Bottom end leak

[blaster003]

is this something I need to really look at or not the whole bottom end and gaskets were replaced by my dealer in the picture there is a little oil on the case I havent seen any puddles under it yet just tell me what you guys

 

[tbrooks]

If its just the case oil leaking then it is not a big deal, so long as you pass a leak test.

 

[dirtysquared]

Clean that up really good and see if its coming from the seam of the case halves. If it is, They need split, lapped and re-sealed.

 

[98blaster]

That's really close to the seam of the actual crankcase, id leak test that thing immediately, if its ok, an its just a small seep from seem at tranny id run it till your riding season is done then split cases an lap an reseal them.

 

[Larry's Shee]

As mentioned, leak test it.
Maybe check that all screws are tight. Be sure to use correct torque value.

 

[blaster003]

Where can I get a leak tester for cheap

 

[blaster003]

It is the seam is there a gasket there? The dealer rebuilt the bottom end. I might see if they can repair it if not is it hard to do it myself? Don't have much money right now

 

[Blaaster]

There is no gasket between the case halves, they are bonded.

The dealer is responsible for it leaking at the join, they must not have lapped the cases to ensure a proper fit up.

 

[blaster003]

How do I lap the cases

 

[Blaaster]

One needs a perfectly flat surface, plate glass, marble slab or surface plate.

Tape abrasive paper to it, and figure 8 the mating surfaces using Metholated Spirit as a lubricant.

 

[blaster003]

I cleaned it up and the leak is at the seam of the cases. It only leaked enough oil to barley show up on my fingure

 

[Blaaster]

If oil will leak, air will leak better.

Leak test to see just how much, because only a little leak can cost major $$$$$$$

 

[Jeff Bennett]

this is exactly where mine is leaking. Isnt there a seal between this and the crankcase. Both would have to be leaking to cause problems for the engine wouldn't they? All the money I have spent on the top end, I don't want to have to do it again. Is there some kind of sealant that can be put on this if it passes a leak test that will hold the tranny oil?

 

[blaster003]

i jb welded it and it holds fine

 

[Jeff Bennett]

did you do the leak test? Thanks man.

 

[blaster man1]

you can get a leak down tester from awk08 just pm him he will sort you out

 

[Jeff Bennett]

I bought a harbor freight leak down tester. It goes to the spark plug hole though. I guess that will still work, just need to block the intake and exhaust?

 

[tbrooks]

It will work, just won't let you know if you have a leak on the intake boot past the reeds, whuch are notorious for leaking