How to Jet Your Carbs - Article

[KEITH KRAUSE]

yes, well, this is EXACTLY what i am talking about.....it is here, but not centralized. like doing a google search.....lot of good 2,148,584,234 hits does me... i know there are infinite (well, ok, maybe not infinite....but several? a lot? ) of combinations of pipes, filters, pods, jets, etc. etc. etc. but even to get the basic, stock, setup, or even just "carb theory" (which circuits do what, how the air and fuel flow through the carbs, heck, i would LOVE to see a diagram of where all the tiny orifices and passageways go and what they do....) would be helpful to us newbies, and maybe save you guys (keith, seriously, you are a patient dude....) some head banging answering stupid questions.....](*,)](*,)](*,)......

btw, my 78 750 RUNS!!!!!!!!!!!!!! just need to tune those carbs.......

greg

I don't mind any question. I like to help if I can. Talk about feeling stupid, I feel pretty dumb asking questions at ZX websites about my new 14. Fuel injection, maps, computers, sensors...Lot to learn about the new bikes.
Only time I get a little burned out around here is if I stick with someone through a problem (sometimes for weeks) and they just disappear without saying a thing. I know once in awhile the person has a good reason but there are some who don't.

[RJz1100E]

this raises a question for me. i have read a MILLION threads about jetting, and have absorbed the wisdom of mr keith krause (who, in my opinion, comes somewhere just below frank in my hierarchy of gs deities..along with nessism, bwringer, cliff, and maybe a few others...) , well, if not like a sponge, then at least like a paper towel. Is there a thread somewhere that pulls together all the general jetting/tuning info together, like the carb rebuild series or the stator papers, that we could make a sticky or put in the garage section?

maybe included could be a diagram of the pathways in the carbs, so semi-retarded people like me can get our heads around exactly what is happening where and when? i am talking about a comprehensive, thorough document distilling the wisdom of the gods into a holy (or would it be unholy???) guide to gs carburetion paradise!!

maybe this already exists in some form, i am sure it does, but lets get it front and center!!

just an idea,

greg

oh, and everytime i see "keith krause" by a post, i read it first.....thanks keith!!

The chef knows his stuff too about rejetting. He did mine from across the country and when I put the carbs back on my bike today...
Well let me just say that he nailed it.

http://www.thegsresources.com/_forum/showpost.php?p=794409&postcount=1

[Suzuki_Don]

I don't mind any question. I like to help if I can. Talk about feeling stupid, I feel pretty dumb asking questions at ZX websites about my new 14. Fuel injection, maps, computers, sensors...Lot to learn about the new bikes.
Only time I get a little burned out around here is if I stick with someone through a problem (sometimes for weeks) and they just disappear without saying a thing. I know once in awhile the person has a good reason but there are some who don't.

Keith I hope I am not one of those people. You are a true expert and don't mind passing on your expertise. I have learnt a lot now. Thanks for advice on the brass plate thingo in my VM slide, I am very adept at stuffing all the bits in the lide and popping in the small screws and lining everything up. Did you check out my link on cleaning my carbs http://www.thegsresources.com/_forum...d.php?t=122547

[03svrider]

i have an 81 gs450li put a mac 2 into 1 exhaust on and i do plane on keeping the baffle in. wayyyy too loud without it. the carbs were cleaned and reinstalled by a pro when i bought it but now with the different exhaust i think they need to be rejetted. i ran it with the new exhaust on and it hesitated and didn't rev too well without messing with the throttle to get it into higher than idle rpms. i want it jetted right but i don't trust myself to do it. what would be the best suggestion? members on here have suggested i need to go up one size on the main jet. looking at the carb cleaning article i'm pretty sure i can change just the main jet but i'm not willing to go any further than that. i would rather pay to get it jetted if it gets more complicated than changing just the main jet. i don't trust my patience or mechanical aptitude for something more than doing the main jet. and thanks to nessism for all his previous advice on the subject.

[srsupertrap]

I hope you don't mean in your garage. I do this on a great staight away. Uphill is even better. Full throttle as long as possible and hit the kill switch without closing the throttle. Coast to the side and pull a plug.

No, definitely not in the garage. I am on the same page with the plug chop methodology but I usually only end up looking @ plugs 1 & 4.

[BassCliff]

Your humble servant

this raises a question for me. i have read a MILLION threads about jetting, and have absorbed the wisdom of mr keith krause (who, in my opinion, comes somewhere just below frank in my hierarchy of gs deities..along with nessism, bwringer, cliff, and maybe a few others...)

Hi Mr. greg78gs750,

Oh man. I should not even be mentioned in the same breath with those guys. But I agree that there are quite a few helpful, friendly members who know these bikes like the back of their hand. I'm just not one of them. With their help, maybe someday.

I've collected a couple of notes re: carb jetting on my little BikeCliff website. I'd be happy to host a definitive article on the subject as it pertains to our GS bikes. I would imagine that Frank or one of his assistants (Dan) could find some space in the Garage Section for it too.

Thank you for your indulgence,

BassCliff

[greg78gs750]

well, cliff, i dunno about that.....your site and posts have been of invaluable help to me, so, really, thank you!!!

[KEITH KRAUSE]

Keith I hope I am not one of those people. You are a true expert and don't mind passing on your expertise. I have learnt a lot now. Thanks for advice on the brass plate thingo in my VM slide, I am very adept at stuffing all the bits in the lide and popping in the small screws and lining everything up. Did you check out my link on cleaning my carbs http://www.thegsresources.com/_forum...d.php?t=122547

No, you're not one of those people. Checked out your thread but you're done with it now.
I'm no expert, just made more mistakes than a person should be allowed to and I try to help others avoid the same.

[greg78gs750]

hey, have you guys checked out the link in that other post about carb circuits? it has some pretty nice diagrams...

[greg78gs750]

http://www.thegsresources.com/_forum/showthread.php?t=122781

[bleeble]

I know... I'm late to the party again.

I don't know if anyone mentioned it or not, but BassCliff has carb manuals for our bikes on his website. You could also pick up Sudco's Mikuni Tuning Manual (http://www.z1enterprises.com/detail.aspx?ID=231). It doesn't specifically cover the carbs on our bikes, but it does introduce the basic principles then shows how they work with real carbs. There are plenty of exploded views and cutaways so you can see how things are working. It also covers set-up, tuning, and troubleshooting (good for newbies like me).

No, I'm not a Sudco rep. :-P I just happened to pick one up with an order and found it to be a much better reference than most of the vague, cobbled-together stuff I've seen online.