why a 1-2-4-3 firing order?

ross46 · Post by **ross46** » Tue Apr 09, 2013 6:17 pm

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

Post by **banner001** » Tue Apr 09, 2013 6:29 pm

its to do with minimising engine vibration and overall crank balance.

CaNsA · Post by **CaNsA** » Tue Apr 09, 2013 6:36 pm

And heat dissipation.

Think about it, if it went 1234 then the time for 1 to fire after 4 would be huge.

ross46 · Post by **ross46** » Wed Apr 10, 2013 11:17 am

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?

CaNsA · Post by **CaNsA** » Wed Apr 10, 2013 12:26 pm

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.

www.zxrworld.co.uk

why a 1-2-4-3 firing order?

why a 1-2-4-3 firing order?

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