100 hp KZ650

What 750 race bikes? As far as I know the Suzuki GSXR 750 killed 750 racing, they were winning every race. Kawasaki doesn't even make a 750 sport bike any more.

Today, the GSX-R750 is the only sports 750 left (not counting the very expensive MV Agusta). The class was left obsolete by a regulation change in the 2003 World Superbike Championship that allowed four-cylinder bikes a 1 000cc capacity, instead of the usual 750 cc. Unable to keep pace with the 1 000cc V-twins, the Japanese lost interest in racing and subsequently abandoned their 750s.

But continuing to build a 750 sportsbike when the other manufacturers had stopped bears testimony to Suzuki’s commitment to keeping its heritage alive. In its latest incarnation the GSX-R 750 remains true to its original brief - to bring the racetrack experience to the street.

LINK



Unless you are talking drag racing, and even there a 200 hp non turbo 600 or 750 would have about as much in common with a street bike as Lorcan's new 1500cc Pro drag bike does.

You have a link for this 220 hp 750?? That's close to Formula One technology (1500cc 600 hp)


To get that much horsepower out of a 750 without nitrous or forced induction means you are going to have to turn it to at least 18,000 rpm.

SportBike magazine had a 600cc shootout 2 years ago, Yamaha R6 was the winner at 112.1 hp.

Another Link





Let's get back to real life street bikes

And I think Lorcan is still the champ there with 250+ hp (rwhp) out of his GPz750/810 Turbo

My HD runs consistent 12.2's in a quarter so I would wish you luck.

Sorry mods, but I couldn't resist. Kawis rule!

Hagphish wrote:

My HD runs consistent 12.2's in a quarter so I would wish you luck.

Sorry mods, but I couldn't resist. Kawis rule!

How about an (almost) stock GPz750 that runs high tens? Only mods are a K&N air filter, muffler removed, and a resister soldered in the wire harness















85 GPz750 Turbo.


I really need to stop screwing around and drill a hole in a piece of glass so I can cc those heads

Almost any bike can reach 100 hp plus. Its a matter of na vs. Forced induction.

I really hope to be close to that number with the "bigish for 810cc" 36mm throttle bodies and some good head work.

But it's probably wishful thinking.:laugh:

kxhonda wrote:

I really hope to be close to that number with the "bigish for 810cc" 36mm throttle bodies and some good head work.

But it's probably wishful thinking.:laugh:

Well, I guess you and I will find out, won't we

I broke the only piece of glass I had that was the right size when I tried to drill the hole in it, so I'm back.

Did take some pics of both 83-85 GPz and 80 KZ750 combustion chambers though, guess maybe I ought to post them.

Top head is KZ750, bottom head is 83-85 GPz750

Yea, I wouldn't mind seeing the diff between the two chambers.

I have few pieces of lexan laying around at work I'll grab and get some cc numbers on the kz750 head.

Close up of two GPz750 chambers, click on the pics to blow them up to "huge" size (1600x1280 or something like that).

80 KZ750

Hmm, kinda seems like the angle leading into the chambers would really screw with the squish area. Almost seems like that chamber wouldn't be as efficient as the KZ's perfect hemispherical chamber. Where's LarryC when ya need him?

12.2's, thats really fast :S

dont the kz650s run low 12's from factory?
or is that the kz900!!!