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Fire, Fire, Fire.. hehe(not)

  • Thread starter Thread starter havoc
  • Start date Start date
H

havoc

Guest
Ok, been plowing away on the 80, 850L project. Got the engine in the frame a few weeks back. I've got a G model exhaust mounted on her and everything seemed fine, until...

She starts and runs; but, she has fuel dripping from the exhaust at the front of the head. I know this means I'm going to rebuild the petcock and check floats. It also means the pipes have to come back off. But, any pointers on the remount to avoid this the next time around. I've never mounted an exhaust before; so, I wasn't quite expecting the leak. And I have to say, that fire does tend to create a rather stark sense of urgency about the thing.. lol
 
I've never heard of fuel leaking out the exhaust. Are you sure? It's possible for a leaking petcock to fill up the cylinders with gas but the bike typically won't start if there is that much gas in there. In either case you shouldn't have to take the exhaust back off. Just let the gas (assuming it is) evaporate off while you dig in and fix the petcock and clean the carbs.
 
Please calrify: Fuel leaking out of exhaust pipe.
FUEL? leaking out of the exhaust in front of engine?
Fuel leaking out of the EXHAUST PIPE? in front of engine?
ANd it runs?
 
I was thinking the same thing earlier but did not respond. Unless the bikes running on 2 or 3 cylinders and flooding out the other 1 or 2 I would suspect a stuck float valve and needle or if it is the #2 cylinder the petcock is suspect.
 
Redman said:
Please calrify: Fuel leaking out of exhaust pipe.
FUEL? leaking out of the exhaust in front of engine?
Fuel leaking out of the EXHAUST PIPE? in front of engine?
ANd it runs?
Click to expand...

It runs. the leak builds up right under the exhaust port for cylinder 2. So it looks as though it's coming from there whether it is or not. And the bike is running. But, it's only running on the two outside cylinders, of the inner two, 2 stays cold and 3 fires occasionally. Pipe 3 is warm to touch; but not "hot".
 
chef1366 said:
I was thinking the same thing earlier but did not respond. Unless the bikes running on 2 or 3 cylinders and flooding out the other 1 or 2 I would suspect a stuck float valve and needle or if it is the #2 cylinder the petcock is suspect.
Click to expand...

See, this is why I like you folks.. I've seen fuel backup into the airbox (which isn't happening). I haven't seen it come pouring down the front of the bike. Ok, pouring is probably an exaggeration; but, when it runs down and erupts into flames, it gets the blood goin.. ;) So, the collective opinion seems to be, leave the pipes alone and work on the fuel flow.

Thanks guys!!!!
 
rustybronco said:
Fuel tank leaks?
Click to expand...

Petcock is fixed. That has stopped the major leak; but, it looks like the carbs definitely need work. She runs and she now idles at 1100rpm; but, she doesn't want to rev past 3k without bogging and nearly dying. Guess I know what my next day off will consist of now..
 
Steve said:
Any chance you are trying this without an airbox installed? It won't run well without one. 8-[


.
Click to expand...

You got it. Been having problems getting an L model airbox to seal to a G model carb rack. Fought and finally got it on; but, it appears the boots slipped off again... Ready to chuck the bloody airbox and go to pods. And I don't like the look of pods.
 
Hunt down a G airbox and leave the pods to those who like to mod and know what they're doing.
 
Dave8338 said:
Hunt down a G airbox and leave the pods to those who like to mod and know what they're doing.
Click to expand...

So the fact that I've got pods on my bike may actually make people think I know what I'm doing? Cool!

Actually, since the bike came with a V&H and no airbox, I figured WTH I'm going to have to rejet anyway, might as well throw the pods on it. I personally like the look, but to each their own.
 
chef1366 said:
I like my pods and the rejet wasn't that difficult.
Click to expand...

I agree, pods look great! I'm just trying to head off the next set of questions that usually go like this:

"Put the pods on but now, I seem to have a hesitation at midrange and the bike has lost most of its' pull. Do you think I may need to rejet? If so, who / what would you recommend? Where can I find them? I'm not real good with the mechanics thing and have a very limited selection of tools, with no place to work on the bike. What are plug chops? Where do all these little hoses go. Do you think that I should get a book? Where? Is there anyone out there in the _______area that can give me a hand!" :?
 
Dave8338 said:
I agree, pods look great! I'm just trying to head off the next set of questions that usually go like this:

"Put the pods on but now, I seem to have a hesitation at midrange and the bike has lost most of its' pull. Do you think I may need to rejet? If so, who / what would you recommend? Where can I find them? I'm not real good with the mechanics thing and have a very limited selection of tools, with no place to work on the bike. What are plug chops? Where do all these little hoses go. Do you think that I should get a book? Where? Is there anyone out there in the _______area that can give me a hand!" :?
Click to expand...
Gotcha!!!!!
 
Ok, Airbox issue is finally dealt with. It's now mounting properly. I had to change out the carb rack to get the job done. The previous owner had apparently stripped out the
holes for the mounts to the gang plate and then JB welded
the gangplate on upside down causing the carbs to ride directly on the tensioner and forcing a higher attitude on the rear of the carbs themselves. Having a spare rack of
carbs came in quite handy.

I rebuilt them yesterday afternoon, installed them and now the bike won't start at all. Haven't done much troubleshooting beyond that point yet. There's an inline filter on the fuel supply that I'm thinking is gonna come off just to take it out of the equation for now. I don't know what type of filter it is; so, not knowing, better safe than sorry. Got a few hours before I have to go in to work; so, I'm off to do some investigating. Will report back with updates later.
 
Bypassed the filter. Engine is firing on all fours but she's acting starved still. Spark seemed good, so I hit the airbox with Heat just to see if spark is the issue - it isn't. A little heat and she sound just like she should. Pinched the fuel line with no filter installed - nearly bone dry. So I still have a petcock issue after rebuild. Ready to shred the frakin petcock and bypass it. Someone might think that thing is brilliantly designed. Personally, I'd like to meet the guy that designed it and punch him in the face right now. At any rate, the only thing standing between me and riding that bike tonight is the petcock. So, I'm outty.
 
I don't think it's a brilliant design, personally any petcock that I can't rebuild with 100% confidence it will work is crap. Only about 15% of the people here that have tried to rebuild their petcocks have met with success. However, the point was a new one would work and be a direct bolt-in.

If my petcock goes out I'm going with the design posted by another member: manual petcock with an electric normally-off valve solenoid. That way I don't have to worry about shutting it off, vacuum leaks, hydrolocking, etc.

The best setup I've ever seen on a bike was my Shadow's electric fuel pump and seperate reserve tank. Sure, it's more stuff bolted to the bike but it never gave me a hiccup.

The Pingel is pretty much the only other option, just don't forget to turn it off or you're going to become an expert at changing out your starter clutch bolts and/or the clutch itself.
 
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