I too am interested in this.

 

At that level I'd have the crank plugged and welded, and I'd have the entire rotating assembly balanced.

 

We expect this combination to be within the reasonable threshold of what is still considered reliable with the stock crank. It really comes down to shock load on the crank which is greatly determined by how the bike is driven. If you are doing high RPM launches or wheelies you will likely want to consider having the crank serviced, on the other hand when we were durability testing last year we made over 150HP/135Tq and pounded the bike on the street and at the drag strip with a completely stock crank and did not have any issues.

 

In the next several weeks we are going to increase the compression a bit and swap out the TW-555 cams for the Wood TW8-6. This combination should very likely make 120+HP/130+TQ we will be using the stock crank

 

Uh, yes, I'll have what he's having.

 

Price is looking real good, I'm just going to wait a little bit and see what the compression and cam change do, and durability and characteristics of the engine results, from what I see so far I'll be setting up a time and road trip, I know it's a long way but I plan to spend some time in Ill and Mich anyway, so if I can knock this out in the same trip, great.

 

I know of one 107 that twisted a crank (not a FM build). But then again this guy was know as the wheelie king! (350+ pound man) That bike was beat constantly for just over 28,000 miles before she gave in. Maybe a "normal" rider would never have a issue.

 

Now I'm just wondering would it be better also if you added the SE 58mm throttle body and hi flow injectors, or would they be needed. Will be still viewing all results and reading why you do or don't add to the intake, and if it would make a substantial difference.

 

Jamie whats the flow rate on your heads.

 

For reference, I'm running an HPI 55mm and high-flow injectors on the 103 build in the Night Train. I don't know what the stock injector flow on the new bikes is, but I'm guessing that they'd be maxed out at or near 120/120.

And with all due respect to Jamie, a stock crank may work for a while at elevated power levels, but I sure wouldn't risk it much past 115 ft-lbs of torque.

My point being that if you want to make reliable power, you have to beef up everything, not just the sexy parts.