Mods for the biggest HP gains=GPz550

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03 May 2007 11:54 #136815 by vintage1
Mods for the biggest HP gains=GPz550 was created by vintage1
What are some modifications for the biggest HP gains to be found in the 84-85 GPz550 other than exhaust and pod filters. I figure porting the intake bowls and enlarging/smoothing Int/Exh passages should help.

R.C.

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  • wireman
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03 May 2007 15:09 #136864 by wireman
Replied by wireman on topic Mods for the biggest HP gains=GPz550
i think the gpzs already have a pretty decent head right out of box and hogging things out is not always the best thing to do,you end up loosing power if not done right.id say to see if you can find a set of drop in style cams and maybe tweak you carbs a little;)

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03 May 2007 21:47 #136963 by loudhvx
Replied by loudhvx on topic Mods for the biggest HP gains=GPz550
Wiseco 615 kit.
Like Wiredood said, the heads are pretty good already. There are various cams available out there. You may even consider Zephyr 550 parts, like cams or carbs.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.

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16 May 2007 07:22 #140577 by vintage1
Replied by vintage1 on topic Mods for the biggest HP gains=GPz550
I was thinking of using a set of KZ550 cams. I'm thinking this will make the bike stronger at the bottom end without changing gearing? I'm not looking for top speed or top end as I like strong 0-60 blasts!. I like the way the my standard 550-A pulled at the bottom and midrange. With the higher compression on the GPz should make it scream! Will these cams do the job??

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16 May 2007 07:55 #140583 by pyxen
Replied by pyxen on topic Mods for the biggest HP gains=GPz550
Then you're not looking for more HP.. you're looking to increase torque and low-end power.

HP is really only used to get more top-end speed.. isn't it?
84 KZ550-F2 LTD
93 ZR550-B4

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16 May 2007 11:20 #140653 by loudhvx
Replied by loudhvx on topic Mods for the biggest HP gains=GPz550
My friend has a gpz550 with KZ550 A cams. Yeah, it's nice and smooth, pulls vey well off the line, but wheezes out at higher RPMs. It's great in the city, especially with a passenger, but not as fun on the highway.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.

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16 May 2007 12:23 #140669 by Lorcan
Replied by Lorcan on topic Mods for the biggest HP gains=GPz550
The Wiseco kit works great on that bike.
760cc - 8.69@162mph
810cc, 211mph www.750turbo.com
www.stormdragbike.com

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30 May 2007 10:59 #144893 by vintage1
Replied by vintage1 on topic Mods for the biggest HP gains=GPz550
Right! more torque and all around power before 8K RPM for back country roads. Top end is not as much fun as smoking through 4 gears from a dead stop. My old KZ550-A4 model was a blast in the lower gears!

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30 May 2007 11:12 #144900 by GPz750KS
Replied by GPz750KS on topic Mods for the biggest HP gains=GPz550
You need NOS.. Two Bottles. The Big ones. And you need it by tonight.... :P

or....

Tow Rope and a ZX14....

Sorry, I'm bored at work... I don't have really any good answers for you. Looks like the rest have pretty much answered the question. However, there is no sustitute for displacement.... Engine kits and compression increases would make the biggest gains.

Richard Z.

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  • Faughn
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  • Don't drink the Kool-aid!
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30 May 2007 11:33 #144907 by Faughn
Replied by Faughn on topic Mods for the biggest HP gains=GPz550
GPz750KS wrote:


Tow Rope and a ZX14....

Richard Z.


:woohoo: :woohoo: LMAO
Custom Google Search for KZ related Stuff

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30 May 2007 15:31 #144979 by themachine
Replied by themachine on topic Mods for the biggest HP gains=GPz550
turbo!

turbo!

turbo!
82 kawaski csr1000 Evolved into a streetfighter.

I love Speed! Hot Nasty Badass Speed!!!

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30 May 2007 16:03 #144984 by N0NB
Replied by N0NB on topic Mods for the biggest HP gains=GPz550
Swap out for a GPz1100? :whistle:

I can't think of anything else but a wisecrack, sorry.

Odds are that while keeping the current displacement, you won't achieve much more than a ten percent gain before you have to get fairly radical with the mods.
Nate

Nates vintage bike axiom: Riding is the reward for time spent wrenching.
Murphys corollary: Wrenching is the result of time spent riding.

1979 KZ650 (Complete!)
1979 KZ650 SR (Sold!)
1979 KL250 (For sale)
1994 Bayou 400 (four wheel peel :D )

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