KX Riders

Maintenance & Technical => KX500 Original => Topic started by: bob larry on May 04, 2010, 07:36:51 AM

Title: Bottom End Leak Down
Post by: bob larry on May 04, 2010, 07:36:51 AM
Hey guys,

My top end is out getting a new life........If I put a plate across the top end opening ( with the gauge and valve installed into the plate) couldn't I leak and vaccum test the bottom end to see
if I need to tear it all apart?

The gauge came in the mail and I have the stuff to make it after my rebuild.....but I am bored waiting for the jug to come back.

With a good plate over the top end it should hold 6 psi for a long time.......no.?

Let me know what you think


 :mrgreen:
Title: Re: Bottom End Leak Down
Post by: DoldGuy on May 04, 2010, 07:47:26 AM
Bob,
If you make the plate to seal, then yes you can test it that way. And it should hold 6 psi for at least 10 minutes.
Also make sure you do a test after the motor is together to confirm everything up top is sealed too (mine had a leak thru the power valve seal)
Keep us posted on your findings!
DoldGuy
Title: Re: Bottom End Leak Down
Post by: dave916 on May 04, 2010, 08:39:27 AM
is the conrod going to make that test a little awkard?? 
Title: Re: Bottom End Leak Down
Post by: DoldGuy on May 04, 2010, 08:43:51 AM
is the conrod going to make that test a little awkard?? 


Yup!
Title: Re: Bottom End Leak Down
Post by: bob larry on May 04, 2010, 08:53:48 AM
Good Call.... :-o

Would be a messy silcon battle to seal around the rod.

The seal kit came in so I'll just tear it down.
Title: Re: Bottom End Leak Down
Post by: DoldGuy on May 04, 2010, 09:08:19 AM
Good Call.... :-o

Would be a messy silcon battle to seal around the rod.

The seal kit came in so I'll just tear it down.


And that's the Best Call! :-D
Title: Re: Bottom End Leak Down
Post by: Speedway73 on May 04, 2010, 02:47:42 PM
Not if you made a "Top Hat" type plate. :)
Title: Re: Bottom End Leak Down
Post by: Goat on May 04, 2010, 02:50:42 PM
If you have the parts and waiting on the jug you might as well just do it while it's down. Let me know if you have any questions.
Title: Re: Bottom End Leak Down
Post by: bob larry on May 05, 2010, 01:25:09 AM
Not if you made a "Top Hat" type plate. :)

Was looking at it last night and ya when at BDC you would only need a 2" dome or top hat..lol
Would save a lot of work if it is all air tight.
Maybe I'll widdle one out of wood. :mrgreen:
Title: Re: Bottom End Leak Down
Post by: bob larry on May 13, 2010, 06:29:42 AM
Since the bottom end with a cap on it, is sealed tight it should hold the vaccum pressure for a long time ... no ..?