then I'd have to say
it's possible something inside the carb has worn out to create a rich
condition. Got any spark plugs showing a lot of carbon?
>
> The easy answer is crud in lower end of carbs. Doesn't seem to fit the facts.
I had the same thing happen when my Charcoal Cannister screen broke and
filled the float bowls with charcoal. If your float bowls are completely
clean then I'd go with the above.
>
> There is a section in my Garbage-Clymer manual on "Pilot Screw Adjustment".
> I haven't tried any of it.
If you're looking for the adjusters, look on the right/exhaust side of
the carbs in the lower front corner of the carb. If the non tamper caps
are still on you will see a small grey screw head that will have limited
movement (1/4 turn max each direction). I pried the caps off to find a
smaller brass screw head underneath which was not limited in movement.
>
> There's no evidence that the motor is running either lean or rich.
Check out Factorypro,com / Product Tech Support / CV Carb Tuning
section for some tips on troubleshooting lean/rich conditions.
I took my carbs apart for cleaning and played around with the throttle
needle height, pilot screw setting, and main jet quite a bit. Why? I
bought the bike with stock jetting and a Yoshimura full race only
exhaust already installed. Ran super lean I had a few flat spots I had
to dial out. I can go into more details on what I found/fixed, if you
need the info.
One indicator I used when I was tuning: If I revved the bike, and it
'hung' before dropping down to idle, then it was too lean. If it dropped
down to idle like a brick, it was too rich. Then I'd adjust the pilot
screw and needle accordingly.
I've got two ideas. 1) Something has worn inside the carb allowing too
much fuel to bog down the bike at those rpms. A float valve/leaking
jet/or even worn throttle needle 2) A few years ago my
Regulator/Rectifier melted and failed. I replaced it with a salvage yard
(yet good) R/R and a fresh battery. The bike never fired up/idled and
accelerated so smooth. After a few months, the stumble I had came back
to normal, and just last year my second R/R burned up.
As a side note, in the 15 years I've had it, I've had 6 batteries die.
I have an electrical issue I haven't really troubleshot yet (stator).
It's been a great bike otherwise.
-88 CBR600F 72k
-07 Victory 8 Ball 4k
>
> Any ideas?
>
> Thanx,
> Puddin'
>
> " ... and the bees made honey in the lion's head."
> - from "If I Had My Way", Blind Willie Johnson
Puddin' Man wrote:
> '87 CBR600, 20k easy mi.
>
> <snip>
>
> For the last 5 years or so, it's had a lo-speed miss. Chokes and burbles
> from about 1200-1500 rpm or so. Like its firing on 2 or 3 cyls. Very
> annoying in traffic.
>
> I pulled the Keihin CV carbs and cleaned them meticulously May '06.
If nothing was done mechanically to cause this then I'd have to say
it's possible something inside the carb has worn out to create a rich
condition. Got any spark plugs showing a lot of carbon?
>
> The easy answer is crud in lower end of carbs. Doesn't seem to fit the facts.
I had the same thing happen when my Charcoal Cannister screen broke and
filled the float bowls with charcoal. If your float bowls are completely
clean then I'd go with the above.
>
> There is a section in my Garbage-Clymer manual on "Pilot Screw Adjustment".
> I haven't tried any of it.
If you're looking for the adjusters, look on the right/exhaust side of
the carbs in the lower front corner of the carb. If the non tamper caps
are still on you will see a small grey screw head that will have limited
movement (1/4 turn max each direction). I pried the caps off to find a
smaller brass screw head underneath which was not limited in movement.
>
> There's no evidence that the motor is running either lean or rich.
Check out Factorypro,com / Product Tech Support / CV Carb Tuning
section for some tips on troubleshooting lean/rich conditions.
I took my carbs apart for cleaning and played around with the throttle
needle height, pilot screw setting, and main jet quite a bit. Why? I
bought the bike with stock jetting and a Yoshimura full race only
exhaust already installed. Ran super lean I had a few flat spots I had
to dial out. I can go into more details on what I found/fixed, if you
need the info.
One indicator I used when I was tuning: If I revved the bike, and it
'hung' before dropping down to idle, then it was too lean. If it dropped
down to idle like a brick, it was too rich. Then I'd adjust the pilot
screw and needle accordingly.
I've got two ideas. 1) Something has worn inside the carb allowing too
much fuel to bog down the bike at those rpms. A float valve/leaking
jet/or even worn throttle needle 2) A few years ago my
Regulator/Rectifier melted and failed. I replaced it with a salvage yard
(yet good) R/R and a fresh battery. The bike never fired up/idled and
accelerated so smooth. After a few months, the stumble I had came back
to normal, and just last year my second R/R burned up.
As a side note, in the 15 years I've had it, I've had 6 batteries die.
I have an electrical issue I haven't really troubleshot yet (stator).
It's been a great bike otherwise.
-88 CBR600F 72k
-07 Victory 8 Ball 4k
>
> Any ideas?
>
> Thanx,
> Puddin'
>
> " ... and the bees made honey in the lion's head."
> - from "If I Had My Way", Blind Willie Johnson
Re: '87 CBR600: Lo-speed miss
On Thu, 22 May 2008 21:31:46 -0700, red_bowfire <red_bowfire@SPAMsbcglobal,net > wrote:
>Puddin' Man wrote:
>> '87 CBR600, 20k easy mi.
>>
>> <snip>
>>
>> For the last 5 years or so, it's had a lo-speed miss. Chokes and burbles
>> from about 1200-1500 rpm or so. Like its firing on 2 or 3 cyls. Very
>> annoying in traffic.
>>
>> I pulled the Keihin CV carbs and cleaned them meticulously May '06.
>
> If nothing was done mechanically to cause this then I'd have to say
>it's possible something inside the carb has worn out to create a rich
>condition. Got any spark plugs showing a lot of carbon?
Nope. Pulled #1 and 2 plugs not long ago. Looked normal.
>>
>> The easy answer is crud in lower end of carbs. Doesn't seem to fit the facts.
>
>I had the same thing happen when my Charcoal Cannister screen broke and
>filled the float bowls with charcoal. If your float bowls are completely
>clean then I'd go with the above.
The bowls were *extremely* clean when I pulled carbs last season. Bike
has had very little use since.
>>
>> There is a section in my Garbage-Clymer manual on "Pilot Screw Adjustment".
>> I haven't tried any of it.
>
>If you're looking for the adjusters, look on the right/exhaust side of
>the carbs in the lower front corner of the carb. If the non tamper caps
>are still on you will see a small grey screw head that will have limited
>movement (1/4 turn max each direction). I pried the caps off to find a
>smaller brass screw head underneath which was not limited in movement.
>
>>
>> There's no evidence that the motor is running either lean or rich.
>
> Check out Factorypro,com / Product Tech Support / CV Carb Tuning
>section for some tips on troubleshooting lean/rich conditions.
> I took my carbs apart for cleaning and played around with the throttle
>needle height, pilot screw setting, and main jet quite a bit. Why? I
>bought the bike with stock jetting and a Yoshimura full race only
>exhaust already installed. Ran super lean I had a few flat spots I had
>to dial out. I can go into more details on what I found/fixed, if you
>need the info.
My bike is 100% stock and I got no evidence (via plugs) of a mixture
problem.
> One indicator I used when I was tuning: If I revved the bike, and it
>'hung' before dropping down to idle, then it was too lean. If it dropped
>down to idle like a brick, it was too rich. Then I'd adjust the pilot
>screw and needle accordingly.
I've not noticed either condition.
> I've got two ideas. 1) Something has worn inside the carb allowing too
>much fuel to bog down the bike at those rpms. A float valve/leaking
>jet/or even worn throttle needle 2) A few years ago my
>Regulator/Rectifier melted and failed. I replaced it with a salvage yard
>(yet good) R/R and a fresh battery. The bike never fired up/idled and
>accelerated so smooth. After a few months, the stumble I had came back
>to normal, and just last year my second R/R burned up.
Hmmmmm. Interesting.
> As a side note, in the 15 years I've had it, I've had 6 batteries die.
>I have an electrical issue I haven't really troubleshot yet (stator).
>It's been a great bike otherwise.
Problem symptoms?
Back in the 90's it took po' me 2+ years to diagnose/fix an intermittent
elec. problem (failed to start at unpredictable times). It was the
pulse generator.
Thx,
P
" ... and the bees made honey in the lion's head."
- from "If I Had My Way", Blind Willie Johnson
On Thu, 22 May 2008 21:31:46 -0700, red_bowfire <red_bowfire@SPAMsbcglobal,net > wrote:
>Puddin' Man wrote:
>> '87 CBR600, 20k easy mi.
>>
>> <snip>
>>
>> For the last 5 years or so, it's had a lo-speed miss. Chokes and burbles
>> from about 1200-1500 rpm or so. Like its firing on 2 or 3 cyls. Very
>> annoying in traffic.
>>
>> I pulled the Keihin CV carbs and cleaned them meticulously May '06.
>
> If nothing was done mechanically to cause this then I'd have to say
>it's possible something inside the carb has worn out to create a rich
>condition. Got any spark plugs showing a lot of carbon?
Nope. Pulled #1 and 2 plugs not long ago. Looked normal.
>>
>> The easy answer is crud in lower end of carbs. Doesn't seem to fit the facts.
>
>I had the same thing happen when my Charcoal Cannister screen broke and
>filled the float bowls with charcoal. If your float bowls are completely
>clean then I'd go with the above.
The bowls were *extremely* clean when I pulled carbs last season. Bike
has had very little use since.
>>
>> There is a section in my Garbage-Clymer manual on "Pilot Screw Adjustment".
>> I haven't tried any of it.
>
>If you're looking for the adjusters, look on the right/exhaust side of
>the carbs in the lower front corner of the carb. If the non tamper caps
>are still on you will see a small grey screw head that will have limited
>movement (1/4 turn max each direction). I pried the caps off to find a
>smaller brass screw head underneath which was not limited in movement.
>
>>
>> There's no evidence that the motor is running either lean or rich.
>
> Check out Factorypro,com / Product Tech Support / CV Carb Tuning
>section for some tips on troubleshooting lean/rich conditions.
> I took my carbs apart for cleaning and played around with the throttle
>needle height, pilot screw setting, and main jet quite a bit. Why? I
>bought the bike with stock jetting and a Yoshimura full race only
>exhaust already installed. Ran super lean I had a few flat spots I had
>to dial out. I can go into more details on what I found/fixed, if you
>need the info.
My bike is 100% stock and I got no evidence (via plugs) of a mixture
problem.
> One indicator I used when I was tuning: If I revved the bike, and it
>'hung' before dropping down to idle, then it was too lean. If it dropped
>down to idle like a brick, it was too rich. Then I'd adjust the pilot
>screw and needle accordingly.
I've not noticed either condition.
> I've got two ideas. 1) Something has worn inside the carb allowing too
>much fuel to bog down the bike at those rpms. A float valve/leaking
>jet/or even worn throttle needle 2) A few years ago my
>Regulator/Rectifier melted and failed. I replaced it with a salvage yard
>(yet good) R/R and a fresh battery. The bike never fired up/idled and
>accelerated so smooth. After a few months, the stumble I had came back
>to normal, and just last year my second R/R burned up.
Hmmmmm. Interesting.
> As a side note, in the 15 years I've had it, I've had 6 batteries die.
>I have an electrical issue I haven't really troubleshot yet (stator).
>It's been a great bike otherwise.
Problem symptoms?
Back in the 90's it took po' me 2+ years to diagnose/fix an intermittent
elec. problem (failed to start at unpredictable times). It was the
pulse generator.
Thx,
P
" ... and the bees made honey in the lion's head."
- from "If I Had My Way", Blind Willie Johnson
Re: '87 CBR600: Lo-speed miss
On May 23, 7:21 pm, Puddin' Man <puddingDOT...@gmail,com > wrote:
> On Thu, 22 May 2008 21:31:46 -0700, red bowfire <red bowf...@SPAMsbcglobal,net > wrote:
> >Puddin' Man wrote:
> >> '87 CBR600, 20k easy mi.
>
> >> <snip>
>
> >> For the last 5 years or so, it's had a lo-speed miss. Chokes and burbles
> >> from about 1200-1500 rpm or so. Like its firing on 2 or 3 cyls. Very
> >> annoying in traffic.
>
> >> I pulled the Keihin CV carbs and cleaned them meticulously May '06.
>
> > If nothing was done mechanically to cause this then I'd have to say
> >it's possible something inside the carb has worn out to create a rich
> >condition. Got any spark plugs showing a lot of carbon?
>
> Nope. Pulled #1 and 2 plugs not long ago. Looked normal.
>
>
>
> >> The easy answer is crud in lower end of carbs. Doesn't seem to fit the facts.
>
> >I had the same thing happen when my Charcoal Cannister screen broke and
> >filled the float bowls with charcoal. If your float bowls are completely
> >clean then I'd go with the above.
>
> The bowls were *extremely* clean when I pulled carbs last season. Bike
> has had very little use since.
>
>
>
>
>
> >> There is a section in my Garbage-Clymer manual on "Pilot Screw Adjustment".
> >> I haven't tried any of it.
>
> >If you're looking for the adjusters, look on the right/exhaust side of
> >the carbs in the lower front corner of the carb. If the non tamper caps
> >are still on you will see a small grey screw head that will have limited
> >movement (1/4 turn max each direction). I pried the caps off to find a
> >smaller brass screw head underneath which was not limited in movement.
>
> >> There's no evidence that the motor is running either lean or rich.
>
> > Check out Factorypro,com / Product Tech Support / CV Carb Tuning
> >section for some tips on troubleshooting lean/rich conditions.
> > I took my carbs apart for cleaning and played around with the throttle
> >needle height, pilot screw setting, and main jet quite a bit. Why? I
> >bought the bike with stock jetting and a Yoshimura full race only
> >exhaust already installed. Ran super lean I had a few flat spots I had
> >to dial out. I can go into more details on what I found/fixed, if you
> >need the info.
>
> My bike is 100% stock and I got no evidence (via plugs) of a mixture
> problem.
>
> > One indicator I used when I was tuning: If I revved the bike, and it
> >'hung' before dropping down to idle, then it was too lean. If it dropped
> >down to idle like a brick, it was too rich. Then I'd adjust the pilot
> >screw and needle accordingly.
>
> I've not noticed either condition.
>
> > I've got two ideas. 1) Something has worn inside the carb allowing too
> >much fuel to bog down the bike at those rpms. A float valve/leaking
> >jet/or even worn throttle needle 2) A few years ago my
> >Regulator/Rectifier melted and failed. I replaced it with a salvage yard
> >(yet good) R/R and a fresh battery. The bike never fired up/idled and
> >accelerated so smooth. After a few months, the stumble I had came back
> >to normal, and just last year my second R/R burned up.
>
> Hmmmmm. Interesting.
>
> > As a side note, in the 15 years I've had it, I've had 6 batteries die.
> >I have an electrical issue I haven't really troubleshot yet (stator).
> >It's been a great bike otherwise.
>
> Problem symptoms?
>
> Back in the 90's it took po' me 2+ years to diagnose/fix an intermittent
> elec. problem (failed to start at unpredictable times). It was the
> pulse generator.
>
> Thx,
> P
>
> " ... and the bees made honey in the lion's head."
> - from "If I Had My Way", Blind Willie Johnson
The famous endings of Monty Python were: "And now for something
completely different"
It seems you have correct and clean carbs.
Maybe an IC igniter that has trouble timing low revs? I'd check
timing with a stroboscope.
Rob.
On May 23, 7:21 pm, Puddin' Man <puddingDOT...@gmail,com > wrote:
> On Thu, 22 May 2008 21:31:46 -0700, red bowfire <red bowf...@SPAMsbcglobal,net > wrote:
> >Puddin' Man wrote:
> >> '87 CBR600, 20k easy mi.
>
> >> <snip>
>
> >> For the last 5 years or so, it's had a lo-speed miss. Chokes and burbles
> >> from about 1200-1500 rpm or so. Like its firing on 2 or 3 cyls. Very
> >> annoying in traffic.
>
> >> I pulled the Keihin CV carbs and cleaned them meticulously May '06.
>
> > If nothing was done mechanically to cause this then I'd have to say
> >it's possible something inside the carb has worn out to create a rich
> >condition. Got any spark plugs showing a lot of carbon?
>
> Nope. Pulled #1 and 2 plugs not long ago. Looked normal.
>
>
>
> >> The easy answer is crud in lower end of carbs. Doesn't seem to fit the facts.
>
> >I had the same thing happen when my Charcoal Cannister screen broke and
> >filled the float bowls with charcoal. If your float bowls are completely
> >clean then I'd go with the above.
>
> The bowls were *extremely* clean when I pulled carbs last season. Bike
> has had very little use since.
>
>
>
>
>
> >> There is a section in my Garbage-Clymer manual on "Pilot Screw Adjustment".
> >> I haven't tried any of it.
>
> >If you're looking for the adjusters, look on the right/exhaust side of
> >the carbs in the lower front corner of the carb. If the non tamper caps
> >are still on you will see a small grey screw head that will have limited
> >movement (1/4 turn max each direction). I pried the caps off to find a
> >smaller brass screw head underneath which was not limited in movement.
>
> >> There's no evidence that the motor is running either lean or rich.
>
> > Check out Factorypro,com / Product Tech Support / CV Carb Tuning
> >section for some tips on troubleshooting lean/rich conditions.
> > I took my carbs apart for cleaning and played around with the throttle
> >needle height, pilot screw setting, and main jet quite a bit. Why? I
> >bought the bike with stock jetting and a Yoshimura full race only
> >exhaust already installed. Ran super lean I had a few flat spots I had
> >to dial out. I can go into more details on what I found/fixed, if you
> >need the info.
>
> My bike is 100% stock and I got no evidence (via plugs) of a mixture
> problem.
>
> > One indicator I used when I was tuning: If I revved the bike, and it
> >'hung' before dropping down to idle, then it was too lean. If it dropped
> >down to idle like a brick, it was too rich. Then I'd adjust the pilot
> >screw and needle accordingly.
>
> I've not noticed either condition.
>
> > I've got two ideas. 1) Something has worn inside the carb allowing too
> >much fuel to bog down the bike at those rpms. A float valve/leaking
> >jet/or even worn throttle needle 2) A few years ago my
> >Regulator/Rectifier melted and failed. I replaced it with a salvage yard
> >(yet good) R/R and a fresh battery. The bike never fired up/idled and
> >accelerated so smooth. After a few months, the stumble I had came back
> >to normal, and just last year my second R/R burned up.
>
> Hmmmmm. Interesting.
>
> > As a side note, in the 15 years I've had it, I've had 6 batteries die.
> >I have an electrical issue I haven't really troubleshot yet (stator).
> >It's been a great bike otherwise.
>
> Problem symptoms?
>
> Back in the 90's it took po' me 2+ years to diagnose/fix an intermittent
> elec. problem (failed to start at unpredictable times). It was the
> pulse generator.
>
> Thx,
> P
>
> " ... and the bees made honey in the lion's head."
> - from "If I Had My Way", Blind Willie Johnson
The famous endings of Monty Python were: "And now for something
completely different"
It seems you have correct and clean carbs.
Maybe an IC igniter that has trouble timing low revs? I'd check
timing with a stroboscope.
Rob.
Re: '87 CBR600: Lo-speed miss
On Sat, 24 May 2008 16:24:51 -0700 (PDT), oldgeezer <schreuderrob@yahoo,com > wrote:
>The famous endings of Monty Python were: "And now for something
>completely different"
>
>It seems you have correct and clean carbs.
It's at least a possibility, if not a likelihood.
>Maybe an IC igniter that has trouble timing low revs? I'd check
>timing with a stroboscope.
Alas, po' me lacks both the skill and the (stroboscope) device! :-(
Thx,
P
" ... and the bees made honey in the lion's head."
- from "If I Had My Way", Blind Willie Johnson
On Sat, 24 May 2008 16:24:51 -0700 (PDT), oldgeezer <schreuderrob@yahoo,com > wrote:
>The famous endings of Monty Python were: "And now for something
>completely different"
>
>It seems you have correct and clean carbs.
It's at least a possibility, if not a likelihood.
>Maybe an IC igniter that has trouble timing low revs? I'd check
>timing with a stroboscope.
Alas, po' me lacks both the skill and the (stroboscope) device! :-(
Thx,
P
" ... and the bees made honey in the lion's head."
- from "If I Had My Way", Blind Willie Johnson
