I run them on my 'bus. Never a prob. 167rwhp and 60hp N2o....
I am going to build my own extended arm this winter though. As I plan on a Turbo or a jump up to 125hp N2o over the winter. And I'll just feel better with a built arm, rather than extensions at that point.
And HEY, sorry i couldn't make breakfast this morning...had to work on a buddies bike last night...
Uhmm, I don't remember really... these actually came off of egay. I got a set that came with the optional caliper bracket. So i did not have to extend brake arm. It's no longer needed now.
Pay very close attensions to what I am about to say. DO NOT BUY EXTENSIONS OFF OF EBAY!!! Bolt on swingarm extensions should be made out of Billet 6061 aluminum or strongerm. There have been soe sellers on ebay that make their extensions from sub standard aluminum. You have been warned.