Not in the budget at this time and it's already put back together. After starting this thread I decided the crank would be ok for the power I'm after. Don't plan to go north of 160/170. Crank work was quoted around $800 plus shipping and a month turn around time. If it blows up later than so be it. I could have done it but then I wouldn't have been able to afford the bigbore kit with the other goodies I need which would make the work useless. They'd balance, true, weld, and pin for the bigger pistons that I couldn't afford with the work so it didn't make sense. Hearing from other members making big numbers on their stock cranks I'm not too worried about it.

 

For another $800. you could have got a Dark Horse crank. Just the other day I saw a broken stock crank at my dealers machine shop. The shaft was completely sheared off at the output side. It had previously been welded. It happened in 4th gear on a 124" build. If I were starting a performance build today. I would start at the bottom.

 

To each their own, I think that money is better spent on a compensator sprocket and billet clutch basket which are known failure points on the M8. If I was planning a more aggressive build I would have bit the bullet and got the work done and waited till I had the money for the bigbore install. That very well could have put my bike down for the upcoming season which is not something I want to do. The past few months I've already dropped over 3k into it. I'm pretty much tapped for a season or two. Might do heads and TB next winter or the winter after, will just have to see if I want more power or if I'll be happy with what I've built.

 

Sorry Im soo late to the party.
I just rebuilt my 107 to a 124 using a Fuel Moto big bore kit and more 》10.75:1 Compression, CP Carillo Pistons, S&S under piston oiler nozzles, Woods 22XE Cam, S&S Oil Pump + Cam Plate + Lifters + Roller Rocker arms, Fueling 1 piece pushrods and 6.1g/s Injectors, OEM heads with OEM Valves second hand from a wrecked milwaukee 8 bike with 5600 miles on them, HD SE Plug Wires, Drag Specialties Iridium Plugs, Arlen Ness enhanced (+ size) air filter for HD OEM Air Cleaner housing (Oval - Chrome from a 114 edition Milwaukee 8), Revolution Performance 55mm M8 Intake Manifold, SPAL Radiator Fan mounted to the Oil Cooler with a simple on/off toggle, Dynojet Power Vision and Wideband O2 "target tune kit"

I am just starting the Thermal Cycle process to seat the Rings, I have an Appt for Dynotuning in a couple weeks.