Oil leak - Sprocket

[Jello]

The bike is now leaking oil quiet rapidly. It appears to be coming from the sprocket/ output shaft area.

Is there usually a seal there that could have worn? Or perhaps it's that I didn't tighten the left hand crankcase bolts enough on reassembly.
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Honda MTX 125

[MaybeGuy]

output shaft seal
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[befdelta7]

there is a bearing and seal that the shaft goes through, that could well be your problem,, dodgy seal or bearing.
sometimes due to having the chain too tight!
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Dont do a wheelie in front of a traffic copper... it gets you 3pts and £220 fine.

[Jello]

In that case, is there a method to replacing the oil seal without having to dismantle the left hand crankcase again?

I'm guessing the possibility of doing that is different with all bikes...
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Honda MTX 125

[Blau Zedong]

Engine splits vertically I believe so you should be able to change the seal from the outside. You'll have to pull it out with self tappers though.
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18:54:48 Rob Fzs: jews don't give away stuff for free

18:54:59 Rob Fzs: unless its their clothes/ hair/ golden teeth