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  1. 65fury

    4k stumble!!!! Im stumped!!!

    Hey there, you positive they are stock springs(about 8-9 inches i believe) I didnt drill the slides or do anything that was the PO and so far thats what seems to be causing all my grief, the slides open to quick. So im gunna throw some lager PAJ2s in(180s) and see if that helps lean it out, Im...
  2. 65fury

    4k stumble!!!! Im stumped!!!

    Id love to dyno it, but I only know of one dyno and i cant afford to go dyno tuning it right now, unless you got a dyno at home:biglaugh: im stuck using the old fashion dyno "seat of your pants" and listen to any odd noises:rofl_200: jason
  3. 65fury

    4k stumble!!!! Im stumped!!!

    155s??? thats only a hair larger than stock(152.5s) and the bike originally had 165s in it and it ripped!!! all i can say from everything ive done and experienced so far is changing the mains hasnt changed my mids ive kept the midrange stumble regardless of main size from 150s to 165s to 155s my...
  4. 65fury

    4k stumble!!!! Im stumped!!!

    Okay so i made a little bit of progress today, after spending some time at my local bike shop they let me use there good sync tool and i syncd my carbs after installing 155 mains. Even after the 155s the bike still had the 4k stumble, then we put softer and slightly shorter slide springs in and...
  5. 65fury

    speed wobbles!!!

    :bang head: ooops didnt do a two stage torque, ill definantly be looking at that after my bike is running right again, still chasing a mid range stumble, ive noticed tho that at WOT itll start wobbling around 90mph if im pulling back on the handle bars or if im not tucked down against my tank...
  6. 65fury

    4k stumble!!!! Im stumped!!!

    okay so i pulled the shim sto see if that would help the stumble and it didnt seem tomake much of a difference so i just put some 155 mains in(i woulda used 152.5s but the shop doesnt stock those so hopefully these work, gunna take it down and get it syncd and repor tback. also ill check my...
  7. 65fury

    4k stumble!!!! Im stumped!!!

    No... how do i do that? oh and i stopped st teh local bike shop that ive been going to for parts and ideas and they hooked there sync gauge up for free and even resynced the carbs(they were all off.. but i dot know why cause i used my two vacuum gauges and got them all perfect...????)so it ran...
  8. 65fury

    speed wobbles!!!

    Well i didnt torque those to spec, i had seen Morleys video on the bounce test so i just kept slowly tightening it till it didnt bounce. jason
  9. 65fury

    4k stumble!!!! Im stumped!!!

    It feels and sounds like its running lean, when i do the hard pull when studdering and then kill it and a pull a plug its tan... but its got the symptoms of being lean, its got this higher pitched popping like its a 2 stroke dirtbike and runs like its only firing on 3cyl. If i just whack it at...
  10. 65fury

    4k stumble!!!! Im stumped!!!

    No worries, yeah i thought they were too big too, but after swapping them out and putting the 150s in my top end didnt feel very powerful, and i still had my 4k stumble so i figured i try the 165s again since i hadnt run them with the kerker yet and i found my top end to feel much...
  11. 65fury

    4k stumble!!!! Im stumped!!!

    Well i dont know if he did a jet kit or just felt like playing with the carbs but the 165s in the carbs were mikuni, i tried 150 mikunis but my top end didnt pull as hard so put the 165s back in and my top end still runs and pulls great, im runnning a full kerker 4-2-1. Slide springs are stock...
  12. 65fury

    4k stumble!!!! Im stumped!!!

    I dont know the PO of the bike, i bought it from his buddy, but no other parts were changed in the carbs, stock needles all jets were stock except there were 165 mains. Stock airbox and when i bought the bike it had supertrapp slipons. I dont know what the guy did before to get the bike to run...
  13. 65fury

    4k stumble!!!! Im stumped!!!

    WARNING LONG WRITE Well im still having a horrible 4k stumble, regardless of gear im in anything over 1/4 past 4k and it falls on its face and stumbles its way to 6k where it pulls hard. I have stock needles, but the PO drilled the slides. Ive tried shimming the needles with .4mm...
  14. 65fury

    speed wobbles!!!

    yup sure do... but the bike did 120mph as straight as an arrow with ZERO wobble or anything! before i changed the tires and bearings and such, could soft front forks cause a wobble? cause i feel like they compress to much..... jason
  15. 65fury

    speed wobbles!!!

    New everything:biglaugh: bearings races even new grease:rofl_200: yup made sure they couldnt get seated anymore, ive done my fair share of bearings in the past. Im gunna try to lift the front end tomarrow and do the test how the handle bars fall again just to make sure. Jason
  16. 65fury

    speed wobbles!!!

    Well i read some post on speed wobbles and tried pushing against the handle bars at high speeds to stop the wobble and hey it worked!! but if i stop pushing the wobble hits, i dont like trying to do more than one thing at 115mph except staying alive:biglaugh: so what does pushing mean? it stops...
  17. 65fury

    speed wobbles!!!

    okay im an idiot, i looked at my rear rim again and its just grease thats slowly coming outa there:bang head: no loss of gear oil, i checked:biglaugh: so i guess i got a little grease happy when doing my rear drive assembly. Still havent checked for any play in the rear rim yet, still trying to...
  18. 65fury

    speed wobbles!!!

    Well the oil leak is back:damn angry: anyone know a good way to lift th ebike off the ground without a center stand? Although the oil smells like gearoil, but looks like grease:ummm: my gear oil was the regular clear bluegreen color, but whats on my rim is gray/black like the grease i...
  19. 65fury

    Sparkplug wire boots arcing!!!

    thanks Sean, if I cant get anything local or Yamamha wants to much for theres ill probably be doing some more buisness with you:biglaugh: But if i plan to leave this Wednesday then i gotta get this bike running!:punk: jason
  20. 65fury

    Sparkplug wire boots arcing!!!

    my auto parts stores dont carry just wire, they got different wire lengths but with the boots on them, will any automotive sparkplug wire work?? and i cant find any NGK boots locally, atleast until tomarrow when the motorcycle shops are open. Will automotive boots work?? if not why? thanks jason
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