Wildcat Forum banner

2015 wildcat surprise on the drain plug

2116 Views 11 Replies 5 Participants Last post by  J Paul
Well, just got the wildcat out for it's first run this year. decided to drop the oil afterwards since I've never changed it since getting it. (guy I bought it from had just done the service on it at his dealer) and I doubt we've put 30 hours on it in the two years we've had it. (yes, I know I should change it at least once a year regardless. anyways, the oil came out pretty clean anyways.

well, I wasn't too happy with the oil plug when I removed it. saw this sticking to the end of the magnet. so it looks like a roller from a bearing. any ideas from what? Motor seemed to run fine. only thing I can think of would be a wrist pin bearing from a piston that I'm used to from dirtbike rebuilds, but how in hell could it get out of there? something left over from a previous engine failure that the PO didn't tell me about? Now I'm scared about running this thing. it shows no damage on the pin at all, and like I said, the motor seems to run fine.




See less See more
1 - 12 of 12 Posts
okay, I've been through the diagrams on partzilla and other online diagram sites and no where in that engine case do I see a roller bearing like that. closest thing I saw was an ebay auction showing a starter clutch gear that looked like it had that sized roller but that's on the outside of the crank case in the magneto side so even if the bearing failed it couldn't have gotten inside the oil pan. Plus not even sure that was a correct usage since I see other auctions that show that starter gear with a bronze bushing instead of a bearing. I'm at a loss here....help!
Look through this thread. Its a pin from oil pump during assembly happens alot not needed and no harm.

okay, thanks for that. though...initially i'm happy it shouldn't mean anything, but then in the mean time I found a picture of the oil pump broken down and first off don't see how that pin could escape without some excessive wear on the flanges to allow that center pin to run in and out, and secondly, and more importantly, how would that rod connected to the gear/chain be able to turn the internal pump rotor without the pin in place? look at these pictures. I need to get an oil pressure reading off this thing somehow because if that pin is off, how is the pump internal gear turning? the inconsequential pin I see in these threads I would think is that tiny one that looks like it aligns the pump cover to the body and that I can see not meaning anything (but no way it could escape either) the big pin seems pretty important or I just don't understand how the pump works without it.


See less See more
I am curious about this as well. How does the pump still operate without that pin?
What I heard was it is a pin used durin assembly, not part of the pump
This might be one of those times I cant figure it out lol..... my brain says that pin needs to be through the shaft and sitting in the slot in the inner rotor and forcing it turn but.... whatever lol
Well, I'm not tearing it apart just to find out if it's THE pin or A pin. what I did do was find a cheap used pump on ebay for $25 that I just bought just so I can take it apart and see this for myself and compare the pin I got from the plug to the pin that's in that shaft. In the mean time I guess I'll just run a test light to that unused oil sending unit to see if the light goes out once the motor's running to prove there's some oil pressure. If it is some kind of pin "used during assembly" I sure would like to understand how and what it had to do with the oil pump. I don't see anything in the case, or pump that would accommodate a temporary pin, much less allow a pin to fall out anywhere in the mounting area of the case or body of that pump, or what it would have to do with anything since the pumps just free floating and really the only thing it needs aligning to is the water pump with it also drives, but that part is on the magneto side of the case and couldn't intrude into the crank case. Oh well, I'll post some results once that pump gets delivered and I can compare the pins.
See less See more
pump shows shipped, estimated delivery is Friday. I'm breathing easier though with the sending unit idiot light test it passed. it's got oil pressure when running so that gives me a better feeling that it's a different pin than the one inside the oil pump.
  • Like
Reactions: 1
pump showed up today.

final follow up, it's not the same pin. (and for the record, that pump functions as discussed, without that pin it wouldn't turn the rotor and zero possibility of it falling out short of a catastrophic failure of the pump exploding) in the picture, pin found on drain plug is the smaller one on the left, and pin from the oil pump is the larger one on the right.

probably the most expensive pin ever purchased, Now I've got an extra oil pump/tube/pick up screen I'll never need so if you need one for some reason, hit me up!


See less See more
it rotated the picture on me, so left = top and right = bottom
You’re very curious and resourceful! My condolences!
1 - 12 of 12 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.