RB head, KIPS, Resonator Spacer, Torque ring and such...

Questions and Answers about the best carb and Head mods available for the KDX.
Post Reply
RyanKeyte
Member
Posts: 16
Joined: 12:11 am Mar 21 2014
Country:

RB head, KIPS, Resonator Spacer, Torque ring and such...

Post by RyanKeyte »

Ok, I have been playing with my 96 200 lately trying to sweeten the power to how I want it, and here are the results. Initailly I rebuilt the bike about 70 hours ago (things are still very tight), then a few weeks ago I decided to have the RB head done. I disassembled things and sent it off. When I put it back on, I felt a little difference- not much, but some. I added a KIPS resonator spacer, about .250 thick.. WOW- way better. Made a few torqure rings at work, so I threw one in too; It did something, not sure what though- better? worse? It needs more testing. I was not liking the PUNCH of the Rev Gnarly and the KIPS opening, I want a smoother linear power. Then I adjusted how the KIPS comes on by playing with the bolt-washers-spring and ball piece on the Kips (on the left side in front of the KIPS cover). I ended up ADDING a copper washer that was about half as thick as the stock two. (valves open sooner) Things feel sooooo much better. Better power everywhere, you really cannot feel when the powervalves open, you can only hear the change in pitch on the pipe. The power is very linear. Feels more like a hopped up 250f, just way lighter and flickable. Love it! will hit some tight single track this weekend, and see how I like it in more "real world" applications..

Basic build sheet for reference.
96 KDX 200
2000 KX500 front
RB head mod
Carb venturi divider
140 main, 40 pilot, DEL needle
Boysen 607 reeds
Gnarly Rev pipe
Powercore silencer
13-48 gearing
KIPS resonator spacer
Torque ring
3 washers on Kips bolt
My helmet is making it hard for me to hear natural selection screaming my name!!
User avatar
TheJackRabbit
Supporting Member
Posts: 147
Joined: 11:05 pm Sep 29 2012
Country:
Location: Western PA

Re: RB head, KIPS, Resonator Spacer, Torque ring and such...

Post by TheJackRabbit »

where did you get the KIPS resonator spacer from?
http://www.youtube.com/allthatstuff35 <--- some KDX videos here
I'm smarter than I act
RyanKeyte
Member
Posts: 16
Joined: 12:11 am Mar 21 2014
Country:

RB head, KIPS, Resonator Spacer, Torque ring and such...

Post by RyanKeyte »

It actually was on the bike when I got it, but removed it when i rebuilt the top end. Its a pretty crude hunk or aluminium that looks as though it has been fashioned with a variedty of rocks, chisels, hammers, and files. (obviously was a DIY project). If I get a chance I could possibly make a few at work. Maybe write a little cnc job, or just make them manually. I'm a machinist for an areo-space shop, so I'm a little spoiled when it comes to making my own stuff :boogie:
My helmet is making it hard for me to hear natural selection screaming my name!!
User avatar
Joshmcmillan
Supporting Member
Posts: 232
Joined: 09:02 am Aug 23 2013
Country:
Location: Australia

Re: RB head, KIPS, Resonator Spacer, Torque ring and such...

Post by Joshmcmillan »

Sorry for the maybe silly question, but what are torque rings?

I've heard good and bad things about torque spacers on the resonator chamber, the bad is only that they haven't noticed an improvement, so I can't see a reason not to try it.
07' CR450X (Main Bike)
07' KX125 (Completed basket case rebuild, for sale)
88' KDX200 (Not sure yet, runs but with rattly top end)
91' CBR250RR
Old Bikes: 97' KDX200, 00' RM125, 85' XR350, 94' KDX200, 02' CR80, 82' XT250, 98' CT200
RyanKeyte
Member
Posts: 16
Joined: 12:11 am Mar 21 2014
Country:

RB head, KIPS, Resonator Spacer, Torque ring and such...

Post by RyanKeyte »

A Torque Ring is simply a very thick washer that goes between your pipe and the cylinder. It basically moves the volume of the pipe further away from the cylinder, and giving the engine more low-end torque. Its the same prinicipal as the Resonator Spacer; except the resonator spacer gets cut-off when the KIPS open, but the Torque Ring takes a few hundred RPM from the top speed. Its funny how these items work for some bikes, and on others they seem to do nothing. Google Jeff Freddette and FRP. His site has more info. Also i think there is a link from the home page to his site....
My helmet is making it hard for me to hear natural selection screaming my name!!
frenche200
Supporting Member I
Supporting Member I
Posts: 245
Joined: 12:56 pm Oct 04 2013
Country:
Location: france

RB head, KIPS, Resonator Spacer, Torque ring and such...

Post by frenche200 »

RyanKeyte wrote:I added a KIPS resonator spacer, about .250 thick..
please, 250 milimeters? it seems me enormous?
TheJackRabbit wrote:where did you get the KIPS resonator spacer from?
i'm going to make one, i have an other kips cover and I do not use it, I'll cut the top and I would have a spacer to the desired thickness for cheap ;)
i'm French and I don't speak English very well, so, please, excuse me :)
User avatar
diymirage
Supporting Member II
Supporting Member II
Posts: 2909
Joined: 05:00 pm Sep 19 2011
Country:
Location: michigan

RB head, KIPS, Resonator Spacer, Torque ring and such...

Post by diymirage »

frenche200 wrote:
RyanKeyte wrote:I added a KIPS resonator spacer, about .250 thick..
please, 250 milimeters? it seems me enormous?

in the US .250 generally means 250 thousands of an inch, 6.35 mm :wink:
newbbewb wrote:DIYmirage has it right.


-1996 KDX 200 woods weapon (converted to 99 green body)
-1996 KDX 200 plated street toy (barney edition)
-2003 Yamaha TTR125-L (wifeys bike)
-1997 KDX 220 project bike
frenche200
Supporting Member I
Supporting Member I
Posts: 245
Joined: 12:56 pm Oct 04 2013
Country:
Location: france

RB head, KIPS, Resonator Spacer, Torque ring and such...

Post by frenche200 »

diymirage wrote: in the US .250 generally means 250 thousands of an inch, 6.35 mm :wink:
once again you help me a lot, thank you! :grin:
i'm French and I don't speak English very well, so, please, excuse me :)
RyanKeyte
Member
Posts: 16
Joined: 12:11 am Mar 21 2014
Country:

RB head, KIPS, Resonator Spacer, Torque ring and such...

Post by RyanKeyte »

frenche200 wrote:
diymirage wrote: in the US .250 generally means 250 thousands of an inch, 6.35 mm :wink:
once again you help me a lot, thank you! :grin:

Yes, sorry- .250 of an inch, (about 6mm). I forget that we have so many on here that are more familiar with metric rather than our ridiculous imperial system....
My helmet is making it hard for me to hear natural selection screaming my name!!
frenche200
Supporting Member I
Supporting Member I
Posts: 245
Joined: 12:56 pm Oct 04 2013
Country:
Location: france

Re: RB head, KIPS, Resonator Spacer, Torque ring and such...

Post by frenche200 »

no problem :grin: :grin: ! I'll think about the next time I saw a dimension that seems strange to me .. I adapt!

I'm curious about your torque ring, can you tell me how thick it is? Thanks!
i'm French and I don't speak English very well, so, please, excuse me :)
kenpowell
Member
Posts: 26
Joined: 10:27 am Mar 05 2014
Country:
Location: Bryant, AR

Re: RB head, KIPS, Resonator Spacer, Torque ring and such...

Post by kenpowell »

frenche200 wrote:no problem :grin: :grin: ! I'll think about the next time I saw a dimension that seems strange to me .. I adapt!

I'm curious about your torque ring, can you tell me how thick it is? Thanks!
I do not have the FRP torque ring but was told that it is .21 inches / 5.3 mm thick. Here is the link to the FRP site:
http://www.frpoffroad.com/fredette-raci ... id=-154648
Ken Powell
2012 KTM 300 XC with YZ SSS cartridges in the WP tubes
2003 YZ265WR with 2005 AOSS forks
2003 KX125 / KDX200 motor with YZ SSS forks
First Motorcycle - 1963 Harley 175 Scat
User avatar
bufftester
Platinum Member
Platinum Member
Posts: 3455
Joined: 06:03 pm Oct 31 2012
Country: USA
Location: University Place, WA

Re: RB head, KIPS, Resonator Spacer, Torque ring and such...

Post by bufftester »

I am currently running a torque ring on my 220 hybrid motor. Not so much for the change in torque and I needed the extra couple mm's to have clearance between my pipe and frame. I honestly don't feel much difference, but then my motor is straight stock atm.
Post Reply