WR450F Oil Pipes

[Thomas C]

Hi we're using a WR450F engine for the first time which we bought from a breaker so we haven't seen what it looks like when assembled on the bike. Our engine is 2007 so with the oil tank as part of the crankcase. I would like to know where does the pipe on top of the rocker cover(the one with the 90 deg bend) connect to as in the manual it's called a breather but I'm not sure if it is a breather or is it the main supply from the sump.

Also where does the pipe exiting from the oil filter connect to; is that the supply pipe for the rocker cover pipe? Looking at the lubrication system diagram in the Yamaha manual it appears to be connected in this way.

The pipes of interest can be seen in this photo on Delft's car Engine photo (http://dutracing.nl/wp-content/gallery/dut07/4.jpg).

Any help will be appreciated as I have checked photos/manuals but cannot see anything in this area.

[Thomas C]

I've added a photo of the pipe exiting the oil filter housing here

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[mech5107]

The pipe on the rocker cover is breather pipe. It connects with the one on the crankcase and should end in a catch tank.
I don't really understand what is the oil filter pipe you saying, but in early wr450 the oil supply for the head is feed through an external line, on the back of the head, near the inlet port. On later (07-08) this line is integrated to the engine.

Edit:
That in the picture is not the oil filter. It's the starter cover...

[Thomas C]

Ok thanks for the help.

[dazz]

Originally posted by mech5107:
The pipe on the rocker cover is breather pipe. It connects with the one on the crankcase and should end in a catch tank.
I don't really understand what is the oil filter pipe you saying, but in early wr450 the oil supply for the head is feed through an external line, on the back of the head, near the inlet port. On later (07-08) this line is integrated to the engine.

Edit:
That in the picture is not the oil filter. It's the starter cover...

Actually, it is the cover for the starter reduction gears.

Thomas,
Go to this site for an online parts fiche:
http://www.partforyamaha.com/p...ybrand/2/Yamaha.aspx (http://www.partforyamaha.com/pages/parts/viewbybrand/2/Yamaha.aspx)
Then find your 07 WR450F... Go to the INTAKE slide and part 41 connects to the hose barb near the starter, you can also see the Y connecter (part 43). Then go to the CYLINDER slide and look at part 20 & 21.

Online parts fiche are sweet! Check out the transmission on the Honda TRX680, proper torque converter, electronic shifting via clutch packs, imagine the possibilities. Now that Auckland has picked up where WWU left off with custom housings, will someone step up and build a state of the art FSAE auto? the sky's the limit! lol

[Thomas C]

Originally posted by dazz:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by mech5107:
The pipe on the rocker cover is breather pipe. It connects with the one on the crankcase and should end in a catch tank.
I don't really understand what is the oil filter pipe you saying, but in early wr450 the oil supply for the head is feed through an external line, on the back of the head, near the inlet port. On later (07-08) this line is integrated to the engine.

Edit:
That in the picture is not the oil filter. It's the starter cover...

Actually, it is the cover for the starter reduction gears.

Thomas,
Go to this site for an online parts fiche:
http://www.partforyamaha.com/p...ybrand/2/Yamaha.aspx (http://www.partforyamaha.com/pages/parts/viewbybrand/2/Yamaha.aspx)
Then find your 07 WR450F... Go to the INTAKE slide and part 41 connects to the hose barb near the starter, you can also see the Y connecter (part 43). Then go to the CYLINDER slide and look at part 20 & 21.

Online parts fiche are sweet! Check out the transmission on the Honda TRX680, proper torque converter, electronic shifting via clutch packs, imagine the possibilities. Now that Auckland has picked up where WWU left off with custom housings, will someone step up and build a state of the art FSAE auto? the sky's the limit! lol </div></BLOCKQUOTE>

Thanks for that link it should be useful.