Those numbers look like there's headwork involved to me.

 

Agree.

 

Not me, my godson with his GF on it. His passion is bikes, does track days regularly, owns a very successful business and
his EGC is just about the slowest one in his garage full of bikes. Seriously ......... Hwy 111 from the I-10 freeway toward
Palm Springs is 4 lane divided, has a real nice flat, straight section about 3 miles long that folks play games on and not
just bikes.

 

Your Godson does track days with his bikes (so do I) great-and I guarantee never, ever, is a GF or passenger allowed run down the drag strip or Laguna Seca curves sitting behind him holding on to him for dear life at a buck 140 plus on any, any of his bikes.
Fact. No sanctioned, legal track would ever let that happen. Why? Take a wild guess...
I know that area well (live in SoCal), but I would never, ever take a passenger on any double or triple digit runs with me anywhere, anytime. If I want to risk death on public roads at 140, 150 mph or more (I wont do it), no way in hell would I risk the life of the passenger on the back as well. Stupid, selfish, unaware, you name it.

Sounds like you like to toot his horn-(Big business, many fast bikes, his HD is his slowest bike-lol)
As far as him owning or running a business.....who gives a ****? What does that have to do with the cost of tea in China? BTW, if he has a street Harley he actually thinks is fast, PM me (or better yet, have him PM me). I would love to run him on any track of his choosing. His GF can film us from the spectator stands.

Go to Liveleak and look up high speed motorcycle crashes...lots of them but the GF who was on the back of the sport bike at over a buck 120 when the rider went down into the guardrail might be something to learn from (or not).

 

How did this thread about a 124 build turn into a pissing match about who knows racing and who doesn't? How about we stay on topic? Sheesh!

 

PM each other...
Let’s get back to Blackstreaks build.

 

I am running the HD heavy duty clutch spring and hope it holds the 124" power. No headwork or anything really fancy. Figuring around 140/140. Any thoughts if it will hold or not?

 

Seriously i really don't think that your gonna see 140/140 without head work.... (Or anything fancy) your talking 1.13 hp/TQ per cube. That takes money and heads.......

 

[QUOTE=98hotrodfatboy;16731069]Seriously i really don't think that your gonna see 140/140 without head work.... (Or anything fancy) your talking 1.13 hp/TQ per cube. That takes money and heads.......[/QUOTE
Ok the question was about the clutch. As far as power output we shall see. I have seen 136/139 without headwork on a left alone S&S 124" 10.8cr 640 cams. I said around 140/140. Not going to get into internet forum power pissing match. Thanks.

 

[QUOTE=Blackstreak;16731111]I'm not looking at a pissing match. 10.8 is more than "nothing fancy" that's all I'm saying. Not Looking at a pissing match either... Good luck...