62mm crank whats required?

[peter357bikes]

Thinking of going up to a 62 mm 110 (GT) crank on my RB250, currently runs a 60mm 107 rod, as I may be getting one of the new engine cases. What else would I be needing to do and or consider...and before i am asked, what will this achieve?

[peter357bikes]

Going with the new GT case. Thanks for the info. May get the 2016 RB monoport barrel (longer), so may remove the need for large spacers. and with all the original bits I have, I can sell on the original RB block virtually complete to fund the process.