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post #51 of 56 (permalink) Old Jul 11th, 2019, 1:16 pm
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hey rennsport-

just a silly question...in addition to your SS burbling issue...in coming to a complete, quick stop (throttle closed) do you experience any down/up RPM differentials?

'95 900SS/SP , '07 SS800 , '98 VFR800 , '19 CBR650R
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post #52 of 56 (permalink) Old Jul 11th, 2019, 4:58 pm Thread Starter
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No once I get it dialed in with which ever pilot jet I am trying at that time-and whatever fuel screw setting I have-(depending on the pilot jet size)--I Have a nice steady idle. from say 7K rpm chop the throttle and it comes back down to a nice idle within 2 sec-thats how close I can get it. --but again I am a BMW master Certified Tech--if I had a BMW doing this it would be freeking nuts. maybe I am being too anal retentive -Sebastian from MelilliMoto is a good friend of mine, he says it's fairly normal--I cant accept that--again I can hear the burbling but I cant feel it--I have to figure this out and dial it in where I am satisfied where everything is nice and smooth from idle on up .

1991 Ducati 900ss-Euro, 1991 Ducati 907ie. 1978 Yamaha SR500, 1979 Yamaha RD400 Daytona Special, 1973 Truimph X-75, 1975 Triumph T-160, 1976 Triumph T140, BMW's too many to list
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post #53 of 56 (permalink) Old Jul 11th, 2019, 5:05 pm Thread Starter
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If and when I get this dialed in where I am happy--I am going to post every single thing that I have done to the carbs-including all jet sizes emulsion tube's, Slide Needles, Fuel screw settings, stock or modified airbox cover etc. -Now of course all my info will be for dead sea level in Florida and my air temp here will be around 93 deg. F, So if your in Denver Co. my info will of no help to you lol-but since 75% of the population lives within 100 miles of the coast then it may help the majority of the people. This is now a personal issue to me --The motorcycle will not win--I will----Damn It

1991 Ducati 900ss-Euro, 1991 Ducati 907ie. 1978 Yamaha SR500, 1979 Yamaha RD400 Daytona Special, 1973 Truimph X-75, 1975 Triumph T-160, 1976 Triumph T140, BMW's too many to list
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post #54 of 56 (permalink) Old Jul 16th, 2019, 11:19 am Thread Starter
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OK I finally have this 91 900ss dialed in, I will just give you the info on the carbs because thats where the issue was--I run nothing but 100 octane LL non-ethanol fuel-I am in Fl. so dead sea level. The burbling is gone idle is good @ 1000 rpm. & pulls like crazy. I do get a little popping thru the exhaust but only during decel, which I would expect with the Carbon Tech pipes & K&N air filter. so here are my numbers.--Factory Pro Stage 1 jet kit, using-135 main jet, 40 pilot jet, Factory Pro plated emulsion tubes, slide needle 2nd groove from top, float lvl set to 15mm, fuel screws 4 turns out. using K&N air filter and stock air box lid non-modified. So now I have but one thing left to do---Ride the piss out of her. Thanks to all here that have helped.
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1991 Ducati 900ss-Euro, 1991 Ducati 907ie. 1978 Yamaha SR500, 1979 Yamaha RD400 Daytona Special, 1973 Truimph X-75, 1975 Triumph T-160, 1976 Triumph T140, BMW's too many to list
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post #55 of 56 (permalink) Old Jul 17th, 2019, 11:45 am Thread Starter
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OK went for a little ride this morning, The burbling is gone and is smooth BUT at low speed 35 mph throttle barely cracked open I am getting a little rattling ( sounds lean on the pilot) So I have now ordered a new set of pilots now have a 40-fuel screw out 5 turns-- and I am going to a 42.5 hopefully this may solve the lean issue--I'll let you know once I get them in. -Thought I had it dialed in but not quite there -But real close

1991 Ducati 900ss-Euro, 1991 Ducati 907ie. 1978 Yamaha SR500, 1979 Yamaha RD400 Daytona Special, 1973 Truimph X-75, 1975 Triumph T-160, 1976 Triumph T140, BMW's too many to list
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post #56 of 56 (permalink) Old Aug 18th, 2019, 3:56 pm Thread Starter
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OK I went for a nice 150 mile this past Monday, She seems dialed in about as perfect as you would want-low speed no stumble or burbling any more, throttle rolls on nice and smooth rode most of the way at around 75-80 mph but did open her up 6 times just to test -pulled hard all the way up I backed off at 125 mph but she was still pulling hard, so the carb numbers are --pilot jet 42.5, main jets 135, Factory pro slide needles 2nd groove from top, Factory Pro nickel plated Emulsion tubes, float levels set @ 15mm.& Fuel screws out 2 turns- This is the perfect setup for my bike-But the bike is a European model Not a North American bike and The carbs I know are basically the same but the Euro carbs do have slightly different numbers, & the 42.5 was the stock pilot in these carbs. My fuel mileage for this trip was between 35 & 38 mpg which is right where I would expect it to be. So for the running of this bike I am done for now, So now one more little thing I am doing -I purchased a solo tail piece with a Corbin seat on it -the price was right so why not lol
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1991 Ducati 900ss-Euro, 1991 Ducati 907ie. 1978 Yamaha SR500, 1979 Yamaha RD400 Daytona Special, 1973 Truimph X-75, 1975 Triumph T-160, 1976 Triumph T140, BMW's too many to list
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