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Found 4 results

  1. Charles L'Abri Anderson

    xr650r fcr41 bog

    Hey all, I have got some carb trouble. I have been riding around my 2001 xr650r on roadtrips for about a year. Mostly up in northern california in the winter where its cold. With my FCR41 ive always had the issue where if i leave the petcock on, it wont start due to flooding. The bike runs great, just I have to turn off the petcock when doing ANYTHING.. like stopping to piss .. ANYTHING. I was on a recent trip through Arizona and Nevada a few weeks back and noticed that it was running super super hot. It was 115F outside, but the bike hit 250F on the vegas strip. Ive got a TT Vapor on there, so I am monitoring the water off the block. I have engine ice in it and a 1:8 cap. I figured with these two issues, its time to mess around with the carb. I pulled it apart and found that ive got a 160 main jet, 55 pilot jet and an OCEMP jet needle. The Needle clip was on 3/7 (from the top of the needle). So I set the needle clip to 5/7 and adjusted the float a tad leaner (its supposed to be 9mm). I also set the fuel screw to 2 turns out. Put it back together and MAN, the mid range really picked up. It also seemed to run a little cooler (around the 175F range). Problem is that when i roll off the throttle it bogs down to about 900RPM and then dies. If i keep on the gas, it does just fine. additionally, when on hills, it dies when i get to a stop on a hill (san francisco). Thinking that this is the float. Can anyone steer me in the right direction about the bogging and dying on hills when the throttle is off? It did not do this before the adjustment of the needle, float and fuel screw. I read that 55 is pretty rich for a pilot jet on this carb/bike. Seems most people run 45-48 pilot jet. My main is also pretty lean looking at 160 when most seem to be up in the 175-185 range. Thoughts?
  2. reip

    DRZ 470 with FCR 41

    Hi all, I recently acquired this DRZ from a buddy who had recently installed a 470 bore and stroke kit. Besides the 3x3 air filter and full delkevic exhaust (holy loud) the carb and cams are stock besides jetting (unknown sizes). Me being me, I got into researching the FCR carbs after hearing about them and got my hands in a brand new FCR MX 41 from the netherlands. It's got TPS and hot start. I ordered the 3d printed carb adapter for the non removable bell and an OEM drz400e intake boot. I asked the seller about how it's jetted right now and this was his response: Pilot- 55 Main- 180 Starter- 85 Main air- 200 Pilot air- 100 Then this...leak/needle 0,0 / OBDVR @ 5/7 Not sure what that all means. Could use some direction on where to go with the jetting. Would like to order any other necessary parts before the carb shows up next week. Thanks in advance.
  3. Hi there, Completely new here to the forum but already read a lot of info! Just bought a very nice Keihin FCR 41 MX carb to go with my KTM 640 SM 2004. This sunday i'm going to fit the carb on the bike but need some guidance for the jetting. The bike now has: - Snorkel from the airbag removed and the top of the airbbox is fully open - Leovince X3 slip on (i sawed de DBkiller, without it's way too loud and with the full DBkiller i can't hear the revs...) So... how to start with the jetting? I live at sea level! I also have a Rally cam laying around, do i need to rejet when i put the Rally cam in? Thanks in advance!
  4. Auguste88

    DRZ 400 Rally

    Hi everyone, I am curently building my bike for light adventure riding. I am making a contraption that I would like to call a rally fairing. I am showing you what I have made so far. For the build; - oversize GPI racing radiators - oversize gaz tank - fuel pump - swapping the speedometer by a vapor - custom made bracket for fairing - fiberglass fairing/windsheild I have not adressed the wide ratio issue since I just completely rebuild the engine last winter. I got a 39 teeth sproket for highway speed. I have no experience whatsoever with fiberglass, any input would be apreciated. Thanks for the interest.
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