Jump to content
Sign in to follow this  

Gordon Mods w/ stock California needle

Recommended Posts

Anyone do the Gordon mods to a California XR4? I ride at 3,000 feet and live at sea level and am trying to figure out how far I can mod the bike without changing to the A16 needle. Would rather not deal with pulling the carb.

Based on Kev_XR's posts I was considering pulling the snorkel, unstalling the Uni and drilling the spark arrestor - then going to a 155/55 combo. If I leave the stock California needle in place will I cook the motor? :)

Any help from California riders would be appreciated.

Share this post


Link to post
Share on other sites

I think you mean installing a Uni. The stock Cali needle will be fine for now. The A16 needle is a double tappered needle where the stock Cali isn't. It is nothing that will hurt your engine.

Share this post


Link to post
Share on other sites

You're right. I meant INstalling the Uni filter.

What I'm concerned about is a possible lean condition that would cause overheating when using the California needle with the airbox/muffler mods.

Anybody have any experience in this area? Maybe changing the pilot and main is enough... but it would be nice to hear from someone who has done it and knows for sure.

Share this post


Link to post
Share on other sites

Just changing the jets is enough. I have never heard of anyone having a lean condition due to not changing out the needle. I ran my stock carb with a 55/158 combo for about a year before I changed the needle to the A16 (2000~5000 feet). It never ran hot, before or after. As a matter of fact, I didn't notice any difference from the original Cali needle. If you're really worried about this, I would recommend you using 58/158 jets.

Share this post


Link to post
Share on other sites

I did just what you are talking about. 155/55 without needle change. 1100 to 4000 feet. No problem. I have 1500 miles on the 2004 XR 400.

Share this post


Link to post
Share on other sites

Thanks guys! Keeping the stock needle will make the job way easier. I'm curious, did you guys drill the muffler or go with the '97 unit and a Vortip? Would that choice affect jetting at all?

By the way, were you happy with the end result? i.e. did you lose any low end power or have any negative side effects?

Share this post


Link to post
Share on other sites

I had a FMF PC4 put on my bike.

The jetting described by Gordon has to have either the drilled muffler end cap or the vortip. If you keep the stock muffler without modifying it, I think 55/155 may be rich.

When you are done, you will feel a gain all thourgh the power band. Your bike will literally breath a sigh of releaf.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this  

  • Similar Content

    • By 661Bran28den661
      What’s up guys. Totally new here picked up an XR400R I live in the desert so I’m riding often and enjoy it. But I am having some issues with my  01 XR400R. I brought it out this morning for a putt and it seems to be choking up in the top of second. Like a bog an go bog an go. First seemed fine and third I didn’t make it high enough into the rpms to see. Before I brought it back to the garage. Yesterday I also changed the air filter back to an uni. I had seen the other one had a hole in it and the box was dirty gunned up and oily. I removed the airbox gave it a good clean out wiped everything down very well put a piece of screen over the snorkel Or where it used to be I should say. “Lightly oiled the filter.Also the spark arrester an tip for the bike it did not come with I ended up making one with a piece of flat steel and drilling holes. Whilst doing this. I found also a crack in the pipe. It almost sounds as like there’s a vacuuming or whistle? When revving.The first one I had made worked fine I had no issues. This one I am wondering maybe if it’s a cause of a little too much back pressure.So I’m assuming it’s either a Carb or exhaust problem. Or something that could totally be minuscule. Or major issue. Would definitely like some second opinions and any advice would be greatly appreciated. Thanks guys! 
      TWISTIN THROTTLES & CRACKN BOTTLES


    • By ddickinson
      My lanky 14 year old boy started showing an interest in riding MX/Off-Road so I sourced the best beginner friendly, yet dirt worthy, bike I could find: an Ol' Honda XR250R (2004). So far I've replaced a few clutch levers and perches with stock parts. That's gotten old and I'm looking to upgrade to an ASV or Torc1 type fold-able clutch/perch brake combo. Went to purchase online today and to my surprise there were no such parts listed for the XRs. I saw plenty of CRF/CRF-X choices and they seem to differ depending on generation. Obviously I can use nearly any perch/clutch combo as long as the two match; but I was wondering if anyone knew which of these levers was closest to stock? Also, will the first gen CRF250X brake lever work on the XR? These may be stupid questions to some; but I'd rather ask a dumb question than drop money on an ASV brake lever I can't use. Thanks for any help.
      #xr250r#hondaxr  
       
       

    • By TheLastByte
      Im currently in the market for an xr400r, and considering buying one that's had some heavy engine work done. The current owner claims to have bought it from a friend who's an XR enthusiast. The PO installed a big bore kit and high comp piston, as well as a xrs only pumper carb, rsw triple clamp, aftermarket clutch, street lights, and a whole bunch of bling.
       
      My main concern is the effect the upgrades will have on the engine's longevity. How much quicker will I be going through top ends with the setup on this bike as opposed to a stock setup, and should I be worrying at all about bottom end longevity as well? I wouldn't mind having to eventually redo the top end, but I don't want to deal with a race bike type top end rebuild schedule on an XR. 
      Is there anyone here who's running a bike similar to this one who can give some advice? 
    • By Ralph303
      I have a 2001 Honda XR400R. It has a whirring/grinding sound in the lower end and a vibration in the top end. I pulled the valve cover and everything looks good. Decompression lever looks to be in order. Anyone know where I should start looking or just rebuild the whole engine. Ballin on a budget, but really love this bike. It looks like it’s new otherwise. Oil was jet black and thin. Thanks in advance! 
    • By junglePIG
      Hi, I have an Xr250r with a buckled/ wobbling front wheel, after trying to true the rim i have broken a spoke.
      I am wondering if it is possible to lace any 36 hole aftermarket rim to the oem hub, also will i need to buy an xr250r specific spoke set. also could i take a 36 hole rim from another front wheel and lace that up???? thanks
×