engine question

  1. kevxs

    RH side running hotter than LH

    Hi guys new too this site and new too Yamaha xs650. Great site and info. Have run an old 1983 gs1000e for a few years now gone and fancied a new experience. Bought a 1978 XS650 and slowly polishing painting and modding this winter a flat tracker here in Essex. Problem. Starts OK but after...
  2. T

    mikes XS performance cam?

    hay guys just wondering if any one has one and if it worked out good for them, noticed a difference...also if it was worth the money? :shrug:
  3. C

    What is the propper procedure for compression check?

    I'm looking for information on the proper procedure for doing a compression check, and a general idea of the minimum amount of compression I should be getting.
  4. D

    TIMING problems,

    hello all, new to the forum and xs650s, I bought a basket case 77xs to build into a swing arm chopper, I had to make the wiring harness, as the bike pretty much came with engine frame front end and wheels, The problem i am having is the right cylinder is shooting flames thru the carb...
  5. superdave

    Engine help

    So I just purchased a 1981 Yamaha xs650 custom bobber. Everything was great until I was going down the road and the engine power kind-of hiccupped? It was as if I abruptly rolled off the throttle except I didn't role off the throttle. It was then followed by a complete loss of engine power and...
  6. F

    oil pump removal

    O.K., we're getting it.... I took one of those screw drivers that has a ratch spring inside.... hit'er a few times and got the screws loose......screws are out. what would be the trick to removing that top part of the oil pump then ? Like, Gary, says "no gaskets", so should it just like...
  7. xs65021972-70

    engine type

    What is the difference in engine types 447-533 is it just the year or is there a difference
  8. eosdelb

    shifter shaft replacement (spline worn off)

    Hello everybody, I need to replace my shifter shaft. I looked at the Haynes book and really dont know any more than before. What I want to know is, Can you swap them out without splitting the case? It looks like you take the covers off both sides but I am not certain. If anyone has done this...
  9. K

    Interchangability -or not -of bits.

    I haven't even got a starting point yet but I'm wondering how interchangable bits from different models/years are. (e.g.) If I buy a bottom end what barrels & heads can I use, etc?
  10. jazzyrigged

    Valve Timing issues

    Over this past winter I tore down the engine on my 78 special and replaced all of the gaskets on it. I have reassembled everything and found that air is blowing outward from the carbs mount and sucking inward from the exahust, completely opposite of how things should work. Could I have the...
  11. B

    Tacho drive

    Hi All, Having to do an engine swop as there is a horrible bearing type noise coming from somewhere. I will investigate it eventually. In the meantime I have acquired a 1980's engine, but it has a blanking plug where the mechanical tacho drive goes and no locating hole in the bottom of the...
  12. cheftay

    What to do with an newly rebuilt engine...?

    So i've just finished my engine rebuild and got the bike running yesterday and now all I want to do is RIDE! But i'm sure theres some things that I should take care of before I go crazy with it.... I just don't know what all of those things are(ie. break-in, oil changes/pressure, compression...
  13. Tim L

    Xs2 engine

    Hi all, My XS2 engine leaks more oil than Iraq, so I am going to get a second engine to overhaul over the winter and fit for next summer. Are all XS engines compatible? I am thinking fittings, electrics, ignition, etc. Any advice gratefully recieved. Tim.
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