CLUTCH444

Member
Apr 13, 2010
19
0
help yz 125

hey

im trying to get my bike ready for track here in the next week and im having trouble with my bike. I rebuilt the top end, and redid some internals on the bottom block such as the water pump and push rod assy. for the power valve(never split the casing).However, now when i start it, it acts like its being held open at full throttle. The jets are right(stock), the carb slide is all the way down, the floats not jammed, the air/fuel and idle are set to stock. its got a new spark plug, new gaskets, and everything has been double checked for loose bolts for air leaks. Any suggestions are greatly appreciated.

thanks
taylor

#444
 
Last edited:

Tony Eeds

Godspeed Tony.
N. Texas SP
Jun 9, 2002
9,535
0
Welcome to the site, Taylor.

I moved this to 2 strokes for more views.

T
 

whenfoxforks-ruled

Old MX Racer
~SPONSOR~
Oct 19, 2006
8,129
2
Merrillville,Indiana
If it was me, I would NOT use propane. Non-chlorinated brake cleaner and baby powder is a lot safer. You are more than sure the slide is closing all the way? Have you checked the plug? Wet or dry? Vintage Bob
 

mathd

Member
Oct 11, 2008
208
0
No propane bottle,
Make sure the carb slide is closing properly once again even if you did already.
Check the spark plug wet/dry.
 

CLUTCH444

Member
Apr 13, 2010
19
0
ill check the carb slide again and wet/dry plug. i just got the material to make a leak down tester as well. i noticed last night that when i started it once, and dipped the bike to check the float, it dumped a bunch of fuel out the carb. does this mean a faulty float or carb? could this be causing part of the issue?

thanks again
taylor
 

CLUTCH444

Member
Apr 13, 2010
19
0
Hey wanted to thank you guy for your help. It was a faulty gasket on the intake boot that i had overlooked....its always the easy sh*t that gets ya in the end. Engine runs perfect now.

See ya on the dirt
Taylor
 
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