carburetors

  1. K

    Going to the dark side

    I AM GOING TO BUILD A SINGLE SIDE MOUNT CARB SET UP . ANY IDEAS OF THE SIZE OF MIKUNI CARB TO USE ??????:yikes:
  2. W

    1978 xs650 ran perfect, now it won't even fire. Need diagnostic help

    Hey guys. First post to the forum. I've managed to get pretty Far on my own, but I really need some help. My bike is a 78 xs that that I built completely from scratch. I've attached a picture, but don't know how to make it visible otherwise. It was sold to me in non running condition and...
  3. C

    Runs on Quick Start then Stops!

    Hello, I've got a 1979 special, dual points, running off the battery (PMA isn't hooked up yet). The battery is showing about 12.5 volts. I got the bike 2 years ago and pulled the engine to clean it up, etc. I put everything (except the harness, which was a mess) back in place and it sat...
  4. A

    Missing on steady throttle

    G'Day all, I've been reading a lot of the great material on this forum for a while now, but this is my first post. I hope I'll be forgiven for this first one being a quesiton, but I just need some help to get started. I've got an XS650C that I've hardly had to touch since buying it some time...
  5. T

    34vm round slides again sorry

    I know i know not again but I've spent hours now reading and following links the more i read the less i seem to understand . I don't want to race or do anything silly I've got a stock standard 1980 . does any one know what the set up would be for vm34 round slides like the correct main jet size...
  6. system9

    Needle supposed to have this many washers?

    My midrange has been hard to tune in, so I bought some Canadian needles, and needle jets. Upon removing the "stock" needle, I was a little surprised that there were 3 washers involved. 1 above the clip, and 2 below. Is this normal?
  7. X

    Tuning

    Hey guys/gals, Doing a little investigation today on my newly running engine. I am experiencing a little popping only on the right side. I put the timing light on my new PMA and have that sorted and I adjusted the idle. So a little background before the question. Overhauled top end, new...
  8. F

    How to tune the carburetor when you have Pamco High Output Electronic Ignition Kit w

    Hello, I Have a standard 1979 xs650 With the pamco High Output Electronic Ignition Kit with Electronic Advancer. I am trying to understand how to adjust the carbs (vm34mm mikuni) with out using the dead cylinder technique. If I pull one of the plug wires while the bike is running you lose the...
  9. 71xs1

    Is this carb related??

    I have a 81 with short open pipes and pods. As far as I know carbs are stock. They were cleaned well( soaked and all passages air blown) My issue is the bike backfires at idle and deceleration. It also seems to run out of steam at top end. Was thinking this is because of needing more fuel. Any...
  10. ninskrillz

    Left cylinder runs weaker than right

    Hey guys and gals, I come to you with a problem I've been trying to solve for a couple weeks now. The left cylinder on my 71 is not firing as strong as the right. I believe it is causing inconsistent idle and pop stalling at idle or closed throttle. I've tried a plethora of things to get it...
  11. Vizzinzin

    Compression Test Help

    Hi I'm a new member to the forum and have been lurking for quite a while but finally need to make my first post... I recently purchased a 1978 xs650E (2F0-000101 type Vin) so an early model with the original engine in it and I'm having a bit of a problem with a compression test. So the...
  12. D

    For those running PKW carbs questions

    How did you guys set up your fuel system on these carbs the 32mm ones. I think the carburetor fuel line is 3/16. but the petcock is 1/4 or 3/8 inlet how did you guys set it up.
  13. bpupeza

    Celebrate my win! Shout out to UNI filters.

    I have a 1973 TX650 that I got as a basket case. I have done a lot of work to get this thing road worthy but I could never get it to run quite right. Its the little details that count. I recently noticed that the mufflers that the po had on there only had a 1" diameter opening. I cant...
  14. Q

    New throttle cable adjustment

    Hey guys, I've purchased a new throttle cable and I've got the adjustment on the cable set to zero (meaning no stretch), but when I put it into my carburetor, it's holding the throttle really far open. I can't get the carb to idle at zero throttle with the cable installed. Am I missing...
  15. L

    Carburetor Troubleshooting - BS38 Flooding

    Hey All, I have been reading as many threads as possible on troubleshooting BS38's. I am still struggling. So i appeal to the forums expertise. - The bike kicks first time no trouble - Give it a little bit of throttle it sputters and dies - A small amount of black smoke comes out...
  16. TwoManyXS1Bs

    The mysterious Mikuni throttle plate numbers

    Measuring my XS1B's #125 throttle plates, plus #120 and #135 throttle plates submitted by DogBunny. Thought I'd share some of this trivia. Throttle plates are an oval shape, as though they were sliced (sausage style) at an angle through a cylinder. The width of a throttle plate is the...
  17. shade

    Leaking Petcock. Again.

    Now that I've got the bike running again the petcock is leaking. I ordered a rebuild kit http://www.ebay.com/itm/350957109557?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT. I followed the instructions here http://www.xs650.com/forum/showthread.php?t=20662 but when I installed the...
  18. B

    Bolt on 3+HP

    just installed and tested the 1-1/2" long aluminum carb intakes i made the other week for VM's. 3HP is probably conservative, according to seat of the pants dyno and newly slipping clutch. clutch used to occasionally let go in 4th under hard accel, but now 2nd through 5th and it's almost...
  19. jaydett

    what size jets should I use

    My carburetors have the factory jet sizes right now, and I am wondering what size I shoud go up to? I have removed the air boxes and installed uni pods and have replaced my mufflers with these http://www.dimecitycycles.com/chrome-16-inch-red-tip-shorty-slashcut-muffler.html. So Main jets are...
  20. fredintoon

    Removing the ethanol

    For those who are concerned about modern gas being ~10% ethanol, there's this kit you can buy that removes it:- http://www.ethanil.co.uk/ From what I can tell from the site there's nothing in the kit that couldn't be bought at a local hardware store at perhaps 1/4 the cost but it's...
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