Thread: Free flow exhaust
04-30-2008, 10:08 PM #1
Free flow exhaust
Has anybody done an exhaust conversion? I was thinking of putting in a free flow exhaust on my 2001 GPR800. Would you recommend this? Does anybody have pics of a ski with a free flow exhaust system? Will it help?
04-30-2008, 11:16 PM #2
on a 1200 it slows you down and makes the ski noisier
04-30-2008, 11:21 PM #3
I was also thinking about putting one on my gp1300r. Would it slow it down on this model as well?
05-01-2008, 12:30 AM #4
The free flow exhaust should on be used in conjunction with an aftermarket head and milled stock head. The purpose of a free flow exhaust is to reduce detonation. On a stock ski you will lose speed. On a modded ski I am sure you will lose some speed. Depends on your combo though.
05-01-2008, 07:38 AM #5
Chris is right, while not a must with bumped compression it is nice insurance.
I had the metal FF and jetworks on my non ported GP1200R and it was a 75 mph boat so my speed loss couldn't have been all that much......maybe .5 mph?
If you are into muscle cars, loud cars, or just get a chubby from the raw sound of motors then you will like the sound. It sounds awesome and will really set your ski apart.
05-01-2008, 09:54 PM #6
05-02-2008, 12:42 PM #7
this is the modifiation that takes out the "muffler" correct? how come speed is lost?
05-02-2008, 01:02 PM #8
Understand going into it that removing the SS makes the ski very loud. I wear earplugs when I do long rides to prevent my ears from ringing for days afterwards. No kidding.
05-02-2008, 01:19 PM #9
David, you have the old school metal ff right? The blue riva tube is a little quieter.
05-02-2008, 01:36 PM #10
I am running the riva blue tube. It is perfect. Not too loud. It has more of a rumble.
Reason for speed lose is because of a slight rpm lose. This is caused because the 2-stroke motor runs best with more back pressure.
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By RX951 in forum Yamaha How To & FAQsReplies: 34Last Post: 10-15-2009, 01:37 PM
By NeverEndn in forum 4-Tec PerformanceReplies: 2Last Post: 08-03-2006, 10:55 PM
By O-ToWn1300R in forum Yamaha PWC Performance (2-stroke)Replies: 2Last Post: 05-10-2006, 02:45 PM
By Yellow93 in forum Yamaha PWC Performance (2-stroke)Replies: 9Last Post: 04-28-2006, 11:19 PM
By RXP19 in forum 4-Tec PerformanceReplies: 4Last Post: 05-14-2005, 10:07 AM