Potential for PPP

[Call Me Ahab]

Aha... so then it shouldn't make a difference nowadays which I choose to go with - to my knowledge, my bikes have never been emissions tested anyways...

Am I correct in my inference then, that they are all safe to use?

well there are different specs because it was dependant on which country they were being shipped to for sale some countries were stricter than others when it came to emissions control

 

[Spyderman]

Aha... so then it shouldn't make a difference nowadays which I choose to go with - to my knowledge, my bikes have never been emissions tested anyways...

Am I correct in my inference then, that they are all safe to use?

yes sir you would be correct they are all safe to use how ever i would use whichever is closest to what you have for example needle number (5D57-3) the number after the dash is the position that the clip is in on the slots on the needle 1= rich 5= lean the higher you lift the needle away from the carb venturi the richer it gets

 

[BigD_83]

yes sir you would be correct they are all safe to use how ever i would use whichever is closest to what you have for example needle number (5D57-3) the number after the dash is the position that the clip is in on the slots on the needle 1= rich 5= lean the higher you lift the needle away from the carb venturi the richer it gets

Now there is a new piece of information that I didn't know. Thank you, Spydie...

 

[Call Me Ahab]

yes sir you would be correct they are all safe to use how ever i would use whichever is closest to what you have for example needle number (5D57-3) the number after the dash is the position that the clip is in on the slots on the needle 1= rich 5= lean the higher you lift the needle away from the carb venturi the richer it gets

AHA! Thank you! that one blew my mind a bit, I've been googling all kinda weirdness trying to interpret that, it never occured to me that it was a needle - CLIP; not needle-clip as in a.. clip... i can't explain myself, but I seriously misunderstood. Thanks for clearing that one up

 

[Spyderman]

your welcome gents glad i could help

 

[Call Me Ahab]

You've all been fantastic, and i have but one final question before I order new Air Jets, Pilot Jets, Main jets and my diaphragm...

Am I correct in understanding that the smaller size jets will yield increased high-end power and speed? Or do I have this backwards? I'd just like to be sure I've got everything in a row before I make my purchase. Also, z1enterprises doesn't seem to sell air jets, is that what I'd need a "DynoJet Kit" for?

 

[hillsy]

The correct sized jets will give you the best performance. It's not a case of smaller is better (although if the bike is running rich, then smaller jets are the way to go).

A Dynojet kit will normally come with a selection of main and pilot jets, and a set of needles. It may come with a drill to drill out the slides but normally they don't come with air jets (they sometimes come with a drill to drill out the stock air jets).

It's kinda neat to have all that stuff, but really if your needles are not worn, then just getting replacement main and pilot jets will be fine - and buying the jets by themselves will be far cheaper than a Dynojet kit.

 

[Spyderman]

what your after is
getting the correct air fuel ratio (AFR) 14.7 is ideal
but anywhere close will do
but always better to be a bit on the rich side that too lean
when your in the neighbourhood you will know because the engine will run as it should
with a factory air box and factory exhaust you have a set amount of air entering and exiting the engine
the factory jet sizes air, pilot, main will introduce close to the perfect amount of fuel into the intake system for the engine to run correctly
anytime you change the amount of air coming into or leaving the engine then you need to rejet to get back to the correct AFR
so by retirning your bikes carbs back to factory specs because you have factory airbox and exhaust you should get a motorcycle that will run as it was designed to in the first place

good luck with everything and let us know how you get on with your bike

 

[81GS850]

One thing I didn't see mentioned was verify the float level on these carbs first. That will affect all throttle positions. Also I thought the "stock" needles only had one clip position. It's the aftermarket needles that have more than one position. I could be wrong though.

 

[Spyderman]

I might be wrong but i thought early on i suggested that float height be checked and you may be correct about the needles i do
know that some of the canadian ones had adjustable needle and not sure if they were the same in other countries besides the US

 

[81GS850]

I might be wrong but i thought early on i suggested that float height be checked and you may be correct about the needles i do
know that some of the canadian ones had adjustable needle and not sure if they were the same in other countries besides the US

Ok my bad if it was already suggested, I was kind of speed reading and I didn't see it or the OP saying it was confirmed. I thought at 4-5k you'd be at part throttle which isn't that the needles job and the main jet only comes into play at 3/4 to full throttle?

 

[Call Me Ahab]

All right, sounds great! I checked the float levels when I pulled the carbs off, they're within spec, I did have to adjust one though. Beyond that, I'll pull out the needle and take a look at that - I'm curious now to see if the stock one does have different clip positions.

I'll pass on the Dyno jet kit, $95 vs 15? I'll stick with just what I need for now. Maybe in the future when I can afford to replace the exhaust, I'll step up to a kit, but not now.

I've found another manual for the GS1000G, this one does look like it was made for my bike specifically - everything looks 'just right.' About to place my order, I'll keep checking in on this thread in case anyone else has recommendations or information - and I will update here once the new jets are in.

Beyond that, I think I've got a suitable understanding now of what I'm about to do. I'll be reading around to learn more on the subject for future reference, as I'd like to learn how to re-jet if I'm not using stock. I see some places have a "sliding scale" where if you go from stock exhaust to -x- exhaust, increase by x number, but I'm not sure how accurate that is. But again, I'm still looking around at this, so I suppose someone somewhere has discredited / confirmed this approach.

My sincere thanks to everyone involved! This is one task that was far beyond me, having never adjusted the jets before. Now I want to tear the carbs off the 850 and check those jets too... But maybe not, before the R/R melted it ran okay... Something to ponder. Thanks again everyone; if you all have more info or recommendations by all means let me know!

 

[81GS850]

K.I.S.S.

Keep It Simple Stupid!!!!


If it's not broke don't fix it leave the GS850 alone and move onto other problems.

Good luck with the 1000.

 

[Call Me Ahab]

K.I.S.S.

Keep It Simple Stupid!!!!


If it's not broke don't fix it leave the GS850 alone and move onto other problems.

Good luck with the 1000.

Hah, fair enough!

I almost forgot, someone was asking for pics of the jets that I'd pulled: Left is Main - Right is Main Air

And this is Pilot

 

[Call Me Ahab]

EDIT: I had to find the answer to a problem elsewhere, but it looks like the BS30/96 jets are completely interchangeable with the jet w/ no holes. That one's resolved. Main jet, however, will it be okay if I go with a 112.5 rather than a 115? 115's are out of stock currently.
EDIT 2: Found the Main, Pilot, and Air jets from Niche-Supply on eBay. All have been ordered. The only difference will be the air jets, 175 as opposed to 170s.

 

[81GS850]

I would try to get exactly what it calls for. That way there's no guessing. The main "might" run a little leaner than the factory which "might" cause problems since these were jetting lean from the factory so everyone says.... Those jets look like they might've been drilled, at least the air jet does.


Someone more experienced will chime in.

 

[Call Me Ahab]

I've been able to confirm that - even the main jets, side by side with other 120's are way wrong... And I do agree - I'm actually going to go one size up from factory to a 117.5, as per recommendation made by a friendly ghost in the machine.

I've been able to place the order - but those air jets were hell to find... In fact, the only store that I can find is on eBay and they were out of stock on the one I needed, so I'm going to have to bore out a set of 155s to make them = 170s.

Aside from that little hiccup, all is going well!

For the folks who may need the Air Jets / Main Jets / Pilot Jets - z1 is great, and they're cheap, but they are currently out of stock of some jets... I found a great (though not 100% complete) set @ http://www.nichecycle.com/

 

[BigD_83]

Did you try jetsrus? I don't know the difference between them, but they list air jets for the BS30/97; does anyone know the difference between it and the BS30/96 listed by Call Me Ahab?

Sirius Consolidated is another one in Canada that can often get what you need, although the website isn't the most informative at times. They are responsive to email, or have been for me in the past.

 

[Call Me Ahab]

Good to know - I keep a list of the vendors I use and what for, those are going in.

So far the folks at Niche-Supply have been pretty helpful, despite me screwing up the order (twice)