125-200cc WR125 tuning question

I would try 1 or 2 sizes leaner on the pj,I think most shoot for 1 1/2 turns out on the AS,at least I do and my bike runs great.
What main are you running and what does your plug look like? any spooge?

I would also look at the PV arm adjustment and ignition timing
I think it is possiblly just the nature of the beast - so may need fmf pipe , head work or 144 kit
However my 08 ran a lot better with power valve arm at 3/4 and a leaner pilot . I would prefer to have needle at 2 or 3 and maybe this can be done if you go leaner on pilot
(Varying temps didint seem to make a lot of difference to mine - its been getting cool and still running better when leaned up)

Can you change the timing on a wr? I haven't pulled my cover yet,just thought it was fixed?

yes you can change timing...but the cover has to come off then the flywheel pulled to get at the base screws....

on a CR the flywheel is smaller and does not have to come off

Thanks,I just took the cover off to see that.I have a car balancer puller to hopefully get the flywheel off.

It is hard to diagnose by someone elses description sometimes, but you went leaner and it got worse.
Read my post's, try putting some fuel to it.
GP

See if this will help you.

1. Start with your main on top and read your plug. When it was cool out 70ish, mine likes a 185 main. As the heat and high humidity is coming in around 90-95ish, I brought mine down to 180. I think this is why I seem to have retained my top end.

2.) Put your blue needle in with clip in the middle slot.

3.) Try working on the pilot now. I tried the 45, 42 and am going to settle at 40 with the heat and humidity. Air screw should be 1 1/2 turns - 2 turns (Adjust it in quarter turn increments when the bike is completely warmed up).

4.) Now try moving your needle up or down from there. Mine likes the 3rd down from top.
Red needle does not work on mine.

5.) I went with Stock spring and Walt's blue spring. I want mine to come on low and tractor to the top. I think this is why I seem to have retained my top end.

6.) Leave your power valve cover off and first set your power valve to just a little gap from crown of screw to top edge of slot. I used a pocket screw driver tip to stick in there for the first gap and mark it. Ride the bike and start moving the screw up in a couple of MM increments till you like it. Set it and mark it for life.


7.) I was running Maxima 927 40:1 and switched to Amsoil Dominator 40:1. I had a theory that the castor oil was slowing up my power valves a little?


The bike has a great throttle response from low to the top. The other night, I just stuck my TMX back on for kicks. At first, I had to back out the air screw 1 turn and the TMX was dialed in again. The TMX is permantly resting in a nice Keihin Box. What a difference!

Hope this helps.

Your elevation?

Norm,

I am at 950-1000ft.

Darin

Thanx for sharing. I'll try this soon.

Yes, thanks. I'll try all your suggestions, one thing at time!

Follow up

I want to thank those who have gone before me and have posted their setups in this thread and in other places. I kept the 40 pilot jet and changed to a 185 main. Blue needle in the middle position to start with and two turns out on the air screw. I also adjusted my power valve to where the bolt is in the top of the slot. The bike was so much better everywhere! I felt that it still had a slight stutter at around half throttle so I raised the needle one position. It has never been this good! From a purr to a scream it is great. I don't know if it can be gotten any better as I didn't get to ride very long before it suddenly quit. I checked and it had fuel but no spark Check this tread to learn more: http://www.cafehusky.com/forums/showthread.php?p=102155#post102155

Great to hear that. Now try a 180 main. Leave your clip where it is at and your air screw.
You can switch out the main in 5 minutes while the carb is on the bike. Next take your powervalve cover off. If you moved the bolt all the way up. Start bring it back down in a couple mm increments till your bike is crisp on the throttle. It should get rid of it. You should try Walt's spring kit. I really like the stock and blue spring for Harescrambles.

Hey David it sounds like you are getting her dialed in with some awesome ifo from fellow members. Sorry I haven't been much help since my spill but it sounds like you have it under control my friend. Thanks for helping guys!