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jeremy_77

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About jeremy_77

  • Rank
    TT Newbie

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  • Gender
    Male
  • Location
    Tennessee
  • Interests
    Car, bikes, boats, crossfit

    2007 Honda XR650L
    Mikuni 42mm pumper
    FMF powerbomb/ powercore q4 exhaust
    K&N intake filter
    Airbox drilled/ snorkel removed
    Clarke 4.7
    Polisport supermoto front fender
    Maier MX rear fender
  1. jeremy_77

    650L Mikuni pumper jetting

    turn which screw? mine has 2, one for how early it comes on and the other for when it stops
  2. jeremy_77

    650L Mikuni pumper jetting

    Ok so I figured out I was turning screw wrong. So I installed the bigger jets, since the ones in it I had the screw out only half a turn. It still backfires when i let off the throttle. I adjusted the pumper to come on as late as possible because it was stumbling when it would come and seems best for it to come on late, yet it backfires and pops with biggest jets. Sometimes it fires in the carb too
  3. jeremy_77

    650L Mikuni pumper jetting

    went riding, at high rpm it acts up, and seems to hesitate off idle, or if I blip the throttle a couple times. Wondering if its too rich, It seemed to run worse with the bigger jets, I think I might try the smaller jets.
  4. jeremy_77

    650L Mikuni pumper jetting

    Maybe but it didn't do it before
  5. jeremy_77

    650L Mikuni pumper jetting

    It seems like when I back the idle air screw out, it backfires more, I installed bigger jets, It seemed to run worse/ backfire more. Can too rich cause more backfire/popping? It seems to backfire/pop in carb and intake occasionally too When I installed the exhaust and jet kit on the factory carb i was able to get rid of hesitation and backfiring, now Im back to that though
  6. jeremy_77

    650L Mikuni pumper jetting

    I have a 07 XR650L with FMF powerbomb/Q4, airbox drilled/snorkel removed, KN Filter. I just installed a Mikuni 42 pumper from XRs and trying to get the jetting right. It has a little hesitation when I blip the throttle. When coasting down it backfires/pops more then my old carb with fmf powerup jet kit. When I blip the throttle it puffs out a little black smoke. I have messed with air screw, turn in all the way, about half turn out it runs, and backing out 1.5 turns it runs rough again and dies. So I have it backed out 1 1/4 turns. It seems like a very small window where it will actually even stay running, the fact that it wont run at 1.5+ turns make me think I should not switch up to a bigger pilot jet, but 1.25 turns is not much. Please help Also It seems like at about 25-50% throttle it has a little hesitation too
  7. jeremy_77

    650L Mikuni 42mm pumper install

    from what I can tell, I need to go bigger on jets
  8. jeremy_77

    650L Mikuni 42mm pumper install

    Tuning: Ok I need help tuning. It has a little hesitation when I blip the throttle. When coasting down it backfires/pops more then my old carb with fmf powerup jet kit. When I blip the throttle it puffs out a little black smoke. I have messed with air screw, turn in all the way, about half turn out it runs, and backing out 1.5 turns it runs rough again and dies. So I have it backed out 1 1/4 turns. It seems like a very small window where it will actually even stay running, the fact that it wont run at 1.5+ turns make me think I should not switch up to a bigger pilot jet, but 1.25 turns is not much. Please help Also It seems like at about 25-50% throttle it has a little hesitation too
  9. jeremy_77

    Honda XR650L 2007

    My XR650L, with full makeover Mikuni 42mm pumper carb Smog removal w/ blockoff FMF Powerbomb w/ heat wrap FMF Q4 Snorkel removed Airbox drilled K&N Air filter JT 40T rear sprocket XR's only oil temp gauge XR's only magnetic oil drain plugs Saddlemen Seat Clarke 4.7 tank with Clarke petcock Supermoto mirrors 1" bar risers Nokya super white headlight bulb custom mounted dual fog lights LED turn signals Polisport Supermoto front fender Polisport CRF rear fender Polisport Enduro taillight Krylon painted headlight shroud/handguards Wolfman tool bag future plans: 667cc bigbore kit hotcams stage 1 CRF forks Trailtech computer Protaper bars
  10. jeremy_77

    Honda XR650L (2007)

    0 comments

    My XR650L, with full makeover Mikuni 42mm pumper carb Smog removal w/ blockoff FMF Powerbomb w/ heat wrap FMF Q4 Snorkel removed Airbox drilled K&N Air filter JT 40T rear sprocket XR's only oil temp gauge XR's only magnetic oil drain plugs Saddlemen Seat Clarke 4.7 tank with Clarke petcock Supermoto mirrors 1" bar risers Nokya super white headlight bulb custom mounted dual fog lights LED turn signals Polisport Supermoto front fender Polisport CRF rear fender Polisport Enduro taillight Krylon painted headlight shroud/handguards Wolfman tool bag future plans: 667cc bigbore kit hotcams stage 1 CRF forks Trailtech computer Protaper bars
  11. jeremy_77

    650L Mikuni 42mm pumper install

    Ok thanks! I thought so. What about the choke hook up, it's on the right of carb, is that a issue? Cable will reach? And jetting, xrs says it is right for my setup. I have fmf power bomb/ q4 exhaust, drilled air box with kn filter and snorkel removed. Running fmf power up kit jets and needle, main is 165 and pilot is 58. I believe the mikuni has 150 and 22.5. Do I need to step these up? It came with some extra jets, 152.5/155 and 25/27.5 I think?
  12. Looking for some help. Are the only hoses that I Hook to this carb on a 650l the fuel hose, and the drain hose on the bottom? I know I leave the vent above the fuel port open, what about the other 2 nipples/ports? Cap off?
  13. Nobody is running this carb?!?
  14. jeremy_77

    Show your PIG

    My XR650L, with full makeover Mikuni 42mm pumper carb Smog removal w/ blockoff FMF Powerbomb w/ heat wrap FMF Q4 Snorkel removed Airbox drilled K&N Air filter JT 40T rear sprocket XR's only oil temp gauge XR's only magnetic oil drain plugs Saddlemen Seat Clarke 4.7 tank with Clarke petcock Supermoto mirrors 1" bar risers Nokya super white headlight bulb custom mounted dual fog lights LED turn signals Polisport Supermoto front fender Polisport CRF rear fender Polisport Enduro taillight Krylon painted headlight shroud/handguards Wolfman tool bag future plans: 667cc bigbore kit hotcams stage 1 CRF forks Trailtech computer Protaper bars
  15. I have a xr650l and ordered a mikuni pumper carb from xrsonly. Not sure on install, what hooks where and how to install choke since its on opposite side
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