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More problems.

  • Thread starter Thread starter Anonymous
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Anonymous

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Ok, so I got the studs in the oil filter cover, new gasket and acorn nuts on and everything worked, no spewing oil, no explosions, nothing. Took the bike for a ride up the road, and she ran out of gas, so I walked back home(about 2km), long story short, got her filled up and idling. She wasn't idling right, low idle and my dad who dropped me off noticed gas leaking from the right cylinder where the exhaust joins. Took off and the bike had less power than normal. I figured, not firing on one cylinder, got home and touched the pipes, left was hot, right was cool enough to hold. I'm sure that both cylinders were firing before she ran out of gas, but the right one isn't now. It has a spark, from what I can tell, it has compression, and it has fuel. What's going on?

(I had the right side clutch cover etc. off to check the plates a week ago, could I have messed up the timing?)
 
Timing NO You probably got some junk from the bottom of the tank into the carbs and will have to remove them and clean them. You should never run a tank dry in your bike or your car
 
carbs eh? That doesn't make sense to me, becuase it's getting fuel, it's leaking out the exhaust port and at the end of the muffler, is it just not getting enough?

I of course did not mean to run the tank empty, if I did I would have done it closer to home :oops:

So I should pull the carbs and give them a good cleaning? Any other suggestions out there? I'll do that tomorrow, I have a chem exam in four hours so today's out.
 
LEAKING OUT THE EX PORT The cylinder is flooding, plug is probably fouled too which is why it won't fire, Clean the carbs and plug
 
Thanks, the plug was fouled when I took it out the other day(yesterday I guess it was). Can't wait to dive in to those carbs, says me semi-sarcastically. I actually should have done it while I was waiting for parts, but did not. Can a good job be done without replacing all the rubber bits? I really don't want to have to go hunting for a set, the way other parts have gone, it could be pretty hard. Unless the carbs stayed the same on the 450, up until they stopped making 'em. Any ideas on that? Thanks again Lynn,
 
Barry you shouldnt have to , BUT if the bike is flooding on one side then it is very possible you need to at least replace some o-rings etc on theat side
Dink
 
Thanks Dink, any idea about the size of the carbs and matching with the 450's?
 
If your carbs look like the ones in the carb cleanup series Robert Barr's o-rings will work. I've used them in both of my bikes.

Steve
 
Thanks guys, I'll look at the carb cleaning thing again once I've got my carbs in my hands and if they're the same I'll contact Robert Barr. Can't wait til the bike's ready. Oh and Steve, I had my front wheel up a little bit before I realized the cylinder was dead. So if the front can come up on one, then with both firing I should be able to wheelie a little bit. So get out on betty and start reving buddy.
 
The best bet would be the set of O rings from Robert www.cycleOrings.com ?? You will have two sets of O rings If you have big auto supply Take the old O rings down and try to match them up. Most parts stores have a big box of assorted sizes.
 
I've been fooling around with my carbs over the past week and I was able to spin the rear once leaving the beer store and I got up to 160 today. :) No wheelies yet, but Betty did leave the ground a few times. Now I have to wash the rear shock oil off of the back of the bike. :roll:

Steve
 
Alright, so I was looking at the Carb Series again, before I dive into mine tomorrow, and I see that the float bowl gasket is carefully removed, implying that it's reused. Is that correct? I was also told the the clutch cover gasket was reusable, of course, mine was not as it was stuck to different sides, anyways, is that gasket reusable? If I do manage to wreck it, and I will, gauranteed, is that strictly an OEM part? Or do you think an aftermarket company would do it as well. This brings me back to, do the 400/450 carbs match? Because the 78-79 GS400 and my 81 will not likely match will they? Thanks once again all,
 
They are totally different carbs, they made a big switch between those years. With patients the gaskets can be saved. I haven't had any problems disassembling 6 carbs so far. They may stick to one side or the other but just ignore that until setting the float heights.

Steve
 
Hey Steve, you meant that there was a difference between 79 and 81 right? Is there a difference between 400 and 450 models of the same year? Or 81 400 and up to 85 450? Thanks,
 
I've never seen one but the non-E 400s, 425s, and 450s have different cylinder heads. Even if the carbs do bolt on they will probably have different jets inside. The rest of the bikes are very similar but wheel sizes and styles do vary. If the body work looks the same it probably is. I've seen pictures 87s 450s with the same same body work as my 82 400.

Steve
 
Ok, carbs yanked, carbs cleaned, carbs replaced(not easily) and oil changed(full of gas, again) and the bike started up. Still not firing on the right cylinder, so it looks like I get to start troubleshooting the ignition system, yippee! Oh to have money to buy a perfectly running bike with a warrantee......but alas, I have my GS, with no warrantee, but it does run well when it runs, now if only I could get it to that stage :( I'll keep you all updated, let me know if anything crosses any of your brilliant minds that I should try/look for. Thanks all,
 
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