Have any of you had this happen on a WR450?
Posted April 12, 2004 - 05:09 PM
What I found was there is a plug on the front side of the cylinder, to the right of where the exaust pipe mounts, that somehow came out.. I think it is on the exhaust side of the valves but not sure. Under idle, the port pulls air in, likely because it opens a closed circuit under pressure. But it also must work in the opposite under revs and blow air / oil by, thus the oil loss.. I found by plugging it back off under idle my suspected engine noise goes away, thank God. Parts book calls it a " Plug ". Weird deal.
I was also using an approximate 70/30 race gas mixture, but I don't think the high octane gas was the cause. Anybody else seen this yet?? Thanks, Dirtstiff.
Posted April 12, 2004 - 05:23 PM
Posted April 12, 2004 - 05:51 PM
Posted June 28, 2010 - 10:04 AM
Posted July 04, 2010 - 04:58 PM
Posted July 05, 2010 - 01:08 PM
Posted July 09, 2010 - 06:03 AM
Ah, now if only TT still carried the plugs. I looked for them, didn't see them so I called and was told they no longer make them. Modquad.com has one for a 2004 YFZ450 quad though. I wonder if the heads are the same? http://www.modquad.c...products_id=876
Yes that one will work. A lot of guys have used an 18mm freeze plug bought at a local auto parts store. Either one is much better than the stock rubber plug.