Firing Order?

[Rob (from Hoosierville)]

Greeting from Hoosierville,

Anyone know the particulars on the firing order for the ST1300? I'm curious as to the firing sequence as well as the timing of power strokes versus the rotation of the crank.

Thanks in advance for any responses.

 

[BigTom]

Hi Rob

I waited a little, waiting for a 1300 owner. I need to keep moving, so I'll give you the ST1100 version

Firing order:
1-4-3-2

Crank Timing: Honda 360 degree, relative to TDC:
1-90, 4-270, 3-90, 2-270

I call the crank timing: (720 degrees of crank rotation per 4 stroke engine)
1-90, 4-270, 3-450, 2-630

Precisely square crank timing. It is the dampners that take care of the secondary vibration, rather than offset crank timing. My V-4 Yamaha had offset crank timing, they called it 1-0, 4-270, 3-360, 2-630.

Hope this helps

 

[tomm]

Which cylinders are #1, #2, #3 and #4?...................tom

 

[Fred D]

Tomm and Rob, those are good questions, which I take as showing you both have a serious interest in becoming better acquainted with your bike. If so, you really should get a service manual....

 

[Mellow]

Rob, since you have an '05 you probably had HRCA and as such you are entitled to log into their Clubhouse and select a publication to view. You should also be able to select the service manual from the listed publications - only one per membership.

From there you should be able to find it in case you don't get the answer, I'm not sure if the ST11 and ST13 share the same firing order.

 

[BigTom]

Mellow

I'm pretty darn sure they share the firing order, the piston # and placement is the same, no reason to change. Square crank timimng and this firing order go together for least vibration.

Tomm

If you can see a motor, generally, the most forward cylinder is #1. In this case, the numbering contiues in sequence. LF is #1, RF #2, LR #3, RR #4. It sometimes helps to have the pan off to see exactly how this works.

 

[Fred D]

Mellow

I'm pretty darn sure they share the firing order, the piston # and placement is the same, no reason to change. Square crank timimng and this firing order go together for least vibration.

snip

Piston numbering is just the opposite on the 1100s. The1100s start the numbering from the right bank, whereas the 1300s start from the left bank....(see the picture of a 1300 in my previous post)

#4 on an 1100 is the aft cylinder on the left side, #4 on the 1300 is the aft cylinder on the right side .

If nothing else, this discussion indicates how critical it is to have the service manual if you're going to be working on your bike.

 

[BigTom]

:

I stand corrected. I did clearly state I was giving the ST 1100 stuff, right out of the service manual. Then I used Fred's visual for my explination...not so good. Mea Culpa

Now my question. Is the crank timing still square on the ST1300? I mean are the firing strokes 180 degrees apart? I know they changed the dampning system on the ST1300, did they do that to use offset timing? It'd change the vibration pattern.

 

[Fred D]

:

snip

Now my question. Is the crank timing still square on the ST1300? I mean are the firing strokes 180 degrees apart? I know they changed the dampning system on the ST1300, did they do that to use offset timing? It'd change the vibration pattern.

Yes, see attached....(if it wasn't "Yuma hot" here, I could be out riding or farkle-ing and not setting in front of the computer )

 

[Rob (from Hoosierville)]

Thanks for the responses.

Fred - I may get a manual. I bought one for my GL1800 though and I barely used it.

Mellow - Good tip on the HRCA resource. I've not logged on to the site for quite a while.

To all - Not planning on doing any engine work at this point (ever hopefully). I'd just been doing some reading on power stroke timing variations used on racing bikes and was curious how the ST was set up.

 

[ST1300 Alicia]

Rob, since you have an '05 you probably had HRCA and as such you are entitled to log into their Clubhouse and select a publication to view. You should also be able to select the service manual from the listed publications - only one per membership.

From there you should be able to find it in case you don't get the answer, I'm not sure if the ST11 and ST13 share the same firing order.

I think you only get access to the general repair manual and not to specific model repair manual with the FREE First Year Membership in HRCA.

 

[wjbertrand]

:

I stand corrected. I did clearly state I was giving the ST 1100 stuff, right out of the service manual. Then I used Fred's visual for my explination...not so good. Mea Culpa

Now my question. Is the crank timing still square on the ST1300? I mean are the firing strokes 180 degrees apart? I know they changed the dampning system on the ST1300, did they do that to use offset timing? It'd change the vibration pattern.

The crank throws are the same for each bike, I.e. both pistons in each bank (left vs. right) rise and fall together, like a 360 twin. Their firing sequence is phased oppositely though so that when cylinder #1 is compressing a fresh charge, it's paired one in the same bank or side (cylinder #3) is on it's exhaust stroke instead. So yes the firing strokes are 180 degrees apart but engines are usually described by their crankshaft configuration and from that perspective the ST1100 and ST1300 are both 360 degree engines.