Brand new top end rebuild, oversized piston + skimmed head a barrel, not a cheap job at all.
Obviously cheap head gasket isn't doing it any favours but would that be the cause? possibly incorrect fitting? Bike hasn't even covered 1 mile just overheated as soon as it was put back together.
I've now been lumped with it, going to skim to re skim the surfaces and get a genuine gasket hoping that a whole new rebore isn't essential.
Bearing in mind it was all fresh and has only been ran for a few minutes tops on idle and low speeds it's quite worrying really.
-- Edited by Harry on Friday 16th of November 2012 08:08:48 PM
that sucks ass gasket hasn't taken at all. looks like its done 20,000 miles all at once dont it? if the petrol/oil went that far into the head its safe to say coolant went the other way.
Exactly what I'm thinking too, can't say head gasket failure it clearly never worked in the first place :(
I only want to get my money back on it really, wanted to have as a spare engine but if it needs this much work doing may as well just rebuild mine when it breaks
My mate had the top end rebuilt by PJs in Wolverhampton, I think they just did that then he got one his mates to put it back together. Don't worry one of the engine bolts had stripped and the head mounts have got complete awol so yeah not the best fix ever...
I bought it knowing full well it was overheating but didn't think it was this ****ed after well what... no mileage? (Just bought the full bike off him he couldn't be arsed with it)
Chances are it wasn't bled mate, considering the other bodges tbh. That combined with a non working gasket isn't a good combination. Shame it was literally a brand new rebuild as well...
If it was my engine to ride I would just get it fully rebored, new piston and skim no ****ing about but the thing is I only bought it to fix and sell. If I go down this route I'm going to make literally no money so I don't know the best thing to do.
-- Edited by Harry on Saturday 17th of November 2012 07:12:36 PM
You might and I'm talking very slim chance get away with a new piston rings lots of mineral grade oil for 200 miles. I'm talking about real cheap oil and it might just bore it away. So long as its getting oil. But it won't be in tip top condition. You'll lose compression!
that piston has had a multi point seizure, to quicker warm up and the piston has expanded quicker than theo bore by the look of the scour marks on the piston, or lack of lube, but its knackered, and the bore wont seal proply due to the vertical wear marks... will need honing out atleast to get a good seal
and you can tell that head gasket has been blowing all way round due to the black carbon, no carbonisation should occur past the outer edges of the bore
looks like over oiling to me and like norf said that gasket was blowing all around, when that engine warmed up it would have blown all the water out of the raidiator / expantion bottle pretty fast but failed to notice wich resulted in extream heat seizer that bad the the piston has hit the ports
That barral is probs buggerd id be looking to get it resleeved
id be doin a complete engine rebuild as all it takes is a tiny bit of piston in the big end or floating around down there some where then your bk to a nackerd motor and wasted money
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I GO TO WORK I FIX BIKES, I GO HOME I WORK ON BIKES, I GO TO SLEEP I DREAM BIKES! HEELLLPPPP :)
Yeah that's what I was thinking no way a headgasket should look like that unless it's had a complete failure
I'm saying no oil personally but it's hard to say
the coolant injested by the piston moving down sucking it in the chamber also washes the oily film off the parts causing no lube, if the top end is that bad i wunt be not checking the bottom end of the engine, if its that bad up top its probly dont the big end and mains 2
expensive mistake, genuine head gasket for £16 or full engine rebuild 100s..lessons learned the hard way im afraid
very comon with pattern headgaskets its hit and miss just need to keep checking the raidiator water when cold if there gonna go its normaly with 200 miles of a rebuild ive found
use a genuine if able if not be prepared to do it again and use proper torque specs!!
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I GO TO WORK I FIX BIKES, I GO HOME I WORK ON BIKES, I GO TO SLEEP I DREAM BIKES! HEELLLPPPP :)
I was given a head gasket on my very first rebuild. Told it was genuine. Soon figured that it wasnt give minutes down the road. I was exceptionally lucky that the engine didn't give in. God knows the damage it's done. But when I rebuild it it's going to be done to the T.
Spend about 3 months getting it spot on I reckon. Might buy a lump to practice on.
just take your time dont rush and do your research its all pretty easy, just gotta make sure it all goes back right and oil everything well for first start up
Bleeding the oil system is very important, bleed at pump screw then start the bike and put oil pump on full till the bike smokes alot more
I always run the bike up on a remote tank with some 2t in
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I GO TO WORK I FIX BIKES, I GO HOME I WORK ON BIKES, I GO TO SLEEP I DREAM BIKES! HEELLLPPPP :)
gasket hasn't taken at all. looks like its done 20,000 miles all at once dont it? if the petrol/oil went that far into the head its safe to say coolant went the other way. 
