New transmission oil turned black after one week?

[vishanj]

Hi guys, I did a transmission oil change last week. Within one week the oil has turned black. When I open the oil filler cap it gives off a strong petrol smell as well. Why is this? I rode the bike for a total about 150-200km during this time (small road trip). I used the recommended 10W-40 Caltex synthetic oil (I'm from Sri Lanka btw).

[oldman]

Crank seal failure

[vishanj]

Hi, do you mean crank oil seals? Could it be that piston rings needs replacement?

[declan]

@vishanj no it’s not the rings it’s definitely the crank oil seals as you call them

[Irongamer727]

@vishanj it's not a 4 stroke mate. It's the seals that needs replacing. Not anything metallic, hopefully.

[vishanj]

@declan @Irongamer727 thanks mates, will look into that