Search results

  1. J

    chainsaw question

    i agree with larry. two keyways sound retarded. lmao!
  2. J

    what caused this?

    looks like you had good and bad luck! did you mic the piston and cylinder before assembly? if so what was the clearance? or did you just trust the piston manufacturer and assumed cylinder bore size? it can bite u in the rear sometimes. a loose assembly will typically run fine (not seize) until...
  3. J

    oko 28mm

    hex. 6mm keihin. i get them for $3.75 each at my local bike shop. buy a few different sizes higher and lower at your next visit. its cheaper than the gas to and from anymore, plus you will have the extras for re-jetting at the dunes or in the mountains.
  4. J

    oko 28mm

    im running a 148 main on a similar setup. i have a bit of porting done though.
  5. J

    Question about mixing different fuels/gases

    i have a question considering octane ratings and the mixture of 2 cycle oil. when normal pump gas (87 octane) is contaminated with even a slight bit of standard motor oil, (example: a leaking intake valve seal on 4 stroke) it starts to drop the octane rating. in some cases enough to cause a ping...
  6. J

    Pipe design and theory

    i really enjoyed this article on pipe design. i love the science of horsepower and promote in depth understanding of the dynamics of tuning.
  7. J

    Pipe design and theory

    a consideration when experimenting with cleaning a used pipe is to refrain from abrasive blasting the internals as carbon buildup may trap sand particles and release them at the wrong time like during the back pulse into the cylinder. a dip in a "hot tank' may be a thought but will all but...
  8. J

    tuning my cpw oko 28mm

    ok, so i just finished reading the page from yellow dog on carb jetting(oops, sould have had that done earlier. it is a very valuable page) it doesnt cover the pilot jet issue as well as i would like tho. it describes symptoms and reactions to air screw adjustments but not to actual pilot jet...
  9. J

    tuning my cpw oko 28mm

    has anyone ever tried a long thin tube between the carb and reeds? say 2 inch or so. just curious what it might do. seems simple enough to experiment with
  10. J

    tuning my cpw oko 28mm

    good call on the erratic gas level. the tilt issue made me think of proper emulsion issues but not of a sticky needle and seat due to side pressure from the tilt. i wish yamaha hadnt attached the carb to airbox boot in the manner which they did. it is no fun removing the rear fenders just to...
  11. J

    tuning my cpw oko 28mm

    the richness factor i originally spoke of was top end. i will do a plug chop as soon as i can. funny how the neighbors dont care for a 6th gear w.o.t. pass by their house just so i tune my main jet! lol
  12. J

    tuning my cpw oko 28mm

    whats the scoop on these okos'. in general, the oko 28mm looks good. but i realize looks arent everything. a polished turd is shiny but do you really want one? before i spend too much effort on this carb i would like input from any experienced owners willing to comment. thx! this board rocks!
  13. J

    tuning my cpw oko 28mm

    from what i understand, if i use the vf3 reed block it will space the carb out far enough. is this true?what about a custom fabricated extension tube between the carb and reeds?(like the tunnel ram theory on my drag car). also i would like to have as much bottom end power as possible for tight...
  14. J

    tuning my cpw oko 28mm

    just got bike used(94 blaster) with fresh top end (supposedly ported, to what degree is unknown). cpw oko 28. fmf fatty w/powercore 2. k&n w/ open airbox. dont know what reeds yet. it had a 152 main and unknown pilot so far. the idle-air was turned all the way in. it was running rich so i...