Kawasaki Motorcycle Forums banner

Status
Not open for further replies.
1 - 9 of 9 Posts

·
Registered
Joined
·
6 Posts
Discussion Starter #1
I am new to modifying sportbikes and was wondering if you all could offer some help. I have a 98 ZX6R with a full muzzy system, lowering links and jet kit. I want to keep the bike street legal but I want to smoke some gsxrs (im sick of seeing them instead of kawasakis). I know that nothing is impossible but that doesnt make it easy. Do any of you know where I could find some sort of a big bore kit for the motor, extended swingarm and anything else that would help acceleration? I am considering using nitrous oxide. I understand that it is different on a sportbike in a big way but I do have experience with it on cars and am fully aware that building the bottom end is neccesary. I have been to muzzy's site but pretty much all I see is stuff for the 12R. Any info would be useful. Thank You.


0- death in 2.2 seconds.
 

·
Registered
Joined
·
446 Posts
I would recommend sending the motor to a reputable builder in your area and go with the following.

2mm overbore cylinder (millenium technologies is good to do this)
contact JE pistons to have custom pistons done

This mod alone will help ya to give the gsxr750's some headaches
 

·
Registered
Joined
·
6 Posts
Discussion Starter #4
Hey cool thank you for the replies. I also received some emails as well. I will try to find a reputable builder for the internal work until I learn more about the motor.

0- death in 2.2 seconds.
 

·
Registered
Joined
·
1,230 Posts
You could bore it out to be a 628 or 636. but it will cost $$$$$ I wouldn't use NOS on a 600cc bike though. its ment for 1000cc+
same goes for turbo chargers ans super chargers. The cheapest thing to do would be to change your spockets, then get a full exhaust.
then some things to consider:
lighten up you bike anyway you can (even take the tool kit out)
look up what compression ratio you have to see what fuel would be best for you, change your chain setup if you change you sprockets. go with a 20 you have a 30 i bet. Also I would go with an X chain, if your going to a thinner lighter chain. Get an ignition advance, full exhaust system, I could go on and on and on and on.
 

·
Registered
Joined
·
32 Posts
The '98 ZX6R has flat topped pistons, vs the 2000 on Zx6r which came to a point. I find this interesting, I wonder if the company purposely did this to limit the bike, I would almost bet they did, here's why:

I also own a 1990 zx-6 "D", which has almost the exact same pistons as an "E" model, but the skirts are different. Once I managed to get some 1995 ZX6R pistons, they were just like the "E" model pistons (Interchangeable actually, if you bore the cylinders of the old ZX6) but the top was not flat, they were much like the 2000 and newer pistons. This yeilded higher compression. After building that engine the old ZX went up 9 Horsepower to the rear wheel. Talk about a good mod.

I plan on swapping some 2000 pistons into my '98 ZX6R, and seeing if the performance gain is there... I'm pretty confident it is, since the 2000 bikes had higher compression and thus more power. Something to be thankful for: Kawasaki Ninja ZX6R's have cast sleeves in '98, so you can bore away!!! No cylinder plating here!

Good luck, if anyone else has tried this mod, let me know!
 

·
Registered
Joined
·
6 Posts
Discussion Starter #8
Thank you for your input everyone. I have to ask why nitrous isnt a good idea on a 600 that is built? I figure if I keep a reasonable compression ratio and instead of advancing igntion retard it, things should be fine right?
 
1 - 9 of 9 Posts
Status
Not open for further replies.
Top