LEAKING A TUN OF OIL BEHIND POINTS, FOUND SOMETHING....

hillhudson · Post by **hillhudson** » Sat Mar 05, 2011 9:06 pm

Hey all, so i know there is a thread somewhere here about leaking oil at the points mount but i couldn't find it to post this. i almost started my enigne a while ago before a huge amount of oil start pouring out from behind the points. i thought it was deffinitely a seal that needed replacement but i looked behind the points today and found somthing that doesn't look right. this is my only cb77 so i don't have references to look at, take a look at the picture below, i circled a huge gouge thats in the top end cam mount. i am not entirely sure, but i think the oil was gushing from there. does this look normal ? maybe i had a bad gasket on the points bracket...

just to let you all know, this bike has been sitting for a long time and i intend to restore it, but of course i had to see if it would start.

thanks,

-hill

teazer · Post by **teazer** » Sun Mar 06, 2011 1:51 am

That's the way they are cast. If the oil is spewing out behind the points housing it's because the cover/housing is not flat against the gasket.

It could be the cam is slightly separated so the bearings are now too far out, or a torn gasket. Try bolting the end cover/housing back on without teh gasket but don't overdo it. See if there's a gap between the head and housing and if so try to determine why.

I had a motor once in which the points housing would not sit down until we machined some off the "nose" where it pushes on the cam bearing.

hillhudson · Post by **hillhudson** » Sun Mar 06, 2011 2:16 am

phew! i'm so glad that the top end isn't trashed. i was almost sure the guy i bought it from hacked it up trying to do a half assed rebuild. thanx so much for the input, that a load off my shoulders, i tried seating the points mount flat against the engine case and it does have something preventing it from being flush, and also a trashed gasket.

thanx a TON teazer!