116 replies to this topic

[trooper8 TT Silver Member]

Here is my 98 XR400 done by the previous owner.

[YHGEORGE TT Addict]

trooper8 said:

Here is my 98 XR400 done by the previous owner.

What are we supposed to see here?

[trooper8 TT Silver Member]

Holes drilled in exh tip.

[jokerflingo TT Gold Member]

trooper8 said:

Here is my 98 XR400 done by the previous owner.

Youve got that many you might as well just pull the ****er out lol

[motomonkey666 TT Member]

Does anyone have the EXACT BHP for a fully stock XR400?

[Hardergamer TT Member]

motomonkey666 said:

Does anyone have the EXACT BHP for a fully stock XR400?

What year? and wear from UK, USA CAN? but most are about 29-31BHP:thumbsup:

[motomonkey666 TT Member]

Hardergamer said:

What year? and wear from UK, USA CAN? but most are about 29-31BHP:thumbsup:

2000 onwards, and the UK model.
Cheers:ride:

[jg83 No longer a Newbie]

I have a stupid question but here it goes.
Who is Gordon?

[Trailryder42 Get Help Now]

 jokerflingo, on 27 June 2011 - 06:51 PM, said:

Youve got that many you might as well just pull the ****er out lol

Yeah, done by someone who figured "if 3 is good, 20 has to be better".

[Trailryder42 Get Help Now]

 jamesgardner83, on 09 March 2012 - 01:28 PM, said:

I have a stupid question but here it goes.
Who is Gordon?

Right around the '99 year model, Gordon Banks is a guy that did some experimenting on his XR400s intake and exhaust, trying different mods and configurations, calculating volumetric efficiency and air flow of each and documenting the results. The Gordon Mods we have today are the culmination of that effort. The best configuration he came up with for the stock components.

[XL100allnightlong TT Bronze Member]

I have a question, I finally pulled the snorkel out of my 02 xr400. I have the uni filter and  58/155 jetting right now and the bike seems to be pulling better with the snorkel out. Wouldn't it make sense to richen the needle one notch? I still have to drill the holes in my exhaust tip. It seems to me that it would only make sense to richen the needle a notch? Do I have to pull the carb to get to the needle or can I just loosen the clamps and turn it? Thanks!

[large144 TT Member]

This is a bit late mate, but go and do all your free mods first, then look at the jetting, it will save time in the long run.

[scm250r TT Newbie]

I started doing the Gordon mods on my '97 XR400 and I noticed that the exhaust tip I have is for the newer bikes....(no removable insert)
Why could this be?

[large144 TT Member]

Had a stack - replaced exhaust.

[vascoribeiro TT Member]

Hi!
Where can i get the gordon mods?  I cant understand the links, one is dead the other sends me to yahoo...

Tks

[michigan400 TT Platinum Member]

 vascoribeiro, on 20 March 2013 - 10:52 AM, said:

Hi!
Where can i get the gordon mods?  I cant understand the links, one is dead the other sends me to yahoo...

Tks

Its all below the links on the 1st post of this thread.

[vascoribeiro TT Member]

Tks I didnt know that was all!!