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Old 04-15-2009, 06:19 PM   #1
Seight311
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Default 1983 V45 Magna fuel rail leak

(Im car repair familiar, relatively new to bikes so bare with me)

I got a project from a family member to get this running for them. Was told it only needed a battery. Got a battery put in, and it took some fiddling but it finally fired up. I noticed some valves on the carbs to drain, and it was a good thing I did it because they all were full of gunk.

Now theres is a very significant leak when running. I would say in 30 seconds it would fill an 8 oz cup. I pin pointed it to a T line that appears to turn into a fuel rail. It freely rotates, which im not sure if its supposed to.

So is this supposed to be locked in, are there O-Rings that are just bad... Im sure I just need to take it apart and figure it out, but if I had a direction to look, or the name of the part... Any direction is appreciated.

Last edited by Seight311 : 04-15-2009 at 06:22 PM.
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Old 04-15-2009, 06:29 PM   #2
seruzawa
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Where on the bike is this fuel rail?
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Old 04-15-2009, 07:40 PM   #3
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Runs right in the middle. Connects to each of the 4 carbs. And on the left side (When sitting on the bike) is where the fuel line runs into this rail, from the tank.
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Old 04-15-2009, 08:16 PM   #4
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Since you apparently don't have a manual you can go to Bike Bandit and look up the picture of the assemblies and see if that tube has o rings. If so they need to be replaced. You'll need a manual to disassemble the bike enough to get the carbs out. But be warned. I owned an '84 Magna for a while and I can tell you that it is undoubtedly the most difficult motorcycle to work on I have ever encountered.

You will need to lift the fuel tank and remove the air filter and manifolds. I don't remember if you have to remove the radiator. I think you can do it without removing the front cylinder head.The manual will tell you which side to remove the carbs from. Then the carb assembly will have to be disassembled. Plan on a couple days to do such a normally simple job. Honda designed this bike so that in order to do any one task you have to 8 or 9 others first. To even change the fuel filter you have to remove the rear wheel.
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Old 04-15-2009, 08:24 PM   #5
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Quote:
Originally Posted by seruzawa View Post
Since you apparently don't have a manual you can go to Bike Bandit and look up the picture of the assemblies and see if that tube has o rings. If so they need to be replaced. You'll need a manual to disassemble the bike enough to get the carbs out. But be warned. I owned an '84 Magna for a while and I can tell you that it is undoubtedly the most difficult motorcycle to work on I have ever encountered.

You will need to lift the fuel tank and remove the air filter and manifolds. I don't remember if you have to remove the radiator. I think you can do it without removing the front cylinder head.The manual will tell you which side to remove the carbs from. Then the carb assembly will have to be disassembled. Plan on a couple days to do such a normally simple job. Honda designed this bike so that in order to do any one task you have to 8 or 9 others first. To even change the fuel filter you have to remove the rear wheel.
All of that is a Bald-Faced Lie - I have it on Good Authority that the V-4 engine in the Magna was quite possibly designed by God Himself.................

Don't listen to seruzawa: Merely "laying on hands" and sacrificing a lamb or dove will heal this moto and expell its fuelrail Demons.
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Old 04-16-2009, 05:52 AM   #6
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Also, the float valves are probably shot, allowing fuel to overflow the bowls. Carb dissasembly is called for. Good luck!
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