So here's the deal:
I recently got a 1983 Magna V45 (750). I started doing some routine maintenance, and when I raised the gas tank to get at the air filter, the gas hose under the tank broke (was VERY brittle). So I ordered the part. While I waited for the part, I decided to creme my tank. Got the tank done, the hose came, I reinstalled everything, filled with gas.....no start.
Assuming I had gunked up my fuel system somewhere, I started checking fuel lines. Everything checked out. The fuel pump is pumping a little weak, so it's either almost dead or there's blockage between the petcock and the carbs somewhere, but gas is definitely getting to the carbs. I attempted to get her started by spraying carb cleaner into the carbs while trying to start, with no results.
I then moved to check the spark plugs, and was surprised that I didn't get a spark out of any of them. The bike is turning over, but no spark (the battery is good). I previously also checked to make sure the cylinders were getting compression, and definitely smelled gas from each cylinder when I was checking.
I need some help figuring out where to start narrowing down the spark plug issue. I was thinking maybe a coil, but it's all 4 not firing (not just 1&3 or 2&4). How likely is it that they would likely both go bad at the same time? Electrics is definitely not my strong suit, so I'll take any tips, no matter how simple.
Some other quick details:
I replaced the spark plugs at the same time I broke the fuel line, so the bike hasn't started since I put the new plugs in. The plugs came from a shop that specializes in Honda bikes, and I gapped them to .08mm (according to the manual).
I changed the oil, oil filter, final gear oil and radiator fluid also.
The fuel lines are all clear enough, and the fuel filter is not unusually gunked up.
The bike was running prior to this work, and the gas dumping onto the ground:P
Thanks in advance all. I really appreciate it.
Check to make sure you didn't accidently disconnect your CDI box which is right by your fuel pump. (black square) Also double check that you have not loose wiring or missed a ground somewhere. Doublecheck that your coils are getting power using a volt meter at the coil connectors. Thats a good starting point other than that you could of had a failure of the sensor that tells the coils to fire.
Funny thing....
One side of the spark plug gapper is in inches, the other side is in millimeters. Guess which side I used? I though to myself while I was gapping: "Dam, .8 inches is a HUGE gap."
I'm going to go hit myself with a hammer several times and put some plugs in. Dough!!!
Those are the best fixes....when nothing was wrong.
Welcome to the DUHHHH club :lol:
gah......got her running again, but she keeps dieing. I put brand new plugs in (gapped correctly :P ), and it will run around the block, but then start to die when I idle.
Anywho, gonna get a buddy to come help me that knows more about these things than me. But any thoughts?
Slow speed jets clogged. I would get some Seafoam and double up what the can suggests and by the end of the can should see a noticeable difference.
Or yank the carbs and clean the slow speed jets.
for the number of times I have read about seafoam and all the different uses for it, I'm surprised that it hasn't been included in the FAQ's :P seriously though, I love the stuff, it even tastes good too! :lol:
Quote from: Jester on September 06, 2008, 10:11:23 PM
for the number of times I have read about seafoam and all the different uses for it, I'm surprised that it hasn't been included in the FAQ's
I don't mind including this, prefer to start a FAQ HELP or Problem Solvers and include issues we run across.