Maintenance & Technical > KX500 Original

Exhaust valve timing..?

<< < (7/9) > >>

John:
I would like to go back to the core of this thread; will there be any benefits in changing the opening time of the exhaust valves?

The equation is slightly more complicated than I originally suspected?

I think I am more or less correct assuming that there are two major parameters involved in the KX5 exhaust; KIPS and pipe. The properties of the pipe are most likely more important that the timing of the exhaust valves. I can tell by looking at Mun?s diagrams.

Let?s draw two different scenarios / approaches;
1. The properties of the pipe are fixed ? exhaust valve timings are variable:
In this case, it would be possible to adjust / optimise the timings of the valve to fit the pipe properties.

2. The exhaust valve timings are fixed - pipe properties are variable:
Typically change the properties of the exhaust pipe until it?s optimised with the timing of the exhaust valve.

It probably safe to assume that the original exhaust pipe and the default exhaust valve opening times are optimised and tuned by Kawasaki..?

I don?t think it?s advisable to attack both approaches at the same time. Maybe choosing a pipe depending on the overall desired effect profile (and get the jetting right), then adjust the spring (exhaust valve timing).

I am not sure I fully understand how much or little the exhaust valve timing impact the characteristics of the engine.


Any thoughts?

//John

YUNGGUNNAZ:
i am hoping that once pipe and carb combo are chosen(fixed properties)then changing the valve spring,washer or both will show itself on the dyno graph.both in rpm opening and power curve andreaching peak hp. sooner(maybe).i believe it will start the hp. climb sooner.

doordie:
Guys,
You know that KIPS have one more dimension.... :roll:
When KIPS closes it makes your PIPE "fatter"!
You have a extra volume in a chamber in barrel to make more low torque.
It foul pipe to think it has more volume at low rpm and less in high rpm range. :wink:
"You eat cake and have it still"(sorry about my english,John don?t kill me). :oops:
(Kx500 have smaller stock pipes than Cr500)

//doordie

Spider:
"Have your cake and eat it to" :lol:

Your English makes more sense than mine.

Dale

John:
Doordie,

Don't worry, my English seems to be OK because I use an English spell checker and have lived in this rainy country for 5 eyars now. As long as you are making yourself understood you're fine!

I fail making myself understood on a daily basis - it's called work. Noting to do with the English language though, just the English people  :(

I hope something good will come out of this thread. I am tooo lazy to participate with any real work, just stupid comments.


//John

Navigation

[0] Message Index

[#] Next page

[*] Previous page