I just picked up a 1990 600, and it is running rough/misfiring. Especially at idle and in the lower RPMs, say under 4k or so. It surges/sputters/wants to die. It just sounds more like a harley than a smooth inline 4.

Anyway, I'm assuming its a carburetor issue, but when doing the spark plugs yesterday I came across a potential problem.

The Haynes manual states cylinder identification as 1-2-3-4, left to right, with number 1 being at the alternator end. I understand this to mean that cylinder 1 is on the side with the muffler, and cylinder 4 is on the side with the kickstand. Stated in a different way, when sitting on the bike, cylinder 4 is on your far left side, cylinder 1 is on your far right side.

Is this interpretation correct?

The reason I ask is because on my bike, they are reversed. The plug wires are labeled. Number 4 is on the right (muffler side), and number 1 is on the left(kickstand side).

Can someone look at their bike and tell me how its supposed to be.

Thanks in advance.

 

Its correct 1-2-3-4 left to right. your muffler is on the RIGHT side of your bike. however youre definetly not running on all 4 cylinders. What did your plugs look like?

 

Why does the Haynes state it as 1-2-3-4 with number 1 at the alternator side?The alternator is on the RIGHT side, same side as the muffler, correct?


Plugs didn't look too bad. Gaps were fine. Decent brown color. Nothing out of the ordinary on any of them that I could tell.

 

download the real manual. http://www.cbrextreme.com/downloads/...manual-54.html

or here http://www.carlsalter.com/motorcycle-manuals.asp

KongBastard

 

The haynes manual works perfectly fine. There is no "Alternator" on the 600. You have the Stator on the right, and the Pulsar Coils on the left on the crank. Your firing order is 1-2-3-4 From the left side to the right.

 

Haynes manual is correct, just had to figure this out myself yesterday because I put all the plug wires on wrong. Sitting on the bike your alternator is on the left side, and the clutch is on the right side (you can see your clutch cable on the top of the case). Cylinder ident is 1-2-3-4. Your wires are numbered, put them in this order. Ignore firing order (1-2-4-3). Just make sure they are all seated pressed from the center of the plug it should click down.

I had mine all messed up, and it wouldnt run at all, then I put my wires in by firing order. Which it would run but back fired every few seconds.

 

OK so if im reading what you guys are saying correctly then IGNORE the 1-2-4-3 firing order and just keep the spark plug wires in the correct numerical order from left to right (1-2-3-4) . I'm confused as to why the manual suggest 1-2-4-3 just like the rest of you guy. lol but my bike isnt starting either way right now lol....im still thinking its a spark problem somewhere though

 

Is it 1 2 3 4 from left to right on the Coils as well? Which coil / what side of coil does the spark plug wire 1 connect to? how about 2,3 and 4?