• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

Garble noise, lack of power; 80 GS850G

  • Thread starter Thread starter MUBULLDOG
  • Start date Start date
M

MUBULLDOG

Guest
Ok the 122.5 mains are on and did pilot jet tune. Idles around 1300 to 1400 rpms. When on the center stand (tank was off and set on prime) I could rev it up & hold at 6K (very smooth) and then settles back below 1500. Took it out for a spin and everything sounded good with good power all the way to 50mph. Then it started the "garble" sound and I could give it more throttle but it didn't help, just made it "garble" more. Below is the list of things I know;
1. With pods and 4 into 1 pipes & the 92.5 mains; runs up to 55-60 mph and starts the "grable" sound with no more power.
2. Pods OFF and 4 into 1 & 95.5 mains: runs up to 65-70 and starts to garble and no more power.
3. Stock airbox and 4 into 1 pipes & the 92.5 mains; runs up to 55-60 mph and starts the "grable" sound with no more power
4. Stock airbox and 4 into 1 pipes & the 122.5 mains; runs up to 50 mph and starts the "grable" sound with no more power.

PO put the pipes and cheap pods on. Not sure why someone would put 92.5 mains jets on.

Where do I go from here?
 
If someone put 92 mains in, maybe they got creative with needles also- any way for you to compare them against known stock ones?
By "garble", I assume you mean it appears to be choking as it gets loaded in mid range.
 
What are the original main jet sizes?

You should be just a few sizes bigger...
 
Tom, the sound is almost like a burbing sound, at the speeds I stated. Could the 4 into 1 pipes, that the PO install, be part of the problem?
 
MUBULLDOG said:
Ok the 122.5 mains are on and did pilot jet tune. Idles around 1300 to 1400 rpms. When on the center stand (tank was off and set on prime) I could rev it up & hold at 6K (very smooth) and then settles back below 1500. Took it out for a spin and everything sounded good with good power all the way to 50mph. Then it started the "garble" sound and I could give it more throttle but it didn't help, just made it "garble" more. Below is the list of things I know;
1. With pods and 4 into 1 pipes & the 92.5 mains; runs up to 55-60 mph and starts the "grable" sound with no more power.
2. Pods OFF and 4 into 1 & 95.5 mains: runs up to 65-70 and starts to garble and no more power.
3. Stock airbox and 4 into 1 pipes & the 92.5 mains; runs up to 55-60 mph and starts the "grable" sound with no more power
4. Stock airbox and 4 into 1 pipes & the 122.5 mains; runs up to 50 mph and starts the "grable" sound with no more power.

PO put the pipes and cheap pods on. Not sure why someone would put 92.5 mains jets on.

Where do I go from here?
Click to expand...
1. You need a DynoJet Stage III kit
2. Won't run right without any filter
3. You need a DynoJet Stage I kit, which is included in the DynoJet Stage II kit
4. See 3.
And you need either K&N or APE pods. Those pods will be almost impossible to tune.
 
Hey tKent02, well the stock mains should have been 115, however what I removed have a 92.5 stamped on them. Everythin that I have read so far, and Steve (GS member), state that if you go to pods and 4 into 1 pipes, then you have to go up to 122.5 maybe 127. Steve's son has stock airbox with pipes and he installed 120 and his 850 runs good. Maybe I do need to take a look at the needles. As I said before, when I was running w/o the pods & the 92.5 mains, I could go up 65mph before the lack of power started. Plus the carbs started the burbing sound.
 
Hi koolaide, you say that is won't run without filters. Well that's when it ran the best, up to 65-70 mph, with those weird 92.5 mains. So could have been running rich? With the other setups it seem to be choking out at 50-55mph. Also, I can't find the make nor model of the pipes that the PO put on. So could the pipes be incorrect or have something to do with this issue. Should I pull the muffler and run it and see what happens? Thanks
 
Well talk about learning about carbs. After everything I found on this set of carbs and comparing the part numbers and jet sizes to the attachment (Suzuki GS Carb Database). I really thought that this set came of an early 80's (80-82) GS550. The mains; 92.5 with the 150 pilot air jets, the jet needles stamped 4BEL2, and I found out the correct name for the needle jet (stamped X-6). They are called "Primary-Bleed Type Needle Jets". GS member Billy Ricks replied to my post, "Needle jets look different", with a very informative link to a google book that shows this needle jet. The link is below and the info is on page 177. Oh yea, when I removed all 4 of throttle slides (to check the needle numbers), I found three X-6 and one X-5 needle. So 3 slides were a different length than the 1. Crazy way to learn LOL.

I have alot of new parts, here's what I have done to this set of carbs; Installed the following: 180 pilot air jets, 122.5 mains, 47.5 pilots, used the 4 matching throttle slides with X-5 needles (I lefted the 0.5mm shims under the needles). Going to put them on today and tune as best as possible. I don't have a carb synchronizer so that won't happen today. Take it for a spin and see if it has any power at 3/4 to full throttle.

Wow, it ran very nice! Started with the 2 1/2 turns off set, ended up about 1 1/2 to 1 3/4 of set.

Thanks to all the GS family for the info
 
tkent02 said:
What are the original main jet sizes?

You should be just a few sizes bigger...
Click to expand...


For the 850G/850GL stock size is 115. 92 seems a bit anemic to me, unless they were looking for good long-range cruising with better fuel range per tank?

I am guessing the pilot air jets were smaller too? 160 or less I would imagine

EDIT: Just read above post....lol
 
You must log in or register to reply here.
Back
Top