2001 YZ426F Carb Rebuild


4 replies to this topic
  • Atomicchuckle

Posted April 08, 2016 - 12:02 AM

#1

I recently purchased a carb rebuild for my 2001 yz426f. Everything looks like it was there EXCEPT the diaphram. I ended up putting the old diaphram back in, but I am not sure which way it is supposed to go. Does anybody know exactly how describe the correct position? Shoukd I have gotten a new one with my rebuild kit?

 

I ask because I had the bike running, but it ran terrible and the bike was sluggish off idle (before and after the rebuild). I tried adjusting the pilot screw (1 1/4 turn out) as per the recommended setting, but now the bike won't even start no matter what I do. Any ideas as to why the bike wont start other than a backwards diaphram? Really stuck here need some help. Thanks guys!!



  • Krannie McKranface

Posted April 08, 2016 - 05:10 AM

#2

The raised edge of the diaphragm goes toward the float bowl cover, not the apump cover.

 

This should have no effect on starting.

 

Clear the cylinder of unburnt fuel: throtle Wide open, kill button held down, kick a dozen times.

 

Try starting again, with no throttle.


Edited by KRANNIE, April 08, 2016 - 05:11 AM.


Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • toten

Posted April 08, 2016 - 08:31 AM

#3

I haven't had my YZ long enough to know, but my WR REALLY hates old gas. It was idling lower on 3 week old gas. When I put it in, it ran fine. Let it sit for 3 weeks, it ran poorly. I hit reserve, filled it up, now it runs well again. At one point, on 2 month old gas (I got hurt), I couldn't get it to start. Since finding out that 3 weeks is enough to matter, I make sure to use fuel stabilizer and fill it all the way up (less air to help it go bad). 

 

I can't say that it's what your problem is, but I sure didn't realize how much mine cared. In comparison, my SV1000 fires right up on 6 month old gas.



  • grayracer513

Posted April 08, 2016 - 08:54 AM

#4

I had to do an intake manifold on an S-10 once that cam e in running on a Monday.  It was finished that Friday morning, but wouldn't start.  We found that the gas had gone over the line during the week and was so bad that you couldn't even pour it on the floor and light it with a match.  But hey, the new fuel blends are good for the... something or other.



  • toten

Posted April 08, 2016 - 09:49 AM

#5

Slightly lower emissions at the expense of mileage, and they keep shops in business.







Related Content

 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.