cylinder head breather hose???

3 replies to this topic
  • wildair99

Posted August 25, 2001 - 11:54 AM


Today when i got finished riding i noticed a small amount of oil coming out of the cylinder head breather hose, can someone tell me if this is normal or not??????? It wasnt very much oil, just a little bit that came out of the hose onto the frame....


  • Sandracer-UK

Posted August 25, 2001 - 01:02 PM


its normal,, and can happen if a] u put to much oil in or b] the oil is whitish ,,evaporated then poped outa hose

word of warning,, the pipe will suck up water if u sink in a river/puddle etc

re rout or wotever
i added a t piece and a pipe which runs upwards so in water it wud suck the air from the top not water from bottom

"when the dust storm comes they say the devil rides in"

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

Posted August 25, 2001 - 02:59 PM


Mine and my friends both drool about 2 to 5 drops of oil after a long ride.
Sandracer-UK when you say that the "pipe" will suck water, do you mean the breather hose?

  • Sandracer-UK

Posted August 26, 2001 - 12:13 AM


yes the head breather pipe that run down below the frame will suck muck and water into ur head/valves cam etc [mucho £/$]
and i know the local shap has fixed lots of bike with this damage
i know of people that have put a fuel filter on the end,, but it really seemed to stiffle power,,, others route the pipe into the air box,,,, but ive heard mention of the quality of air it chucks directly at ur filter,, i wud worry more about it covering everything in white sticky oil.

so the way i fixed it was ,,where the head breather tube curls at the top to come down i fixed a t-piece with another hose running under the tank,, this way if i started it in water it wud just suck air thro the free top pipe instead of struggle sucking water from the bottom

hope this help,, lots of people have different ideas on how to fix it,,, just my 2 pennys worth

"when the dust storm comes they say the devil rides in"

Related Content


Megabomb Fitment by 288yz450

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

Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On January 15, 2017

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

Snake pit oct 30th by The Anvil

Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies

James Stewart back on a YZ450F by YamaLink

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies

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.