74 g3ss 90cc - Kawasaki Motorcycle Forums
LinkBack Thread Tools
post #1 of 2 (permalink) Old 09-06-2019, 08:00 PM Thread Starter
Junior Member
Join Date: Sep 2019
Posts: 1
74 g3ss 90cc

Hey guys new here hoping for some help im looking for someone who makes a custom pipe for this bike also other easy ways to get power if anyone can help it would be much appreciated thank you!
Barbin06 is offline  
Sponsored Links
post #2 of 2 (permalink) Old 09-08-2019, 08:08 PM
Join Date: Jan 2019
Posts: 34
Several things to consider here.
Manufactures produce parts for popular high volume models, they are after all in business to make a profit. The call for expansion chambers for 90cc Kawasaki's was likely never very great. Nothing is impossible but the chances of finding a pipe for an old 90 is very unlikely. However all is not lost, there are resources that contain the formulas to construct a 2 stroke expansion chamber. Along with the chamber you will want to consider porting, compression, rotary valve and carburetor changes. In the end, unless racing in a specific class you are probably wasting your time. Given a fixed displacement there are only two ways to increase the output of an internal combustion engine, you can increase BMEP or you can increase RPM. At any given time in the history of internal combustion engines there is a practical limit to BEMP, that leaves RPM. You can certainly increase the number of combustion events per minute but that will negatively affect low rpm performance. Also every hp added will shorten the life of the engine. At modest increases this will be negligible, but at significant levels engine rebuilds will be much more frequent. Truly there is no free lunch. A high performance small bore engine, and there have been plenty produced over the years, will be peaky and require constant tuning. The higher the output the narrower the tolerance for jetting and such.
1981GPZ550 is offline  

Quick Reply

Register Now

In order to be able to post messages on the Kawasaki Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome