engine rust normal

[offroadrcguy]

i was changing the carby on my trx2.5 and i noticed rust or something like that in the opening of the engine after taking out the carby. is this normal. the engine starts and runs

 

[Chubaka]

I'm assuming its on the crank? Mine get a lil rusty here and there. I live in a hot humid area and that makes it rust, the fuel doesn't help.

Is it surface or flaking? Flaking could kill the motor if big enough, surface dhould be fine. A dremel and buffing pad with some 3 in 1 could fix it if you have anxiety over it.

Do you do after run?

 

[offroadrcguy]

yes