Crank regrind

[Ben Beacock]

Has anyone had a motorcycle crank reground?
From what I've found, there are no undersize bearings so it would need to be welded then reground.
This all relates to a 2002 GSXR-600 with a spun rod bearing. The rod is toast, but the crank may be salvagable? I'm not experienced enough in moto engines. The dealer says we need a new crank, but are they biased into selling us an $800 crank, all the bearings, ect ect?
I have pretty pictures. I just need to resize them.

[Ben Beacock]

Notice the discolouration

http://uogracing.serveftp.net/images/PICT2218sized.jpg

http://uogracing.serveftp.net/images/PICT2219sized.jpg

http://uogracing.serveftp.net/images/PICT2221sized.jpg

[MikeWaggoner at UW]

I'd get a used on off ebay or something... They're up for $150...

[Tony K]

Yea, I'd be a bit hesitant to try and fix the old crank, especially with that much heat damage. I've seen crankshafts launch into multiple pieces in drag racing applications where people have tried to repair damage like that. Best to just cut your losses and find a new crank instead of taking your chances and having a window installed in the side of the block.

[Ben Beacock]

good ol' ebay. That being decided (with some other input as well), I'll definitely have to static balance everything(with one of the rods being replaced) but what would I be looking for when finding someone to dynamically balance the whole thing? Is it something that can be done on a regular crank balancer or does it need special equipment due to the high revs?

[GTmule]

Shoudln't matter, most (all?) builders only spin engines up to moderate RPM to balance them dynamically, once you find the right harmonic, balanced is balanced.