Carbs - Slide Guide

I 've just finished reinstalling my existing carbs (1993 900SS) with a
used slide guide I purchased from eBay, hence the bike now idles
correct. However a road test discovered that under full throttle there
is very little power like 0 - 60 mph is 20 seconds! Well maybe not
that bad.

Proir the used slide guide the bike had very good excelleration
however it backfired badly, due to a hole blown through the original
slide guide.

I can tell you that when I reinstalled the diaphragm it did not appear
to seat correctly within the channel made for it. I just assume when I
put the screws / diaphragm cover back on it seat itself in the right
position. Any tips?

Another possibility: could I have adjusted the throttle cables
incorrectly? Is there a trick to adjusting them?

Thats all the results I have to this point, any ideas? Anybody?

Cheers!

cant help sorry, but do you belong or use www.ducati.ms helps of cluey
people there


"Greg" <greghastings@sentex.ca> wrote in message
news:1184421588.022642.244340@g4g2000hsf.googlegro ups.com...
>I 've just finished reinstalling my existing carbs (1993 900SS) with a
> used slide guide I purchased from eBay, hence the bike now idles
> correct. However a road test discovered that under full throttle there
> is very little power like 0 - 60 mph is 20 seconds! Well maybe not
> that bad.
>
> Proir the used slide guide the bike had very good excelleration
> however it backfired badly, due to a hole blown through the original
> slide guide.
>
> I can tell you that when I reinstalled the diaphragm it did not appear
> to seat correctly within the channel made for it. I just assume when I
> put the screws / diaphragm cover back on it seat itself in the right
> position. Any tips?
>
> Another possibility: could I have adjusted the throttle cables
> incorrectly? Is there a trick to adjusting them?
>
> Thats all the results I have to this point, any ideas? Anybody?
>
> Cheers!
>

corks wrote:
> cant help sorry, but do you belong or use www.ducati.ms helps of cluey
> people there
>
>
> "Greg" <greghastings@sentex.ca> wrote in message
> news:1184421588.022642.244340@g4g2000hsf.googlegro ups.com...
>> I 've just finished reinstalling my existing carbs (1993 900SS) with a
>> used slide guide I purchased from eBay, hence the bike now idles
>> correct. However a road test discovered that under full throttle there
>> is very little power like 0 - 60 mph is 20 seconds! Well maybe not
>> that bad.
>>
>> Proir the used slide guide the bike had very good excelleration
>> however it backfired badly, due to a hole blown through the original
>> slide guide.
>>
>> I can tell you that when I reinstalled the diaphragm it did not appear
>> to seat correctly within the channel made for it. I just assume when I
>> put the screws / diaphragm cover back on it seat itself in the right
>> position. Any tips?
>>
>> Another possibility: could I have adjusted the throttle cables
>> incorrectly? Is there a trick to adjusting them?
>>
>> Thats all the results I have to this point, any ideas? Anybody?
>>
>> Cheers!
>>
>
>

The diaphragm is likely the culprit, remove the airfilter boks and lift
the slide with your finger, does it move smoothly? Does it go al the way
to the top?
Cables concerned, check for full butterfly opening while you have the
airbox out, simple really, twist the throttle max and see that the carb
linkage moves all the way to the positive stop..

There is a little trick to seat old diaphragms, first of all be careful
not to stretch upon removing. Also be careful with carbcleaner or
soaking solutions, as these can make rubber swell.
To assemble, seat the diaphragm as far as it will go into its retaining
groove. Then insert spring and place the plastic top lightly onto carb,
then resting on the unwieldy rubber diaphragm, move it gently from side
to side applying light pressure, until you feel the rubber pop into its
groove. Now you can see and feel the plastic top being fully seated
against carb body.

P.J.Berg

On Jul 14, 10:09 pm, Berg <bo...@bogus.com.Invalid> wrote:
> corks wrote:
> > cant help sorry, but do you belong or usewww.ducati.mshelps of cluey
> > people there
>
> > "Greg" <greghasti...@sentex.ca> wrote in message
> >news:1184421588.022642.244340@g4g2000hsf.googlegr oups.com...
> >> I 've just finished reinstalling my existing carbs (1993 900SS) with a
> >> used slide guide I purchased from eBay, hence the bike now idles
> >> correct. However a road test discovered that under full throttle there
> >> is very little power like 0 - 60 mph is 20 seconds! Well maybe not
> >> that bad.
>
> >> Proir the used slide guide the bike had very good excelleration
> >> however it backfired badly, due to a hole blown through the original
> >> slide guide.
>
> >> I can tell you that when I reinstalled the diaphragm it did not appear
> >> to seat correctly within the channel made for it. I just assume when I
> >> put the screws / diaphragm cover back on it seat itself in the right
> >> position. Any tips?
>
> >> Another possibility: could I have adjusted the throttle cables
> >> incorrectly? Is there a trick to adjusting them?
>
> >> Thats all the results I have to this point, any ideas? Anybody?
>
> >> Cheers!
>
> The diaphragm is likely the culprit, remove the airfilter boks and lift
> the slide with your finger, does it move smoothly? Does it go al the way
> to the top?
> Cables concerned, check for full butterfly opening while you have the
> airbox out, simple really, twist the throttle max and see that the carb
> linkage moves all the way to the positive stop..
>
> There is a little trick to seat old diaphragms, first of all be careful
> not to stretch upon removing. Also be careful with carbcleaner or
> soaking solutions, as these can make rubber swell.
> To assemble, seat the diaphragm as far as it will go into its retaining
> groove. Then insert spring and place the plastic top lightly onto carb,
> then resting on the unwieldy rubber diaphragm, move it gently from side
> to side applying light pressure, until you feel the rubber pop into its
> groove. Now you can see and feel the plastic top being fully seated
> against carb body.
>
> P.J.Berg

Thanks I'll give it a try this week and let you know how it went.

Cheers!
Greg

On Jul 15, 9:39 pm, Greg <greghasti...@sentex.ca> wrote:
> On Jul 14, 10:09 pm, Berg <bo...@bogus.com.Invalid> wrote:
>
>
>
> > corks wrote:
> > > cant help sorry, but do you belong or usewww.ducati.mshelpsof cluey
> > > people there
>
> > > "Greg" <greghasti...@sentex.ca> wrote in message
> > >news:1184421588.022642.244340@g4g2000hsf.googlegr oups.com...
> > >> I 've just finished reinstalling my existing carbs (1993 900SS) with a
> > >> used slide guide I purchased from eBay, hence the bike now idles
> > >> correct. However a road test discovered that under full throttle there
> > >> is very little power like 0 - 60 mph is 20 seconds! Well maybe not
> > >> that bad.
>
> > >> Proir the used slide guide the bike had very good excelleration
> > >> however it backfired badly, due to a hole blown through the original
> > >> slide guide.
>
> > >> I can tell you that when I reinstalled the diaphragm it did not appear
> > >> to seat correctly within the channel made for it. I just assume when I
> > >> put the screws / diaphragm cover back on it seat itself in the right
> > >> position. Any tips?
>
> > >> Another possibility: could I have adjusted the throttle cables
> > >> incorrectly? Is there a trick to adjusting them?
>
> > >> Thats all the results I have to this point, any ideas? Anybody?
>
> > >> Cheers!
>
> > The diaphragm is likely the culprit, remove the airfilter boks and lift
> > the slide with your finger, does it move smoothly? Does it go al the way
> > to the top?
> > Cables concerned, check for full butterfly opening while you have the
> > airbox out, simple really, twist the throttle max and see that the carb
> > linkage moves all the way to the positive stop..
>
> > There is a little trick to seat old diaphragms, first of all be careful
> > not to stretch upon removing. Also be careful with carbcleaner or
> > soaking solutions, as these can make rubber swell.
> > To assemble, seat the diaphragm as far as it will go into its retaining
> > groove. Then insert spring and place the plastic top lightly onto carb,
> > then resting on the unwieldy rubber diaphragm, move it gently from side
> > to side applying light pressure, until you feel the rubber pop into its
> > groove. Now you can see and feel the plastic top being fully seated
> > against carb body.
>
> > P.J.Berg
>
> Thanks I'll give it a try this week and let you know how it went.
>
> Cheers!
> Greg

"P.J", Job well done. Bike runs great. Just seems to be missing a
little around 7500-8000rpm.

Thanks for your help.

Cheers!
Greg

Greg wrote:
> "P.J", Job well done. Bike runs great. Just seems to be missing a
> little around 7500-8000rpm.

That's past peak power, change up :-)

--
Trev
'95 900SS

Greg wrote:
> On Jul 15, 9:39 pm, Greg <greghasti...@sentex.ca> wrote:
>> On Jul 14, 10:09 pm, Berg <bo...@bogus.com.Invalid> wrote:
>>
>>
>>
>>> corks wrote:
>>>> cant help sorry, but do you belong or usewww.ducati.mshelpsof cluey
>>>> people there
>>>> "Greg" <greghasti...@sentex.ca> wrote in message
>>>> news:1184421588.022642.244340@g4g2000hsf.googlegro ups.com...
>>>>> I 've just finished reinstalling my existing carbs (1993 900SS) with a
>>>>> used slide guide I purchased from eBay, hence the bike now idles
>>>>> correct. However a road test discovered that under full throttle there
>>>>> is very little power like 0 - 60 mph is 20 seconds! Well maybe not
>>>>> that bad.
>>>>> Proir the used slide guide the bike had very good excelleration
>>>>> however it backfired badly, due to a hole blown through the original
>>>>> slide guide.
>>>>> I can tell you that when I reinstalled the diaphragm it did not appear
>>>>> to seat correctly within the channel made for it. I just assume when I
>>>>> put the screws / diaphragm cover back on it seat itself in the right
>>>>> position. Any tips?
>>>>> Another possibility: could I have adjusted the throttle cables
>>>>> incorrectly? Is there a trick to adjusting them?
>>>>> Thats all the results I have to this point, any ideas? Anybody?
>>>>> Cheers!
>>> The diaphragm is likely the culprit, remove the airfilter boks and lift
>>> the slide with your finger, does it move smoothly? Does it go al the way
>>> to the top?
>>> Cables concerned, check for full butterfly opening while you have the
>>> airbox out, simple really, twist the throttle max and see that the carb
>>> linkage moves all the way to the positive stop..
>>> There is a little trick to seat old diaphragms, first of all be careful
>>> not to stretch upon removing. Also be careful with carbcleaner or
>>> soaking solutions, as these can make rubber swell.
>>> To assemble, seat the diaphragm as far as it will go into its retaining
>>> groove. Then insert spring and place the plastic top lightly onto carb,
>>> then resting on the unwieldy rubber diaphragm, move it gently from side
>>> to side applying light pressure, until you feel the rubber pop into its
>>> groove. Now you can see and feel the plastic top being fully seated
>>> against carb body.
>>> P.J.Berg
>> Thanks I'll give it a try this week and let you know how it went.
>>
>> Cheers!
>> Greg
>
> "P.J", Job well done. Bike runs great. Just seems to be missing a
> little around 7500-8000rpm.
>
> Thanks for your help.
>
> Cheers!
> Greg
>
You are more than welcome, glad I could be of assistance.

P.J.

On Jul 20, 3:11 am, Trevor Best <newsre...@besty.org.uk> wrote:
> Greg wrote:
> > "P.J", Job well done. Bike runs great. Just seems to be missing a
> > little around 7500-8000rpm.
>
> That's past peak power, change up :-)
>
> --
> Trev
> '95 900SS

Hi Trev,

I was mistaken, my bike appears to loose power around 6500 rpm. I
don't remember it peaking so low before. Funny thing is prior doing
any work to the carbs there wasn't a problem with the "top end" power
and I made curtain not to disturb or remove anything other than, what
I call the "slide guide" and the diaphragm. Come to think about it
someone on another site mentioned to check the diaphragm for small
holes by holding it up to a light source. Humm, I forgot to check
that. Trev, where does your bike reach peak power and is it stock?

Cheers!

Greg

Greg wrote:
> I was mistaken, my bike appears to loose power around 6500 rpm. I
> don't remember it peaking so low before. Funny thing is prior doing
> any work to the carbs there wasn't a problem with the "top end" power
> and I made curtain not to disturb or remove anything other than, what
> I call the "slide guide" and the diaphragm. Come to think about it
> someone on another site mentioned to check the diaphragm for small
> holes by holding it up to a light source. Humm, I forgot to check
> that. Trev, where does your bike reach peak power and is it stock?

Actually, I hardly ever get it up there as I mostly commute on it but
I'd say around 7-7.5K, stock apart from Termis ans dynojet.

--
Trev
'95 900SS

On Jul 24, 3:14 am, Trevor Best <newsre...@besty.org.uk> wrote:
> Greg wrote:
> > I was mistaken, my bike appears to loose power around 6500 rpm. I
> > don't remember it peaking so low before. Funny thing is prior doing
> > any work to the carbs there wasn't a problem with the "top end" power
> > and I made curtain not to disturb or remove anything other than, what
> > I call the "slide guide" and the diaphragm. Come to think about it
> > someone on another site mentioned to check the diaphragm for small
> > holes by holding it up to a light source. Humm, I forgot to check
> > that. Trev, where does your bike reach peak power and is it stock?
>
> Actually, I hardly ever get it up there as I mostly commute on it but
> I'd say around 7-7.5K, stock apart from Termis ans dynojet.
>
> --
> Trev
> '95 900SS

Okay guys new problem, via old problem.

My 1993 900SS now appears I have good, not great acceleration.
With a quick twist of the throttle I recall the front wheel easily
lifting off the ground in first gear as well as in 6th gear quickly
reaching 240km. Now the front wheel won't lift and I only have a top
speed of 150 km.

Any ideas?

Cheers
Greg