After thinking about it, and how the ach works, why does its position matter anyway? The bikes engine never stops and starts in the same spot...so what if its 10° off?

 

Marcelino actually answers that question in the original post. Difficult for me to explain but he does a great job at it. Need to read it a couple of times, though, before it sinks in...

 

I read somewhere on the net about hard starts with the 09 klx and Kawasaki recommended shaving .020 off the ACR to help with start up.
I wonder if shaving it would do the same as turning it 7 deg?

"The ACR in the KLX ( at least the new ones ) is EXACTLY AT THE LIMIT"
What end of the limit? Too much or too little?

 

Well, I have read through this entire thread about 2 times now and I will admit I'm still not fully understanding. Does this free mod add any HP. If so how much is it adding to the "what every one claims is 18hp stock".

 

I read this at the bottom of the very first post:
Ladies and gentlemen ( and those who aren´t sure ) : WE HAVE 25 HORSIES ! .
And a big fat and flat layer of torque to go with it

so i think the gain is 25-18= 7hp gain????

 

Hey bumblebee,

From what I understand of Marcelino's post, when you retard the exhaust cam (opens a little later) the ACR also retards if not adjusted on the shaft. When the ACR retards (not adjusted for the shaft position change), that means that there is a little less compression available for starting. That's why he says to press it out and move it back the other way. Otherwise it will start cold like it was a worn engine and hardly start at all hot.

In fact, he moved it (ACR) a little bit further advanced of it's original degrees to compensate for anticipated wear over time. (Marcelino, correct me if I mis-understood your original post)

It's getting late for me so off to bed, now! Hope this all helps.

 

I read every thing so carefully, I have no idea how I could have missed that. I feel like a jackass now!

 

It sounds like we have one positive review and two not so positive or neutral reviews. So is the jury still out on this one?

 

I did the mod for my 351. Everything felt really good in gears 1,2,3,6. Gears 4-6 were muddy. Not sure if it's a timing issue or jetting issue or what. Definitely picked up the low end though.

 

How can you get results by moving only one cam??