crf50 swingarm bolt size

[motodevo]

Hi just wondering if anyone knows whether crf50's use a 10mm or 12mm for the swingarm pivot bolt. The reason i ask is i have a oddball chinky frame that takes a 10mm swingarm bolt and a swingarm that takes a 12mm. I know i could swap out the bushes on the swingarm for 10mm bushes, but i plan on getting another swinger anyway and was wondering if i should bother welding in a larger tube to suit a 12mm bolt or not. Is it a case that 12mm is more a chinese standard like using 15mm axles over 12mm axles for extra strength? Thanks

 

[MiniFighter]

Whats the O.D of the tube that the pivot bolt runs through? If its big enough, you may be able to run a drill through it to accomodate the 12mm bolt. If not see if you can change the bearings to something with a 10mm I.D

 

[motodevo]

nah, its not thick enough that i'd be comfortable to ream it out to 12mm. I'd rather weld in a new piece if i have to but am wondering whether a stock crf50 frame runs 10 or 12mm swingarm bolts, so if i go for highend crf50 parts later on i wont have any hassle.
Cheers

 

[bulldog93]

They're 10mm. I just went and checked.

 

[motodevo]

Thanks for that, wont have to scrounge through my scrap pile for a larger tube(and i'm out of gas for the mig).