My input so far: Putting in an '06 YZ exhaust cam (5TA-12180-10, has decomp)
- lower the idle drastically, you'll need to max out the idle adjuster
- be able to kickstart easily
- allow the starter impressive rpms but won't fire up
A failure so far, so what is a drop in replacement for an EFI WR (2012 onwards) that has YZ timing AND functions well with the E-start?
This is the stock WR450f cam in position
This is the YZ405F 2006 cam installed in my 2012 WR450F, notice the differen angle the decomp mechanism is sitting:
At least this explains the various 13 pin vs. 14 pin counts between the 12 'o clock positions:
'06 YZ cam has the 12 'o clock punch at a different position than the '12 WR cam, hence the count towards intake cam is different.
But how can that be, that the decomp mechanism is "rotated", if we keep the 9 'o clock alignment punch flush as it should be?
Does a non e-start YZ450F '06 (ist that correct '06 YZ were kick start only?)
need the decomp activaed at another position in the compression stroke, than a WR450F'12 needs it to be able to e-start?
I'm am puzzle to see the differently positioned decomp. I assume the activation direction of the pin relative to the decomp mechanism is always the same.
Edited by WRF-Rowdy, June 03, 2015 - 07:02 AM.