compression

  1. platapuz

    Not firing and backfiring through carbs after electronic ignition installation

    Hey guys, Long time reader of these forum post but this is my first time posting I have a 73 TX650 that I just finished doing a bunch of upgrades on (mosfet regulator rectifier, battery, xscharge electronic ignition gen II, battery box, counterbalance seat, special tank with new paint, and new...
  2. aDotInTime

    Help! Trouble with Kickstart/Clutch?

    Hey everyone. I finally decided to get out from under my own fear of not knowing a god damned thing and ask for help. I have a '71 with a 750 big bore kit, HHB PMA, and Boyer's ignition. I bought it from a fellow last week and over the weekend dropped the engine into my bobber frame. I cut...
  3. DirtyErnie

    91 Octane build

    Looking for tips, spitballing a rebuild with new pistons. We can get 91 octane non-oxygenated/ethanol free gas is a lot of places, so I'm thinking about high compression for 91. I have a Hoos Racing Shell#1 cam, and a stock cam on the shelf. What sort of compression ratio should I be looking...
  4. B

    Compression help after PMA swap

    Hello everyone! I'm new to this site and, in fact, pretty new to riding as well. So, I have a problem I hope you can help with. I have a 1981 XS650SH that rode beautifully apart from it's typically lazy charging system. I bit the bullet and installed a new PMA from xs charge. Since I put the...
  5. DanielBlack

    Stella - 1977D survivor, back on the road.

    I've been having a great time over the last two weeks as I become further acquainted with my 77D, mostly stock, Stella. After the first basic safety checks and oil change, etc. I put her quickly into her role as my daily ride. Most days are 5-10mi, but the last week has given me a few longer...
  6. A

    good valve seat question

    Hey All, I am lapping my valves and they appear to have good seat with no pits on the valve or the head. When I place the valve in its seat and shine a light on the other side I see light come through when I put a flash light up to it. Do I need to keep lapping or will it seal tighter when...
  7. D

    Epic Fail :(

    Hey guys, So I got my newly rebuilt xs all wired up and went to kick it, nothing. I re-did everything on the bike myself (except rebuilding the bottom end) and thought "well, I probably screwed something up. I checked the float heights, good, I checked the carbs cleanliness, good (I am...
  8. H

    81' xs650, no compression, any ideas?

    I just purchased an 81' 650 that ran a few years ago according to the previous owner that has been sitting. I have been going through the motor to see if it does work. I am now at the point of compression testing and I am not getting a reading at all.:wtf: There seems to be a lot of air...
  9. G

    Lowering compression

    I've decided to lower the compression on my 79 special to 8:1 ala XSJohn. I see that quite a few people have done this. It seems that all I need to do is use two head gaskets and retard the timing by 2 degrees. Is there a favourite gasket that you all use for this? Any other tricks I might be...
Back
Top