Page 1 of 1
why a 1-2-4-3 firing order?
Posted: Tue Apr 09, 2013 6:17 pm
by ross46
This isn't a problem with my bike, just when changing my cam chain I noticed the cam lobes are a 1-2-4-3 firing order, what's the advantage just out of interest? Thanks
Re: why a 1-2-4-3 firing order?
Posted: Tue Apr 09, 2013 6:29 pm
by banner001
its to do with minimising engine vibration and overall crank balance.
Re: why a 1-2-4-3 firing order?
Posted: Tue Apr 09, 2013 6:36 pm
by CaNsA
And heat dissipation.
Think about it, if it went 1234 then the time for 1 to fire after 4 would be huge.
Re: why a 1-2-4-3 firing order?
Posted: Wed Apr 10, 2013 11:17 am
by ross46
Whole crank rotation, would then need a balancing shaft like on some thumpers, thanks was just on of those weird questions in my head, but why heat dissapation?
Re: why a 1-2-4-3 firing order?
Posted: Wed Apr 10, 2013 12:26 pm
by CaNsA
To stop things melting/warping etc etc
The zxr400 is one of the most overly engineered bikes EVER.
It has very tight and sp[specific tolerances that it works within.
The time between the sparks give the cylinder time to cool down, not by much but just enough to stop a hole from ripping in time and space.
And no-one can be arsed trying to fix that little clusterfuck.