high there...thankz 4 your help... the stumble seemz to be at around 5000 revs... is that still on the crossover point from pilot to main jet... the carb cleaner idea may work... although i'm not going to rev my maz to 5 grand on the stand... the yomama cleaner soundz good... is it not 4 bowl cleaning rather than passage de-gunking... i'll work away at it until i sort it... thankz 4 your help...simon... :) --- TC <[EMAIL PROTECTED]> wrote: > Simon, > IMHO ... 60-70mph in 5th is right around 3800-4450 RPM ... or right > around where you would be getting some more assistance, (fuel wise), > from the needles if you were cranking on the throttle a little more > ........ Holding a steady throttle though you are still pretty much > depending on the pilot mixture, (and of course some main mixture > sneaking around the closed slide needles depending on just how > "light" > a throttle you are applying ...). > > If this were an ongoing problem I would move the needles out a 1/2 > click or richen the pilot mixture just a little .. but since this did > not happen previously I am assuming you are just a little plugged up > in pilot - ville as you have suggested. For this ... I strongly > recommend giving the pilot mixture holes a blast of compressed air > ... > and/or a blast in the primary pilot air jet at the top of the carb, > (cover the carb with a rag if you do this at the top because fuel > will > fly out of the bypass holes just above the throttle plate and squirt > straight up in the air ... in your face ... ) ...... Of course .. > that > is exactly the guys we are trying to clear ............ > > Rey Kirkman has also posted previously that he has had success using > carb cleaner .... > > Rey wrote: > "My own experience is that blowing either air or carb cleaner through > the > pilot air jet holes is not every effective to restore a clogged pilot > jet, > though it certainly doesn't hurt and you might get lucky. Better and > almost > a sure cure is Yamaha Carburetor Cleaner, part # ACC-11001-43-00. > Cost > about > $5-7 for 32 oz. You drain the float bowls, and Yamaha makes that > incredibly > easy. Then a mixture of the cleaner and gasoline is introduced into > the > carbs via the hose entrance from the fuel filter. The tricky part is > getting the stuff into the carbs. I used an auxiliary testing gas > tank, > but I think a simple ketchup squeeze bottle or turkey baster would > work. > Yamaha suggests leaving the mixture in for an hour and then draining > it. I > think it needs more time, like overnight. Finally the stuff is > drained and > gas is reintroduced." > > You might want to try the easy way out first, (blasting), as it > usually does suffice for the occasional plugging ... or try the > cleaner or both ...... > good luck, > campbell > > > ----- Original Message ----- > From: "cybersymes" <[EMAIL PROTECTED]> > Subject: easy 'running fault' question...i hope... > > > > snip < > > when riding at a steady speed be it 60...or...70 mph... > > my 1988 max...hesitates then surges then stumbles > > snip < > > i replaced the in-line fuel filter and the problem has > > now appeared...i guess that a speck of dirt > > snip < > > my question is...which jet is in use while riding at a > > steady speed around 70mph... > > snip < > > ps...is there a carb cleaning 'cheat' i can use to sort > > this problem... > > snip < > > > ............................................. > To unsubscribe go to http://www.sayegh.org/unsubscribe.htm > ............................................. ===== peace...love...empathy.... live life to the max... :) __________________________________________________ Do You Yahoo!? Get Yahoo! Mail � Free email you can access from anywhere! http://mail.yahoo.com/ ............................................. To unsubscribe go to http://www.sayegh.org/unsubscribe.htm .............................................
