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Author Topic: Small Exhaust leak? How can i fix it?  (Read 6451 times)

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Offline Braap257

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Re: Small Exhaust leak? How can i fix it?
« Reply #15 on: August 02, 2010, 09:32:54 AM »
So is it possible the carb just needs some adjustment? Cuz as i said before i haven't really been able to open the bike up or take it anywhere yet and I start it up every other day and its not fouling the plug.
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Offline eprovenzano

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Re: Small Exhaust leak? How can i fix it?
« Reply #16 on: August 02, 2010, 10:28:10 AM »
Yes the bike is running rich, but there is still an exhaust leak that should be addressed.  As far as adjusting your jetting, you will need to pull the carb, remove the jets, and including the needle jet.  Once you have all the jets out, please write them down...  Many do not, and have no idea as to what their running.  Once you have a list of the jetting, we can help you with a leaner set-up.  Most likely your fix will be changing the needle clip one position .

Pull the carb, give it a proper cleaning, and write down current jetting.  While you're there, change out the rubber on the exhaust with a peice of a radiator hose and give everything a good cleaning.  Come on back with your current jetting specs and we'll get you straightened out.
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Offline Coop

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Re: Small Exhaust leak? How can i fix it?
« Reply #17 on: August 02, 2010, 10:38:10 AM »
If you give us an idea of where you are located, maybe there will be a member close to help out. My garage and help is always available to anyone in SW PA and I am sure most members feel the same way.
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- Mike - Don't take life so seriously, nobody gets out alive.

Offline TMKIWI

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Re: Small Exhaust leak? How can i fix it?
« Reply #18 on: August 02, 2010, 01:29:35 PM »
Get rid of the old fuel first.
NEVER run your bike on old fuel. Especialy if you dont know how old it is.
Throw some new fuel in it and try. You might be suprised with how well it runs.
If not pull the jets as explained above.
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Offline Charles Owens

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Re: Small Exhaust leak? How can i fix it?
« Reply #19 on: August 02, 2010, 01:52:32 PM »
Yeah, before you do anything replace the plug, drain the fuel, clean the in tank/petcock filter, give the carb a good cleaning.
Otherwise you will be tuning in circles.
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Offline Braap257

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Re: Small Exhaust leak? How can i fix it?
« Reply #20 on: August 02, 2010, 02:09:33 PM »
Quote from: Coop on August 02, 2010, 10:38:10 AM
If you give us an idea of where you are located, maybe there will be a member close to help out. My garage and help is always available to anyone in SW PA and I am sure most members feel the same way.

I live in Lakeland Florida.
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Offline Braap257

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Re: Small Exhaust leak? How can i fix it?
« Reply #21 on: August 02, 2010, 02:14:18 PM »
I will take all of these into consideration. As I said before I just picked up the bike "Haven't even got a chance to ride it. I'm still waiting for my gear to come in." The guy said the bike was jetted correctly for the pipe and the that the fuel was probably stale. And that once I replaced the fuel with fresh stuff it will run right. It seems to run fine to me. Just seems to run rich..  I would like to put some fresh gas and maybe a new plug in it before i pull the carby when it may not need it.
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Offline Charles Owens

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Re: Small Exhaust leak? How can i fix it?
« Reply #22 on: August 02, 2010, 02:17:12 PM »
A lot of carbs may not "need" it but just a simple cleaning can make a huge difference. Especially when it has been sitting. :)
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Offline TMKIWI

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Re: Small Exhaust leak? How can i fix it?
« Reply #23 on: August 02, 2010, 05:33:17 PM »
Some oils will seperate from the fuel when left for along time.
If the fuel is stale the bike is probably running on a "richer" fuel/oil mix.
Drain it and change it first. Throw in a new plug for good measure.
You will need to take the bike on a decent run to clean out the engine.

You should be good to go from then on. :D
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Offline JETZcorp

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Re: Small Exhaust leak? How can i fix it?
« Reply #24 on: August 02, 2010, 08:27:23 PM »
So here's a question.  After the oil and gas have separated, is it possible to re-mix them by shaking the bike (and therefore the tank) or has something happened chemically and the two are forevermore divorced?
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Is this Maico a 440 or only a 400?  Well in all the confusion, I forgot myself.
But considering this is a 1978 Magnum, the best-handling bike in the world, you have to ask yourself one question.
Do you feel lucky, punk?

Offline TMKIWI

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Re: Small Exhaust leak? How can i fix it?
« Reply #25 on: August 02, 2010, 09:39:22 PM »
No point Jetz.
If the fuel oil has seperated the octane of the fuel will be so low its not worth using.
2 strokes will not get away with old fuel as well as 4 strokes will.
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Offline JETZcorp

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Re: Small Exhaust leak? How can i fix it?
« Reply #26 on: August 02, 2010, 09:45:35 PM »
So how long does it take to reach that point?  When I put my bikes away between rides there's always a little left in the tank, and there's often some that sits in the cans for maybe two or three weeks between rides.  The stuff is so expensive I'd hate to have to get rid of it... how in the hell does one even dispose of unwanted gasoline anyway?  I can't imagine the city authorities would be too happy if you poured it down the drain or onto the grass.
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Is this Maico a 440 or only a 400?  Well in all the confusion, I forgot myself.
But considering this is a 1978 Magnum, the best-handling bike in the world, you have to ask yourself one question.
Do you feel lucky, punk?

Offline TMKIWI

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Re: Small Exhaust leak? How can i fix it?
« Reply #27 on: August 02, 2010, 09:55:40 PM »
I throw my fuel away ( I mean dispose if it in the approved manner) after 2 months.
As long as i havnt mixed it.
It will go off quicker if mixed.
I only mix what i need in the short term. But i use avgas which last longer then pump.
Modern fuel does not keep as long as it once did.
Keep it in a metal container because believe it or not fuel goes of in plastic. Plastic breaths. Thats why you cant paint a plastic tank.
2-3 weeks between rides is not a problem.
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If you don't fall off you are not going hard enough
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