Well, just finished up with the Hot Cams install in my newly acquired 2001 WR 426. It is a Canadian model, in mint shape with 298KM's on it...Bought it from a good dude that knows bikes and he took good care of it.. Anyway, I can't leave anything stock. I have been on Thumper talk due to owning a 01 KX-500 with Stewart mods that absolutely freakin rips... I read about the Hot Cams and auto decompression and thought that would be a good place to start. So, I ordered the exhaust cam, didn't get around to installing it so, by the time I wanted to, so I ordered the intake cam to go along with it... I will only hit the high points... I installed the cams per the videos and the threads on here, all went well. I fired it up, took it out and man, did it freaking rip...I mean instant peg...But, I had backfires on decel and when I shut it down, it backfired LOUDLY... I am enough of a motorhead to know that something (outside of jetting was wrong). so I tore it down again and I had the intake cam 1 tooth advanced. Perfect! I could see it now but not when I put it together...Why??? Because, It take 3 hands to hold the engine at the timing mark, stretch the cam chain and position the cam....The cam timing mark is the I, not the H... So if assembling, you must be sure to take up the slack in the cam chain before setting it... Shimming... Exhaust needed a .25 bigger shims to give them .23 mm clearance once the Hot Cam was installed...The intakes all came to .13mm when the Hot Cam was installed... Perfect! So I put it back together then had carb problems...Bike was popping on decel, took some effort to start..So, I bought a JD Kit...Installed Blue needle on clip 3, installed 170 main...I am in Las Vegas (2300 ft) and it is not hot yet... I also did the BK MOD and timed the AP...Installed a zip Ty fuel screw I put it back together and man did it BOG! So, I started backing of the BK MOD screw until I got no bog...Squirt might be 1 second... But I was still getting popping on decel...Check new Spark plug...WHITE! Lean... The bike had the stock pilot jet in it , a 42. I went to a Honda dealer all they had was a 48, so I stuck it in there.. Ta Da!!!! We have a winner.. Took it out and HOLY CHIT MANG! This thing rips!. It was too lean of a pilot jet, stock was 42 . So, now as it gets hotter I will put a 45 in there and probably back the main down a little depending on plug color. I honestly feel the Hot Cam Stage 1 Intake cam leaned the bike out and now it likes more fuel...The auto decomp cam is the Shiznit! Time will tell. Next to install, a full Dr D exhaust. Cheers!