So I dropped off a set of 103 cases I picked up to the machine shop, going to do timken conversion, darkhorse crank, cases will be machined and it will be a 124 when its all done. Builder says 140+ hp but we'll see about that. My questions are, what other components do I need to upgrade to support that sort of horsepower? I don't want to slap this thing in, break it in and then put a beating on it and start breaking all sorts of parts every time I take the bike out. Id rather put a shopping list together and get everything I need, or most everything atleast so I can swap engines and do everything all together. It will be a winter project so I should have everything by then. Other question is, builder is recommending thundermax tuner, which is fine I dont mind paying the money if its worth it. But correct me if Im wrong, thundermax is sort of old technology now isnt it? Compared to whats out there today. He swears by it, says it will be best tuner for the build. I didn't question him he's very knowledgeable but I'm just looking for peoples opinions who have been here before. Trying to cross my t's and dot my i's with this thing. Any help would be great, thankyou.

The bike is a 2014 so it has a 6 speed, he said something about a bearing in the tranny not getting enough oil. Not sure if that rings a bell for anyone. He also mentioned s&s castings for heads with his port/valve job. Its a complete build starting with literally just a set of cases EVERYTHING is being installed new. Not a single part/bolt being re used. I just bought a set of bare cases so I can keep riding the bike now while the new engine is being built. Whats the long list of parts needed to support this thing? Anyone recommend a set of cams to pair up with heads flowing 300cfm+?