I've got a Pro Circuit aluminum throttle tube on my 500, but I don't know if you can get them for the K5 anymore.
My 250 has a Moose aluminum tube...and it works as smooth as the PC...
and yes, as far as cables go...stick with OEM.
Have you ever used the Motion Pro unbreakable non-aluminum one?
How do you like the aluminum ones, and do they bend in a fall?
Thanks for your input.
when it comes to throttle assembly and clutch cables....Motion Pro is garbage, period....they make some very quality stuff, but they failed miserably in the throttle and cable department.
I have some throttle and clutch cables hanging on my wall that have less than an hour time on em...and I tried a throttle tube that said right on the package "Fits 89-04 KX500"...not even close!
The alloy tubes work great, I've never broke or bent one....it's good to take the assembly apart frequently to keep everything nice and clean....metal tube on metal handlebars really need to be kept CLEAN.
Stick with OEM cables...they are the best.