how to raise max RPM's

I am sorry if it seems I am ungrateful.

I am honestly thankful for all the good information given in this thread. It just seemed to me that raising the rev limits is a way of increasing power that is little thought about.

I was just looking to pick more knowledgeable peoples brains.

I am not really appreciative of people saying don't do it, or buy a new bike, because those posts are non-productive.

The thread was started so I could learn what are the reasons the rev limit is 9,000 and what limited it to that level.
Valve float was not mentioned and I was surprised but piston speed and rod stretch were.

Then I was informed that these motors could not make power there, for design reasons however I still don't understand that so well. I believe someone mentioned that the 2 valve head cannot flow enough, and when made to it becomes a very peaky/ hard to ride engine.



My personal goal, which is different from the discussion in the thread (because I am trying to look at many different power adders) is to build is a streetable (and still easy/fun to ride) 100hp kz650. It will not be 650cc's by the time its done, and it may or may not go turbo. I have no problem taking years to collect the parts and put it together right. Also if it red-lines at 9g I am alright with that. I am just asking questions to learn how to make the power, and why rpm's are not a commonly talked about part of the equation.

I will not be satisfied with simply going to 810 and excepting that as the final end all for a kz650 based engine.

I have always been a bit of a hard head, but please understand I am only saying the things I say because I do not fully understand the reasons involved. I do not mean to offend anyone; and I am not taking offense to your pokes at me... I come to this forum to learn about this bike and it's powerplant... not to piss folks off.

Says on utube that is is a plastic air induction piece. Sure looks like a piston to me.

Here is his web site. Check out the video on his first time out run. Roy


www.brocksperformance.com/media/gadson_crash05.wmv

not to get yelled at again, but to plumen I was under the impression (and this very well might be wrong and if so please gently let me know...my asbestos boxers are hot enough already) that the z1 style motors had an rpm limit based more upon the roller bearing cranks than anything.

So yeah there are no con-rod bolts to stretch, but at some rpm those roller bearings would stop rolling as meant and spin out.

Now this is something I heard from a very well informed man, who has owned more than one z1, with a dra racing background, and currently owns a turbo z. I won't use names because if it is deemed wrong I do not want to be the one to mis-quote or spread information taken out of context. SO again if I am wrong then please don't set my balls on fire for it!

What would happen if you stuffed the biggest piston in there u could get then added alot of weight to the crank and turbo'd the assembly. Wouldn't it launch like a rocket and have the momentum at shift points to carry on like one? It seems obvious torque is the quickest way to the finish line once again. Are we doing all wrong here? We already know these engines won't turn the rpm of newer desighns. Is the flywheel affect only for the Harley's? Why would the engine need time to spin up when the bike is revved before the clutch is engaged? Ok I hereby challenge anyone and everyone out there to cut this theory to PIECES. To me it's all about how can one make the wheel turn harder. More weight in motion vs more motion. I don't think the answer is taking an itty bitty motor to 20,000 then only having to squeeze the crank between your fingers to stop it instantly.