Edelbrock float question(maybe)

9 replies to this topic
  • xr650l bum

Posted September 15, 2007 - 06:35 PM


I have a 93 xr650l. Uncorked, full yoshi exhaust, uni filter with no engine mods. I have put a used edelbrock carb on and the bike has run rich since I have got it. Original owner was running the 17 needle. I have dropped to the 16 tested, still rich. Now I have dropped to the 15 and the bike runs great at idle, pulls great, but if I maintain a speed about 50-70 plus for length of time the engine will start to bog like it is running rich. I did take the carb apart and cleaned it a couple weeks ago. At this point I am assuming that I need to adjust the float level. Am I on the right track? If so how much do I adjust the float and wich way? I did do a search but could not find my answer. Thanks

  • xr650l bum

Posted September 16, 2007 - 05:39 PM


Amazing. I starved the carb by two clicks today, ran it down the freeway, and bog sputtered ran like Sh#t. I was out of gas so I stopped and filled up. Then it dawned on me that after reading a thread on this website about there being no difference in running premium to reg unleaded gas, I had put 89 octane in last fill. Filled it with premium 91 went back down the highway and wa la. Ran like a dream. Held 80-85 for extended periods with no hesitation what so ever. Running 14-48 with the dirt wheels so it gets a little buzzy high speed so I did not get crazy. Now I need to richen by a click because idle is wandering from being to lean at idle. High octane seems to be required.

And my gas milage sucked!!

  • martinfan30

Posted September 17, 2007 - 07:07 AM


thats all i ever run. you can tell a difference as you found out.

  • Denn10

Posted September 17, 2007 - 10:21 AM


i wonder if you had some bad gas cuz ive used both with no difference noticeable, it is only a 8.3-1 comp which is pretty low compression engine. Glad your good to go now though.

  • martinfan30

Posted September 17, 2007 - 10:25 AM


i swear mine seems a little rougher running on 87.

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  • nilson

Posted September 17, 2007 - 10:28 AM


Compression isn't the only thing that leads to premature detonation (pinging): high engine temps could cause problems too and higher octane will help with that.

  • jetfuel

Posted September 17, 2007 - 12:33 PM


i swear mine seems a little rougher running on 87.

I too seem to notice a slight difference. so I just run the higher stuff also.

  • xr650l bum

Posted September 29, 2007 - 04:23 PM


Noticed that on this new tank of gas the bogging at high speed started happening again. Seems to be happening when the tank is getting 3/4 empty. I went in to the carb and adjusted the float level. Raised the float level just a little. Did not add any gas, did not do anything but adjust the float level. Ran it down the freeway basicly on reserve. Worked. No issues. I think that solved the issue!

  • bork

Posted September 29, 2007 - 06:00 PM


You adjusted which way? higher more full in bowl OR lower level(less fuel)?

  • xr650l bum

Posted September 29, 2007 - 06:03 PM


I adjusted higher, so there was more fuel in bowl. Bike was starving for fuel after keeping throttle open for extended periods of time.

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