So, Dave came up and poked around it some, and he's baffled, too. It'll start, but it doesn't respond well to throttle and dies almost immediately. Dave thought it was too rich, so we pulled the air filter. It ran a touch longer before dying, methinks. It looks like it's backfiring from the carbs - you get a little *pff* of a pop and the carbs jerk.
Specs...
'91 GS500
Stock airbox
Stock filter
Wileyco, unrestricted
Mains - up one size
It was running before with K&N, exhaust, many exhaust leaks, and 150 mains. I jetted it down, put in the stock aribox, and took care of all of the leaks except for a very small one at the flange. I checked the float levels, and the right was fine, but the left kept going out of whack, so I replaced the needle and seat, and it's at level now (all by the transparent-tube method).
Any ideas? Dave says it needs beer. He's beta-testing the beer on himself.
If you're sure it's not a carb issue, check for intake leaks after the carbs.
If you have been having carb issues, your spark plugs may be fouled..
I would go with fresh plugs (with correct gap of course) before I did anything else to the carbs..
My Katana did exactly what your describing and when I dug into it I found my choke cable had broken and the bike was being choked all the time.
Yeah, the next two things I'm going to try are plugs and putting the pod back in (sequentially); I really hope I still have those plugs from my old GS lying around.
Toss the new NGK's you have and drop in champions ... 809's I believe ...
Cool.
Srinath.
Sounds to me like a possible vacuum leak :x
Did you do any shimming of the needles when you re-jetted?
My bike did the backfiring through the carbs bit initially after I rejetted, and re-shimming the needle (lowering it in the slide by 1mm or so) solved the problem.
How do the plugs look?
Spark issue....plugs, coils or wires.
any results yet on the beta testing of the beer? I'd like to be in on the beta as well... (I won't tell you how old I am, then you can't get in trouble for giving me beer :lol: )
Seeing as how the bike is intended for me, I think it's only fair that I should help out.
Therefore, I also volunteer to help test the beer.
Quote from: aaronstjSeeing as how the bike is intended for me
Whoa... so you mean I'll be the only nood left hanging around? Crap..
Yeah, one of these days I'll actually have a bike. I'll have to give up my record as "guy with the most posts whlie not owning a bike."
which would leave the title to me...actually, if I keep postwhoring pandy style, I'll pass you in a coupla days...
Hey now....I resemble that remark. :nana:
When we put the stock airbox back in, my baby G didn't want to run either...we put the K&N back in, and he was good to go again..... well....at least until his carbs got dirty, filthy... :(
heh... I'm just acknowledging that I learned from the best Pandy! :) :)
Quote from: NiceGuysFinishLastheh... I'm just acknowledging that I learned from the best Pandy! :) :)
You sweet talker! :kiss: :lol:
Quote from: pandyYou sweet talker!
so it's working? 8) ;)
rg, dont care what sinraith says never ever ever ever ever screw achampion sparkplug into anything but a dodge or lawnmower.use new ngk(or nd if ngk not available) champions have been known to screw aluminum threads out on there way (shortly after they foul) are you sure its hitting on both cylinders?ive had several gs's break one of the wires leading from the pickup coils(inside the fabric cover you can feel the break with a fingernail.if it is hitting on both disregard the latter.trust me on the plugs ive been a cycle wrench for 18 yrs.
Quote from: aaronstjYeah, one of these days I'll actually have a bike. I'll have to give up my record as "guy with the most posts whlie not owning a bike."
Bah! Not until I get my bike home this weekend you little shaZam!!
<------ Look at the POST COUNT.
I HOLD THE RECORD TILL NEXT WEEK.
Anyhow, I thought I told you to crawl under a rock and die the last time you disrespected my status as official "Highest posts without a bike guy".
:lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol:
Quote from: GeePBah! Not until I get my bike home this weekend you little shaZam!!
Anyhow, I thought I told you to crawl under a rock and die the last time you disrespected my status as official "Highest posts without a bike guy".
Hah.. OWNED!! And with this post, I put myself closer to taking the record from aaronstj, after he inherits it from GeeP
Ugh - I think I might have missed the sparkplugs for the trees. The NGKs they took out of my '04 F at the first service look great, so I'll try those once I'm done recharging the battery I drained.
Quote from: NiceGuysFinishLastso it's working? 8) ;)
Absolutely! :lol:
sweet! I RULE :bs: :thumb:
Quote from: Roadstergal
Specs...
'91 GS500
Stock airbox
Stock filter
Wileyco, unrestricted
Mains - up one size
Hmm, I see no mention of the pilot jets or mixture screw setting. There's no telling what a DIY tuner may have gotten into and these are the elements which would affect idle and off-idle most. Pilot jets should be the non-bleed type else it won't run right. :cheers:
I think the pilots are stock, but I should doublecheck. Mixture screw is three turns out.
Well, Dave beat at it for a while, and it still belched foamy gas after about 30sec. I pulled the carbs and checked the floats in a bucket of grotty water and tweaked the float height. No go. Then Srinath said the crankcase might be full of gassy oil - or oily gas - from the previous overflows, and the oil pump would be churning it all foamy... so we drained some awfully thin oil out (I think he'll be able to run his truck on it), refilled with new oil, and it ran all happily. Okedokee, good to have that taken care of.
Quote from: RoadstergalWell, Dave beat at it for a while, and it still belched foamy gas after about 30sec.
:o :? :lol: :lol: :lol:
This is worthy of Mae West! :lol: :lol: :lol:
I didn't really think about it that way.... :lol: :lol: :lol:
So, that thing is finally running?
Sweet! aaronstj can get a bike just in time for it to snow! :lol:
Quote from: RoadstergalWell, Dave beat at it for a while, and it still belched foamy gas after about 30sec. I pulled the carbs and checked the floats in a bucket of grotty water and tweaked the float height. No go. Then Srinath said the crankcase might be full of gassy oil - or oily gas - from the previous overflows, and the oil pump would be churning it all foamy... so we drained some awfully thin oil out (I think he'll be able to run his truck on it), refilled with new oil, and it ran all happily. Okedokee, good to have that taken care of.
OK so its fixed now ???
Anyway ... buy a used bike and I do these 3 things right before I even start it up. Carbs - open, clean, rejet (usually I over cook it and have to jet it down in the new bikes I buy, but a GS is on the nose usually), oil and filter - change, and Valves adjusted ... before that the bike doesn't even get cranked over. Whihc is one reason I prefer to buy it non running ... so you know you have to do these 3 ... and heck get a $$$ break for the trouble.
BTW Davipu said it just had gas to just above the F mark on dip stick ... that was enough to foam up and gush out your valve cover ... well I guess I never tried to lube the motor with gasoline ... so what do I know ...
Cool.
Srinath.
It's running.. I still need to do the forks and paint the thing, but they aren't the devil like carbs are.
Forks? What, new oil and seals?
I need to do something about mine... I'm bottoming out more and more every day... :oops:
Quote from: RVertigoForks? What, new oil and seals?
I need to do something about mine... I'm bottoming out more and more every day... :oops:
Lose weight? :dunno: :lol:
I think you'd bottom out these things...
The guy I got the bike from was about 250. I just think they're tired... So very tired.
Sweet, it's running. Sooo cloooose....
You're just gonna mess it up when you drop it... So, I say screw the new paint job... :lol:
Heheh. It's RG putting in the hard work, not me. She can paint it all she wants. :)
But... Don't you want it sooner, rather than later?
The paint job is the thing that will take the least amount of time. I won't ask the price I'm asking without a new chain and at least a better job than the matte black crap on it right now. I do have to take it for a spin this week to make sure it runs well throughout the range.
So there.
aaronstj,
good luck witht he new bike. Sounds like you are getting it from a reliable person, and I'm sure Roadstergal will do a bang up job on getting it road worthy. If I were you I wouldn't want to wait for a new paint because I'd be dieing to ride it. However, wait until you have all proper gear and it isn't freezing/wet outside. I'd probablly jump right on it and start riding as soon as I could get my hands on it, however, I'd be a shame if you crashed your new bike the first day you got it because you were trying to ride it in crappy conditions.
Quote from: aevans17however, I'd be a shame if you crashed your new bike the first day you got it because you were trying to ride it in crappy conditions.
But we'd all get one heck of a laugh out of it (provided he wasn't injured, of course) :P
Thank. I lucked out getting dibs on RG's bike. They're pretty rare here in Seattle for some reason, and so just get any GS is pretty awesome. And I'm confident she'll have it in proper order. And if not, I'll sic the forum on her.
I've been waiting for a long time, I can wait a little longer for paint. Plus, when you add it into the other stuff, I doubt it really adds much time. Plus, I love blue!
I'v got all my proper gear, except pants. That was the only thing they didn't require for the MSF course, so I didn't buy them. I need to get a good pair of overpants one of these days.
Hopefully the weather will clear for at least a couple days when I get her. :)
Srinath: it was a 5 qt oil pan that I drained the oily-gas into and it whouldn't hold another drop. i just couldn't see anything higher on the dip stick from it being so thin and the oil being relativly new.
Quote from: aaronstjPlus, I love blue!
Ohhhhhhh yeah. [/Shaft]
Quote from: davipuSrinath: it was a 5 qt oil pan that I drained the oily-gas into and it whouldn't hold another drop. i just couldn't see anything higher on the dip stick from it being so thin and the oil being relativly new.
Well I guess if you got the bottom ends of the rods hitting it ... it is going to fly around like a Cat 5 inside your motor and I guess come flying out the vent ... whoever ran the bike with gasoline in place of oil ... so No clue ... just a hypothesis ... :lol: Now the inside of the motor is really clean ... :mrgreen: ...
Cool.
Srinath.