In need of some help!



8 replies to this topic
  • 412MotoRob

Posted October 24, 2015 - 04:08 PM

#1

Just replaced the outer seal on a 2005 yz450f water pump because it was leaking, changed the seal started it for about 15 seconds & it didn't leak, then proceeded to take it up & down the street a few times & when I went to park it I realized it was leaking fairly steadily....& then I let the bike cool for a few mns and then I let it idle for probably 30 seconds & it wasn't leaking but I can't run the bike anymore cuz my yoshimura exhaust is too damn loud & it's getting late & now I'm like wtf.. & no the seal is NOT in backwards & my shaft is not grooved. So here's my question, does a new seal need to "set in"? Or do I have another issue?!?

  • 412MotoRob

Posted October 24, 2015 - 05:18 PM

#2

^^just really paranoid something's wrong

  • Goonyz400f

Posted October 25, 2015 - 11:28 AM

#3

I'd say get another seal and do it again and if it does then something is really wrong

  • Krannie McKranface

Posted October 25, 2015 - 02:19 PM

#4

Did you inspect the shaft for wear? 

The seal can only seal if the shaft is perfect.



Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • 412MotoRob

Posted October 25, 2015 - 03:05 PM

#5

Did you inspect the shaft for wear?
The seal can only seal if the shaft is perfect.

there's marks all over where the old seal was but I can't really feel anything?

  • grayracer513

Posted October 26, 2015 - 06:55 AM

#6

One thing to look at is the balancer shaft bearing.  The inner end of the shaft is supported by the balancer shaft.  With the right side cover off, check for vertical play in excess of .006".

 

Your seals are oriented as shown here? 

 

SealsLabeledsm.jpg



  • 412MotoRob

Posted October 27, 2015 - 11:23 AM

#7

One thing to look at is the balancer shaft bearing. The inner end of the shaft is supported by the balancer shaft. With the right side cover off, check for vertical play in excess of .006".

Your seals are oriented as shown here?

SealsLabeledsm.jpg

not really sure how to check but I guess I'll just wiggle it around and see if there's play? & it doesn't leak right away, it takes a good 30 seconds of idle and a slow drip will start. & if the balancer bearing is shot is that easy to replace? But I think it very might well be just the shaft, I could see marks all over where the old seal was but I didn't really see any scoring, I should probably feel it to make sure it's smooth. & how sensitive are these shafts to leaks?

  • grayracer513

Posted October 27, 2015 - 03:04 PM

#8

The shafts are really fussy.  Roughness and scoring in the sense you probably think of either one are well beyond what it takes to get one to leak.  Anything you can feel by dragging a fingernail over the surface is probably enough to cause trouble.  Looked at another way, if you can't polish the marks off in a few minutes with 320 grit, it's bad.

 

The balancer shaft bearings in the '03-'05 Gen1 450's require the cases to be split to replace them.  The Gen2 ('06-'09) can be done in the bike, but it's a challenging procedure, and not for the marginally skilled.  The link below may also work for the later Gen3 & 4 engines, but I haven't researched that.

 

http://www.thumperta...N#entry11302329



  • 412MotoRob

Posted October 27, 2015 - 03:27 PM

#9

The shafts are really fussy. Roughness and scoring in the sense you probably think of either one are well beyond what it takes to get one to leak. Anything you can feel by dragging a fingernail over the surface is probably enough to cause trouble. Looked at another way, if you can't polish the marks off in a few minutes with 320 grit, it's bad.

The balancer shaft bearings in the '03-'05 Gen1 450's require the cases to be split to replace them. The Gen2 ('06-'09) can be done in the bike, but it's a challenging procedure, and not for the marginally skilled. The link below may also work for the later Gen3 & 4 engines, but I haven't researched that.

http://www.thumperta...N#entry11302329

I really appreciate the help man, & I can actually feel 2 distinct notches where my finger nail gets caught now that you told me that, I didn't know the shafts had to be that spot on?? But hey I guess it's a good thing I bought extra case gaskets I'll update this when I get the shaft.





Related Content

Forums
Photo

Michigan Motocross Tires by 288yz450


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

Chubby dad, looking at bikes , First trip to the orange/black forum ! by Slow_ride


Dirt Bike   Make / Model Specific   KTM   250-530 EXC/MXC/SXC/XC-W/XCR-W (4-Strokes)
  • Hot  28 replies
Forums
Photo

The "going back to the other darkside" adventure... by Monk


Dirt Bike   Make / Model Specific   KTM   250/350/450/505 SX-F & XC-F (4-Strokes)
  • Hot  113 replies
Forums
Photo

Snake pit oct 30th by The Anvil


Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies
Reviews

Yamaha YZ450F 2017 by Chris.GVS


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