Wont rev past 6k and brown oil

[Ayrton]

Thanks I didnt see that page of the manual, at least i'm not going to snap it again now.
The cylinder does look a little more polished in person but its not super shiny. Theres no bits in it and I think those droplets are just some water/ oil mix that splashed inside while I was trying to pull the cylinder off.

I've got all new gaskets and stuff turning up soon. Guess I just need to try it out and see if it's still any good.

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A couple of tips. The base gasket surface looked to have traces of an old green fibre/card gasket. Clean this off with a stanley blade held at 90 degrees to the surface.

Also, whenever I put a new head gasket on a liquid cooled bike, I smear a very thin layer of Yamabond or Threebond onto the metal head gasket, by putting latex gloves on and smearing a very thing coating all over both sides with my finger and thumb, just before fitting. With this method, I've never seen a head gasket leak after fitting.
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TZR250 2MA road, TZR250 1KT road, TZR250 2MA race, TDR250, YZF-750R Boost colours.
Jaguar S Type 3.0 V6 Sport R, VW Transporter T5 GP LWB Shuttle 140ps DSG.

[bikenut]

And make sure all threaded holes etc, in alloy are clean all the way down to the bottom, with no chance of any sealer getting in there.
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nuts about bikes

[Ayrton]

So i've had the day off to put this back together now i've got a torque wrench that goes low enough.
What do you guys think of this scoring on the piston? Couldnt see it with it in the engine before.
https://imgur.com/a/yEYyn4J

Also now the head and everything is on the camchain sprocket doesnt turn along with the engine. I guess the chain has come off on the bottom sprocket or I havnt put the tensioner guide rail back in right. Only way to really see that is removing the alternator rotor, but I dont think I have the tools for that right now.

[Ayrton]

Ok so I bought the right tools to remove the flywheel and found the chain has slipped off. Carefully put everything back together and it seems to run pretty good now. Smoked a little on startup, but that went away after a minuite and it revs nicely all the way up. Still need to give it a run around when it's not so dark to test it properly.

Thanks for all the help everybody

[Riejufixing]

[Ayrton]

Thanks will do. I think the plan is to ride it a bit and then drain the oil anyway to get rid of some of the old oil I noticed was still lurking about inside.
Will have to start updating my show & tell thread too

[Ayrton]

Ok so bit of an update. I finally got everything back together and went for a quick test ride and go about as far as I did before until the bike started sputtering and when I stopped it stalled just like before, so I guess it has the same problem. Pushing it home wasnt nice.
I'm at a loss on what could be causing it this time, I definetly tightened everything to spec. Only thing i didnt do was use some sealant for the cylinder head like some of you guys suggested.

I'm thinking i'll just get a new engine or maybe just a bike with a mot and sell this one. I've got my theory in a few weeks and just want something to ride around on for a little bit of practice before I do my full test.

[Easy-X]