Another Compression Loss/Recover



3 replies to this topic
  • 426Just4Fun

Posted July 27, 2002 - 04:44 PM

#1

Just finished lots of work, including setting valve clearances (only one intake slightly tight). After getting everything back together NO COMPRESSION. Pulled it back apart, re-checked and came up fine. Back together and still nothing. Loose enough to kick it through without de-comp lever.

Did a search here and found others with similar probs. Kicked it through for awhile (numb foot) and finally got it to start. After warming up it's now back to normal compression.

Just thought I'd post another description to warn others not to freakout when it happens to them.

  • thumper4life

Posted July 27, 2002 - 05:41 PM

#2

i wish there was a definitive answer on why this happens! lol :)

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • RSA210

Posted July 27, 2002 - 06:23 PM

#3

Thats a real wierd problem,last time I noticed I could kick through the comp. stroke w/o the lever I found that I had installed the carb slide UPSIDE DOWN.I always wondered why it did that???
Things that make you go huuuuuummmmmm

  • whippina426

Posted July 29, 2002 - 11:14 AM

#4

that happened when i changed the plug! I thought some dirt got down in there and stuck the decom lever open. Just kept on kickin, started and back to normal. I hate probs w/ my bike.





Related Content

Forums
Photo

Snake pit oct 30th by The Anvil


Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies
Forums
Photo
Motocross

Thinking about Yamaha 250... by Arctic Pride


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

yz250x vs 450 4t comparisons (preferably desert riding) needed by JakeNorthrupYZ450F


Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 9 replies
Forums
Photo

Megabomb Fitment by 288yz450


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply
Forums
Photo

YZ450F 03 Sparks driving me crazy by SirAttard


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 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.