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  #1 (permalink)  
Old 10-24-2011, 05:43 PM
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1983 yamaha maxim firing order?

Anyone help me out here... when sitting on the bike is #1 the far left cylinder? And what order shoud the wires be in from there? My wires have tags that are numbered 1-4 but im not sure what order to put them on. I have read some conflicting stuff on Google... bike runs with them in 1-2-3-4 order but pops out of the carbs and sometimes the exhaust. Just seems like something Is off and it wont run right...
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  #2 (permalink)  
Old 10-29-2011, 07:22 PM
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The XJ uses a wasted spark system. Both cylinders on the coil get spark at the same time. one on ignition, one on exhaust.

The coils are set up as follows
Left coil, Orange lead wire: Cylinders 1&4 (outside cylinders)
Right coil, Gray lead wire: Cylinders 2&3 (inside cylinders)

The cylinders are number from left to right 1-4.
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  #3 (permalink)  
Old 11-08-2011, 07:41 AM
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Man, I don't know my firing order. How can I tell engine wise the sequence?

Begin at the far left cylinder; watch the intake valve go down and begin to come up. Your next eye contact after the in-valve begins to move back up, you look at the timing marks. Do you see 1-4 are the next lines to line up? You now found #1 cylinder fire.

turn the crank, the engine will expose the next line of fire is going to be #2. You watch that intake and did the 2-3 timing marks come in the window for that cylinder? Watch now. Here comes #4's intake is the next move. Why? Because the 1-4 is the next to come around, so you now know an engine firing sequence will be, 1-2-4-3.

It is not confusing, if you now look at a V-8, or V-10, know only one cylinder is going to fire and that will follow a pattern or sequence; go watch a V-8 engine cycle through one 360 and see how many valves are doing how many things within those degrees and you'll have any engine firing sequence figured out... Let it sink in.
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