Just Re-built 426



3 replies to this topic
  • jamiel_54

Posted June 29, 2002 - 03:12 PM

#1

I just re-ringed my 426 today and after i re-built it, i was just kicking it through with the decompression lever held to lube everything up, well i stopped for a minute to check fluids, then started kicking again, and my decompression lever was sticking like the valve was open, but i'd kick it farther and it would come back to normal, it keeps doing this. I think it might be timing, but it confuses me how it happened, any thoughts or suggestions? Has it happened to anyone else?

  • idahofourstroker

Posted June 29, 2002 - 04:39 PM

#2

You could be right about the timing. I would recheck it. Also, did you do a valve job? It might need one.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • YZ400Court

Posted June 29, 2002 - 04:42 PM

#3

oops

Posted Image

[ June 29, 2002: Message edited by: YZ400Court ]

  • YZ400Court

Posted June 29, 2002 - 04:45 PM

#4

Originally posted by YZ400Court:
It is normal for the decomp lever to go slack when the valve opens. The cam pushed the valve bucket further than the decomp lever does, so when the cam is in the right spot, there will be no pressure from the valve spring in the decomp lever if you pull it. It is not normal for it to be noticable unless your pulling on it. The lever should not move on it's own. There is a spring that keeps the actuator on the head retracted when your not pulling on it. It the spring there?







Related Content

Forums
Photo

2016 YZ450 by CaptainKnobby


Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies
Wiki
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info


Articles
  • 0 replies
Forums
Photo

Michigan Motocross Tires by 288yz450


Dirt Bike   Dirt Bike Regional Discussion   North
  • 1 reply
Forums
Photo

100 hrs on 2014 yz450f, shim valves or replace them? by ttr230rider6


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  79 replies
Forums
Photo
Motocross

Thinking about Yamaha 250... by Arctic Pride


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  491 replies
 
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.