yamaha aerox 50 water leak

hi there my aerox 50 has a water leak coming from the middle of the crank cases and was wondering if anyone could tell me whats wrong with it or how to fix it ? and it will go 50 for a bit then it will die off to about 30. what could that be ? thanks

 

Is it a complete engine rebuild ? and what new parts would I need to do it ? Thanks

 

Parts wise, probably just a new crank gasket (you could also use threebond). You'll also need new oil seals, crank bearings a top end gasket set. Tools wise, you'll need the usual sockets, etc. a flywheel puller and probably a case splitter too.

 

ok mate thanks for that. is there anything else i will need apart from that ? thanks for the replies very helpful. thanks.

 

I think that's everything. BTW, I meant crank case gasket, not crank gasket.

 

they dont have case gaskets, you just use instant gasket or a waterproof sealant.

TOOLS:
socket set
screw drivers
allen keys
circlip pliers
rubber mallet
flywheel puller + holder

PARTS:
crank
Main bearing + small end bearing
crank seals
top end (depending on condition)

cost me £160 for parts + tools so not too bad