Seized FE450, rebuilt now no oil flow

Hi there, i was hoping to get a bit of help from you guys in relation to my Fe450 2009 model.

I recently burnt our my clutch due to some pretty harsh abuse in muddy conditions. Long story short, replaced the clutch and oil and then 15 minutes after that on a new ride the bike seized. The bike would still turn over but had no compression.

Upon stripping down the motor we noticed the piston and bore had seize marks. We cleaned out the sump of all debris and assumed that an oil blockage and lack of oil feed had caused the top end to overheat and seize. We replaced the cylinder and piston and rings, blew out oil lines, replaced cam chain while at it as well.

Put everything back together and back into the bike.

Before starting the bike i wanted to make sure i had good oil flow, so filled her with oil, pulled he plug out, removed the banjo bolt and line that comes out of the rocker cover area and turned it over for 10-15 seconds. I was expecting to see some oil come out of the this hole where the banjo bolt\line connected, but nothing at all. ??? So i waited then cranked it over for another 10 sec, and still nothing.

Should i be seeing some oil come out fo this hole? Looking at the oil circuit in the manual it appears it should. I'm reluctant to start the engine until i'm sure i have proper oil pressure. Can anyone help?????

Davo said:

I'm not 100% sure but I think that Oil Line and Banjo Bolt in the head are there only to suck oil out if you are going down a very steep hill and the angle of the head is no longer pointing down and the oil cannot drain back to the crankcase via the normal route down the big hole where the Timing Chain goes down.

I can pop my Banjo Bolt out and start my bike if you need me to double check? It needs an oil change anyway.

You can just see the Banjo Bolt and Gauze Filter in this picture and the big hole where the Timing Chain goes down.


Davo.

Click to expand...

Cheers for the responses. From what i'm told by the local Berg dealer that line is for suction when you are heading down hill. Interestingly this morning there was a small pool of oil (fresh new oil) on the floor directly under where the banjo bolt hole is. So i guess i'm feeling more confident oil is getting up there to those small squirters that spray the cam etc.

Hopefully i have blown out the crap in the squirters that spray the crank\under piston sufficiently.

Start up tonight and will report back.

Well rebuilt it all. New Cylinder, piston kit and timing chain. Put it all back together and started her up. Sounded good but I was a bit worried so i paid the local shop to test the oil pressure. Luckily they did as pressure was down, they blew more debris out of the oil lines, put it back together and tested good oil pressure. Anyhow, i took i for a ride and 3 laps in on the local track and engine locks up\cuts out!!!!!

I cant believe it. I let it cool down, and it starts again. no problem!! Rode it slowly back to the trailer and took it home. Started it again today just to check i wasnt on drugs and it runs and idles fine (in the shed). So i dropped the oil and the filter\screen on the drain bolt was jam packed with more clutch debris crud. Cleaned that off and replaced the paper filter and put new oil in.

Ran it again and took it for a small ride. Dropped the oil again and only a small bit of crud was on the drain bolt filter. Cleaned it off, filled her with oil again.

So hopefully all the crud is gone for now, but my concerns are;

1. If i have seized the bike after the rebuild, how the heck is it still running ok?
2. Would starving of oil due to that little filter being blocked be the cause of the lockup\seize
3. How do i confirm that it wont lock up again? Pretty dangerous really.

Ok thanks for that Rensho. I have never thought of running kerosene for a flush out. Good IDea.