Ok, I have my carbs off the bike, taken apart (mostly), and cleaned. I'vedone my fair share of searching on here, but I still have some questions.
In the mail, I have:
- 2 carb rebuild kits
- 40 pilot jets
- 140 main jets
- new pilot screws and Orings
- new #26 orings
- K&N lunchbox
1.) My next task before my new things arrive, is to get one of the pilot screws out. One came out real easy, but the other wont budge. I'm going to try to get on it hard and get it out. I hope I dont have to drill that hard steel screw out of an aluminum housing. Sounds like a recipe for distaster. Any one have any good ideas for this?
2.) I am wondering about lubrication of the seals/anything else in the carb. What all do I lube and what should I use?
3.) Another concern I have is balancing the carbs. I would like to do it with the carbs off of the bike. Somone posted a technique on how to do this: "i use the 4 small holes at the bottom of the butterflies as reference points. you can adjust the position of the butterflies using the air mixture screw that links the two together. simply open and shut the spring side and adjust so that both butterflies have the same rate of travel and position. works like a charm every time..."
Is this a pretty good way to do it, or should I do it with the carbs on the bike?
4.) How do I know how many shims/what size I should put on my jet needle?
5.) How snug should I make the pilot/main jets when tightening them?
6.) Setting the pilot screws. I know a good starting point is 3 turns out from fully closed. How do I know when/how to adjust them from there once the carbs are back on the bike? Do you just adjust the pilot on one of the carbs, then make the other carb the same?
7.) Any tips on what I should be looking for when I start my bike for the first time with rebuilt carbs?
I just picked up my new GS last Sunday and still havent got a real ride yet with her running right. I'm hoping I can do everything right the first time so I can throw the carbs in, make some adjustments, and ride finally.
Nobody? :dunno_white:
As far a lubing all the screws and seal, use 2 cycle oil for that.
that is all I can safely say works, becasue I read it here somewhere, and it does work better than not putting anything on.
good luck on the rest of your re-build.
ed
140 mains ... WTH are you doing ??
Anyway, Drill it, its brass not steel in cast aluminum. I have been able to get them out with leftie drills with alarming success rates (try 100%) ... so I am begining to think they were meant to be drilled with left.
If you're worried, I'll drill it for $5, and I'll jet it for $45 parts and labor ... as my post says.
Cool.
Buddha.
QuoteAs far a lubing all the screws and seal, use 2 cycle oil for that.
that is all I can safely say works, becasue I read it here somewhere, and it does work better than not putting anything on.
good luck on the rest of your re-build.
ed
Thanks. I'll have to snag some from my buddy with a 2-stroke sled.
Quote from: The Buddha on May 17, 2008, 07:16:33 AM
140 mains ... WTH are you doing ??
Anyway, Drill it, its brass not steel in cast aluminum. I have been able to get them out with leftie drills with alarming success rates (try 100%) ... so I am begining to think they were meant to be drilled with left.
If you're worried, I'll drill it for $5, and I'll jet it for $45 parts and labor ... as my post says.
Cool.
Buddha.
All that I'm doing is the K&N lunch box with stock exhaust. The jetting matrix on the wiki (http://cgi.stanford.edu/~sanjayd/gs500/Upgrades/Rejetting), says a 140 main with the lunch box and stock exhaust. Should I be jetting it smaller?
What is this talk I've been reading about lefty drills? Is it a drill bit made to cut while spinning to the left rather than the right? Or are you talking about an easy out.screw extractor? Thats what I had planned on using. I didn't know the pilot screw was brass, that should make things easier. I've done a lot of screw extractions, but with much bigger screws, so this one shouldn't be too bad.
The engine can become touchy running just a lunch box with stock exhaust.You're bringing in all this fuel and air but the restrictive stock exhaust can't pass it all out.Try 135/40 and 1 washer under the needles,2.5 turns out on the mix screws.
Don't be afraid to soak your o-rings in oil too. For me that's the only way they would fit.
Stock exhaust and K&N OK try 140 but My thought is that its larger ... maybe 145, but hey you got the 140's so run it, post here and go from there. Pipe and stock is ~1 main size IMHO.
Yea leftie drills ... harbor freight and what not have them, they are drills, you out them in the reverse position on your drill and drill away. The thing will catch and unscrew the bolt/pilot jet.
Cool.
Buddha.