Hey awesome job and just wanted to say thanks for posting this. Now what I really wanna know is. hows the power? What mods have you made (i.e exhaust, tuner / map settings) and what do you think of the YZ cam?
Power is lacking, compared to my '03 WR with then stock WR timing.
But as the regualrs have pointed out the post-06 intake cams have 1mm less lift, god knows why
(old '05 cam is under way )
The most restrictive thing was the pea shooter , naturally.
Removing the snorkel only helped a bit. I figure if yamaha restricts air intake by reducing intake cam lift,
you can almost do what you want at other places, the '03 will win.
I'm trying to be stealthy w/o lightlheartedly sacrificing power. Just 10 mins ago I tried the stock muffler
with spark arrestor but w/o end pipe, just the domed cap. Beautiful, deep sound, but a tad too load.
The reason for YZ exhaust cam (and soon '05 intake cam) is that I liked the road performance
the old cam setup did give me w/o binning the stock '03 euro/aussie exhaust.
And, philosophically speaking, I don't see any reason why I should give up ponies that are readily there.
If one wants a less torquey bike, he should not ruin the engine by messing up the cam timing,
instead he'd better get himself a WR250F. Buddy had one for many years, perfect offroad bike.
From what I've learned the last month about my '12 model, I'll probably end up with
'05 intake cam, '06 YZ cam, and the 20mm exhaust pipe. Snorkel is undecided as of yet,
removing it makes it louder at medium power setting too, no good for inner city peace of mind.
I'm very partial to with regards to mappings, but I'll try "fuel -4 / ign +1 everywhere" on my ride into town,
just to see it it does anything noticable at all.
Edited by WRF-Rowdy, June 16, 2015 - 08:23 AM.