carburetors

  1. J

    Fuel in my exhaust

    I have a 1980 xs 650 that I hard tailed, installed a pma and Pamco. I have rebuilt bs34s with stock jetting. The jetting that was one step up fouled my plugs within minutes and caused soot and fuel out of the exhaust. I adjusted the cam chain, valves and timing. The floats are brass and at 27.3...
  2. S

    Choke & Idle

    Just purchased a 79 XS650 as a project and 2 weeks into it finally got it running (glad I found this site!!). Anyway, I'm not really understanding the choke on the BS38s Hopefully my picture attaches, but it shows when I manually push the choke lever up, my idle slows way down like the choke...
  3. M

    New bike, help me figure out how to start it....

    This is a little embarrassing but I bought a 82 xs650 a few days ago and trailered it home. I couldn't actually take it on a test ride because my hand is messed up from an accident last week but had the owner start it cold and ride it up and down the street so I could listen. (he started it...
  4. xschris

    Pastic washer for 80-84 bs34 carbs

    Where are these sold and has anyone bought them on-line.
  5. C

    float needle

    ordered a carb rebuild kit should be in today, not sure about the float needle,read the carb guide a few times, and checked here, i think the new one says it pushes in, is there no adjustment to it? havent pulled old ones yet, but as far as i can tell i just unscrew them, maybe spray some...
  6. L

    1978 XS650 Engine knocking noise

    Hi Everyone, I have a 1978 XS650 that I just brought back to live after being stored away for 31 years. It was stored away after the owner ran the bike low in oil, and then heard a knocking noise the next day. What a surprise, I have a strange tick/knocking noise. I'm afraid it could be a rod...
  7. M

    New to me 81. High idle. Popping exhaust. Red hot pipes.

    Hey guys. This is my first post. Wish it was under better circumstances but I'm chasin a problem I can't figure out. I picked up my 81 last summer and rode it a bit but it never ran right and I had to kick the living hell out of it to get it to start. Electric start is intermittent??? Least...
  8. G

    Carb intake manifolds. Recommendations?

    Hey Ya'll I'm looking to get some new intake boots (manifolds) for my '79 with stock 38 carbs. The stock originals that came on the bike worked fine for most of the summer but into the fall they began to get more cracked and the bike started pulling vacuum in the right side causing some...
  9. system9

    Carb sync Negative Reading?

    Some info first. Saturday I received a set of VM34 carbs. After some basic tweaking bike was idling ok. It seemed like it idled best with the mix screw all the way in, so I'm guessing I need a little bigger pilot jet. But, it still started, and idled pretty well. I took it out for a test drive...
  10. Uglies

    Two Carbs No Connecting Parts Can I Run Seperatly?

    I had a box of carbs but none of the brackets that hold two of them together so they would both be mounted together and work as a team. My question is can i mount them seperately by syncing them as close as possible and running a throttle cable that has dual cable, where one cable goes to...
  11. ROYSTON

    Help needed 1978 xs650 se

    First time out after rebuild. Starts up & runs fine, carbs have been rebuilt & synced, fuel levels set. Bike has no power & dies as if starving of fuel. This bike has been converted to electric ignition (don't know if that is a factor) Any ideas ? Thanks.
  12. V

    Dellorto Pumper Carbs

    Hi, kind of thought this link could come in handy for anyone looking into the Dellorto carbs. Ive got myself a pair teamed up with my 750 bigbore and searched around to get some more details about the carbs that I have. Found this page wich is nice with alot of information related to the...
  13. DIRTY DOG

    looking for 1965 yamaha catalina parts

    ok guys looking for 2 1965 yamaha catalina carb rubber boots not the intakes but the ones that go over the tops around the cables any one out there have a few or know where to get some
  14. rangerider45

    Intake Torque Specs

    Usually I just tighten down the carb intake bolts, but am curious now if I should torque them down. Is there a torque specification for them. Can't find torques specs in my Clymer or XS650.com. Just not my day ;-) Anyway, anyone one have a suggestion? Just tighten them like I have been or torque...
  15. J

    cant get bike to run, gas ending up in the oil.

    Ill start from the beginning. I bought this bike as a stock 1980 xs 650 special and i was 19 years old. i originally went with the brat set up from visual impact because i planned on this being my daily rider and my old man thought a hard tail would be to much as a daily rider. I installed a pma...
  16. D

    engine rev,s with throttle closed

    Hi guy,s. just finishedthe latest build of mine.Ihad a 2 into 1 inlet manifold made,and fitted a mikuni vm 36 carb.It run,s great on tick over,but when you rev it and let the throttle off the rev,s stay high and only drop down again after a couple of minutes.I have tried moving the needle up...
  17. D

    Pwk mod to change both jets without removing bowl

    Okay ,so Im pretty familiar with legit pwk carbs form dirt bikes and when I went to jet an xs650 that I bought with the Mike's pwk already installed I was very annoyed with the fact that I had to remove the bowl just to change 1 little jet un like on most my dirt bikes I could remove the drain...
  18. warrenlevihursh

    Max Pilot size on BS38 Carbs?

    1978 XS650, Really short dual exhaust, Mike's POD filters, BS 38 carbs, stock ignition/points/advance. Hey guys!, I got my chopper project running, charging and riding, so I took it to a buddy's shop for them to check the timing with a light (bc I don't have one) and jet the carbs. They...
  19. T

    New to bikes, carbon build-up & tuning issues.

    Hi everyone, My name is Tani and I'm rather new to bike land. I have myself a '78 XS650 that was cafe'd out 2 owners ago and after MUCH time and messing around I have gotten to a point where she is running pretty strong but I'm having richness and carbon build up problems. While with me 3...
  20. J

    wont start with new carbs

    half way through my build i started my bike up with a custom wiring harness, straight pipes, uni filters and a pma/pamco swap. I have since changed over to the vm 34's with 175 main jets and 15 on the pilots. i have 2 sizes up and 2 sizes down on the mains and a size up and down on the pilots. I...
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