GSXR 750 cams in a 750

[bigmatthew46]

Has anyone put GSXR 750 cams in their 750 Kat. I know they will work I'm just wondering if you can expect the same type gains as putting them in a 600?

[arsenic]

look at the lift durations, you tell me if they are better

http://katriders.com/vb/showthread.php?t=75466

BTW a 10th of a mm DOES make a difference.

[KatScratchFever]

I asked Ivan about this before purchasing his kit and he said (basically) that one needs to decide whether they want low/mid power or high-end power. I opted for the low/mid power since I'm driving on the street, not the track (where high-end-of-the-RPM-band power would be more desirable).

Basically Gixxer cams would "fight" the benefits of the Ivan's kit and other typical Kat mods that yield better performance in the low/mid range.

If you want, you could always swap a GSXR engine into the Katana. . .

[loudnlow7484]

I asked Ivan about this before purchasing his kit and he said (basically) that one needs to decide whether they want low/mid power or high-end power. I opted for the low/mid power since I'm driving on the street, not the track (where high-end-of-the-RPM-band power would be more desirable).

Basically Gixxer cams would "fight" the benefits of the Ivan's kit and other typical Kat mods that yield better performance in the low/mid range.

If you want, you could always swap a GSXR engine into the Katana. . .

With the exception of the cams...... you already have a gsxr engine in your katana. The pre 750's are just that. And supposedly (from some old gsxr guys) the 98+ 750 motors are like an even better version of the 1990 GSXR750 engine, which was arguably the best oil cooled 750 motor. Fix up the valve train, and you've got a seriously badazz motor.

[arsenic]

I asked Ivan about this before purchasing his kit and he said (basically) that one needs to decide whether they want low/mid power or high-end power. I opted for the low/mid power since I'm driving on the street, not the track (where high-end-of-the-RPM-band power would be more desirable).

Basically Gixxer cams would "fight" the benefits of the Ivan's kit and other typical Kat mods that yield better performance in the low/mid range.

If you want, you could always swap a GSXR engine into the Katana. . .

Ivan's kit with GSXR cams is kinda crap, you need a Factory Pro kit for gixxer cams to work right.

[bigmatthew46]

I've got pods & a DJ stage 3. Did that before I found this site. Needless to say I'm pretty much top end. I have seen that the pre 750 made more power than the 98+ is that right? I think I would go for the 89 exhaust cam. A 771 kit would be sweet anyone have one of those?

[arsenic]

no, but the pods and DunoJunk stage 3 would work a whole lot better with GSXR cams

[KatScratchFever]

Good info. here as always, thanks for that.

I'm gonna' give the Ivan's a whirl for a bit and see how I like it. I imagine it'll be quite nice for street driving (might re-do the sprocket too in order to give a little more "oomph" down low, but we'll see).

Eventually if I want to wind it out I think I'll look into one of those factory pro kits.

[loudnlow7484]

I've got pods & a DJ stage 3. Did that before I found this site. Needless to say I'm pretty much top end. I have seen that the pre 750 made more power than the 98+ is that right? I think I would go for the 89 exhaust cam. A 771 kit would be sweet anyone have one of those?

As far as my knowledge, I believe the pre 750's made more power than the 98+ when stock, or lightly tuned. The 98+ 750's have potential to make much more power. Just look at the 88-89 gsxr750's..... they were fine on the street, but they just didn't cut it in race form. But in 1990, when they went back to the long stroke, and different heads, the race form was far better. (The 1990 GSXR750 is very close in design to the 98+ Katana 750 motor)

Somebody here is running a 771 setup, but I don't remember who.

[bigmatthew46]

Would it be worth it for me to ditch the Dyno jet & get the Factory Pro? I think I'll do the cams in the near future.

[arsenic]

not if your running pod filters. There is no Factory Pro for pods. There might be for pre 98's you'd need a stage 7 kit, check it out. I know there isn't for 98+. If you'd FILL OUT YOUR GARAGE I wouldn't have to ask this AGAIN what year? If it's a pre this kit works. CRB-S12-3.0

[GregS]

But in 1990, when they went back to the long stroke, and different heads, the race form was far better. (The 1990 GSXR750 is very close in design to the 98+ Katana 750 motor)

Problem with this logic is the 98+ motor is the short stroke motor.

As far as jet kits are concerned, Ivan's is a low and mid kit. Personally the 750 makes plenty of low end power so having a jet kit that improves low and sacrifices high is a waste. The Factory Pro kit gives great throttle response low end and increases top end. The DJ kit just floods the motor with fuel and is good for bench racing but fails in the real world.
Now everyone, Flame On.

[arsenic]

STROKE:
pre 98 750
44.72mm
98+ 750
48.7mm
now would you care to explain how that is a short stroke motor
just because I have nothing better too do.
STROKE
GSXR 750 85-87 and 90 on
48.7mm
GSXR 750 88-89
44.72mm
so by all means go ahead and tell me I'm wrong, but your logic is NOT gonna beat the manual.

[loudnlow7484]

STROKE:
pre 98 750
44.72mm
98+ 750
48.7mm
now would you care to explain how that is a short stroke motor
just because I have nothing better too do.
STROKE
GSXR 750 85-87 and 90 on
48.7mm
GSXR 750 88-89
44.7mm
so by all means go ahead and tell me I'm wrong, but your logic is NOT gonna beat the manual.

Nor the knowledge of the many who have disassembled said engines. I have one apart in the basement right now!

[FastJetta97]

man i really wanna get and instal this 89 gsxr 750 cam in my 750 and see what happens.... im guessin i will have to do a serious jet kit... but i think it will bring the kat to life....