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MxAddic Liked a reply to forum topic DangerBoy Responds

3/10/2024 4:58pm
That's what happens when you have been told you are the best at something your entire life and you find out you are not.
This forum topic has 392 replies.

MXRICH Added a reply to 2008 YZ125 Break up at top

8/19/2018 6:00am
Update: Looks like it was the power valve shaft seal. Replaced it. Friday and yesterday at Budds my son was hammering it. No break up. During practice yesterday it broke a little. 1/2 turn on air screw cleared that. THANK YOU ALL!!

MXRICH Added a reply to 2008 YZ125 Break up at top

8/10/2018 5:46pm
Matt, It i escaping through the seal for the power valve shaft. I was forward thinking and ordered them along with crank seals. Arrived today. Will replace in the am. The air pressure bleeds off immediately. seal behind flywheel is good. Frustrating as hell. head gasket, intake all look good. Anyway to to tell if clutch side seal is leaking...

MXRICH Added a reply to 2008 YZ125 Break up at top

8/10/2018 10:26am
Update: rigged an air source to do leak down. seems like all air is out through power valve.Plug the hose but seems to bypass seal. Pressure drops right down. Make sense that power valve seal would do this?

MXRICH Added a reply to 2008 YZ125 Break up at top

8/7/2018 3:56pm
Matt, That is my plan on Friday. My understanding is the power valve shouldn't pass air so is it necessary to block the vent tube?

MXRICH Added a reply to 2008 YZ125 Break up at top

8/6/2018 4:54am
So I am going to do a leak down to check. Quick question, is it best to do the test inputting air through the plug hole or intake?

MXRICH Added a reply to 2008 YZ125 Break up at top

8/6/2018 12:56am
Matt, How did you find the leak on your son? Sandman, Breaks up either on the stand or when being ridden. Pulled the reeds last night. Excessive gas in the intake area.

MXRICH Started a new thread 2008 YZ125 Break up at top

8/4/2018 2:10pm
Guys, HELP. 2008 YZ 125. Sounds crisp until you hold it wide then it breaks up. I rebuilt carb with stock jets. Bike is stock. Put in new crank seals, new top end. TILL happening. Carb has all new float, jets, seat etc.. Measured fuel level. My gut tells me MAYBE reed or coil??? Coil ohm to spec. PLEASE any...
This forum thread has 20 replies.

MXRICH Started a new thread 08 YZ 125 Timing

6/26/2018 7:51am
Sow while troubleshooting a bogging condition I decided to check the crank seals (will just change since I'm in there). I loosely decided to check the timing. Following the manual and using a dial indicator it just doesn't align. Not close.. It states to find TDC. Easy enough with the dial indicator. Form there is says to turn clockwise the...
This forum thread has 18 replies.

MXRICH Added a reply to 08 YZ 125 Timing

6/26/2018 7:51am
Chillrich, Paw Paw, Want to THANK YOU both for your help here. The explanations and diagrams were a great help. I'll let you know when it's all back together how it turns out.

MXRICH Added a reply to 08 YZ 125 Timing

6/25/2018 7:11am
Paw Paw, I agree and that is how I will set it. Unfortunately the manual shows the mark on the flywheel should align with the mark on the stator and that misses by quite a bit. If you don't mind another quick question, while OHMing the coil. On the primary coil resistance. Manual says .24 - .36 ohms. When I...

MXRICH Added a reply to 08 YZ 125 Timing

6/25/2018 5:15am
Paw, It does appear to you then that something is amiss with the manual? I will adjust the stator accordingly by the "trigger". Unfortunately I don't have access to another YZ to reference. Thank You

MXRICH Added a reply to 08 YZ 125 Timing

6/25/2018 1:06am
It is an OEM crank. The key is indeed in. Just that flywheel isn't torqued in to spec so I can slip it off checking to make sure flywheel and crank have not mis-aligned. Where should "trigger" be when at correct timing? Just beginning to trigger or mid-point of the pickup coil?

MXRICH Added a reply to 08 YZ 125 Timing

6/24/2018 3:33pm
Paw, I have the flywheel off,Eyeballing the key way and groove in flywheel to be sure. I just put it at TDC. The flywheel mark is 1 1/2 inches to the left of stator mark. Took a picture but not sure how to upload here.

MXRICH Added a reply to 08 YZ 125 Timing

6/24/2018 3:09pm
Thanks for posting that. So I found TDC spinning it counter clockwise. Then clockwise 19 increments. Still off about 1 1/2 inches from the mark. Doesn't make sense.