A forum for owners of Yamaha TTR250 trail and enduro bikes!

Members Login
Username 
 
Password 
    Remember Me  
The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Mystery oil leak from header pipe?
Post Info TOPIC: Mystery oil leak from header pipe?
ontheroad


Newbie

Status: Offline
Posts: 3
Date:
Mystery oil leak from header pipe?
Permalink  
 

Hey guys, 

 

Just wondering if anyone's ever experienced a similar issue, and could offer advice?

 

I've got some oil blowing/leaking out the front of the engine block from the header-pipe intake.  Please see pic attached (you can see the dark oil patches on the fins of engine).

 

I initially thought it was a problem with my rocker-cover gasket, so I replaced that.  Then I figured it was my header-pipe gasket, so I replaced that also (and am pretty sure i've done a good job on tightening all nuts etc), but neither of the gasket replacements has fixed the issue???

 

I'm not losing a massive amount of oil and probably wouldn't even need to top up oil levels any more regularly than normal, but it does annoy me that I haven't fixed the issue.  Any ideas?

Also, how often should I be replacing oil?  I've been doing it every 2000kms... but am thinking potentially more often?

 

Cheers guys/girls...

matt



Attachments
__________________
KiwiJeff


Senior Member

Status: Offline
Posts: 135
Date:
Permalink  
 

Hi Matt,

Looks like the common old Decompression Plug Seal leaking.
The Decompression Valve would normally go in there but doesn’t seem to be used on the TTR so it’s just “blanking Plug.”
The original factory Plug goes hard/brittle and loses its ability to seal up the hole and even if a little oil escapes, it spreads around and looks like a lot.
Totally TTRs Shop has an excellent “fix” for it with a machined alloy plug and an O Ring that can handle the heat created in the area.
My TTR had a same problem a few years ago and I fitted the TTR Shop Plug and haven’t seen a drop since.
Brian has an excellent instruction on how to removed the old Plug (I think in the FAQ section or attached to the Parts Shop where the Plug is shown).
Be very careful with the threads in this area as the castings are getting old and have had to suffer being very hot and cold over the years so are getting weaker.
Hope this helps
Cheers
Jeff


__________________
TTRfan


Super Guru

Status: Offline
Posts: 8606
Date:
Permalink  
 

Ali plugs available here

Replacement guide http://www.ttr250.com/Replacing_cylinder_head_oil_plug/TTR_oil_ali_plug.htm

And welcome to the forum biggrin 



__________________

Exeter, Devon, UK

http://www.ttr250.com  - The one and only dedicated TTR250 FAQ!  

TIP: For easy viewing bookmark the "Recent Posts" view - http://ttr250.activeboard.com/p/recent/ 
ontheroad


Newbie

Status: Offline
Posts: 3
Date:
Permalink  
 

Hey Jeff - thanks for the thoughtful reply mate. Really appreciated.

I've emailed the guys at TTR Shop and hopefully will have a reply soon.

Shiny side up!

__________________
ontheroad


Newbie

Status: Offline
Posts: 3
Date:
Permalink  
 

Thanks TTRFan!

I think now I eventually understand what's going on with the bike... haha..

Cheers

__________________
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.
The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Mystery oil leak from header pipe?


Create your own FREE Forum
Report Abuse 		Powered by ActiveBoard