So when i dismantled the bottom end a few months ago i mistakenly left the crank exposed.

Over the last few months its gained some surface oxidisation which easy came off with a cloth and wd40.

Will i need to replace this or get is professionally polished again ?

There is no pitting or scratches that i can feel although you can see discolouration in a few areas.

 

Hi Lee,The crank is very hard and i would be amazed if the corrosion has bitten in yet.Grab a roll of 180 grit emery and polish it at home then coat it with oil to stop it rusting again.

Thanks,

I've coated it with oil for the moment and i'll order up some emery cloth. ?

Would you need to balance it again though ?

wouldn't think so as its just a polish to the areas that come into contact with the bearings

Not enough material would come off in my opinion.

1 hour ago, JaiKai said:

wouldn't think so as its just a polish to the areas that come into contact with the bearings

Not enough material would come off in my opinion.

I'm with Jimmer too - and also agree with you regarding no need to balance it. Just a mild polish, to smooth the bearing surfaces, no material would be removed at all.

Hurry up and put it in the car, I want to see (and chase!) your car in the flesh!