The Journey is almost Over - Ducati.ms - The Ultimate Ducati Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 56 (permalink) Old Jun 13th, 2019, 5:06 pm Thread Starter
Senior Member
 
Join Date: Nov 2008
Location: DeLand, Florida, U.S.A
Posts: 238
Garage
The Journey is almost Over

OK I purchased this very early 1991 900ss on May 17 2019, It sat for a week before I could touch it. The biggest issue was a typo on the title, this was solved by registering the bike in Vermont that took about 3 weeks, This 900ss had not been ridden since 2002 so I had to do a few things--Here is the list--New Tires, new battery, new spark plugs, new oil & filter, brake & clutch flush, new belts, new tail light lens, new left combo switch, new fuel pump & fuel filter, clean & reline fuel tank (w/ POR 15) new fuel lines, complete carb rebuild w/ factory pro stage 1 jet kit, things that I didnt have to do but wanted-seat cowling, Carbon Tech high exhaust, K&N air filter-New speedo back to KM-(speedo had been changed to mph when the bike came to the U.S.only had 98m on it). Front Carbon Fiber mudguard from an SP. found 1991 original owners manual. ordered high pipe mounts & front frame brace from BBBFabrications, Cleaned and greased every electrical connection on the bike. This journey has taken about 7 weeks now-the amount of time I spend with tools in hand-about 12-15 hours Total $$ spent including the price of the bike-$2700.00 It started today for the first time in 17 years-tomorrow I finish-- whats left synch and adjust carbs put the 2 side fairings & seat on and go for a ride-tomorrows work about 30 min. when the exhaust hangers & frame brace arrive that should take about 30 min max to install, then it's time to ride and enjoy this very early production 91 900ss. I have been looking for one of these for about 7 years I had to find the right one at the right price and I think I did. Pictures will come probably within a few days. I want to thank everyone here that has helped me with advice and steering me in the right direction, Also I want to thank Sebastion at MelilliMoto he is close to me and he knows Duc's Like I know BMW's we help each other all the time.

1991 Ducati 900ss, 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
rennsportmotorrad is offline  
Sponsored Links
Advertisement
 
post #2 of 56 (permalink) Old Jun 14th, 2019, 12:16 pm Thread Starter
Senior Member
 
Join Date: Nov 2008
Location: DeLand, Florida, U.S.A
Posts: 238
Garage
OK I got the carb sync done -Rode the bike everything seems really good with only 1 [email protected] around 3K rpm the seems to stumble a bit and maybe load up-idle is good @ 1050rpm, under acceleration it is perfect-the only issue is the loading up/ stumble @ 3K--again I dont know these bikes very well but my first thought is to drop the slide needles 1 position. -Does that sound about right or someone that knows these bikes better have another suggestion. Any help is appreciated. Thanks in advance

1991 Ducati 900ss, 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
rennsportmotorrad is offline  
post #3 of 56 (permalink) Old Jun 14th, 2019, 3:49 pm Thread Starter
Senior Member
 
Join Date: Nov 2008
Location: DeLand, Florida, U.S.A
Posts: 238
Garage
Talked to the tech at Factory Pro this afternoon, told him what was going on. He told me to play with the air/fuel screw turn it out 1 turn see it gets better or worse, if it was worse-turn it in 2 turns-that would put me 1 turn in from where it was before I turned it 1 turn out--see if it gets better--if so turn it in 1 more turn--see what happens, So I did wound up going in on the screw it got better but still stumbling-I had the 40 pilot jet in that came with the kit--He said put the stock 37.5 pilot jets then play with the fuel screw-most likely turn it out about 2 turns to start and it should clean up--So now waiting for new 37.5 pilots. Hopefully this will clean it up and I'll be riding it --I did put about 12 km on it today just testing, Off the pilot it pulls like a freight train and is smooth. This is going to be fun

1991 Ducati 900ss, 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
rennsportmotorrad is offline  
 
post #4 of 56 (permalink) Old Jun 14th, 2019, 4:09 pm
Senior Member
 
Join Date: Jun 2017
Posts: 385
Your an inspiration, I'm on about hour 4 on my refresh, going slow as balls
Erics75218 is offline  
post #5 of 56 (permalink) Old Jun 14th, 2019, 4:30 pm Thread Starter
Senior Member
 
Join Date: Nov 2008
Location: DeLand, Florida, U.S.A
Posts: 238
Garage
Well when you have a 5300 square foot full service shop it helps alot lol--I have 6 lifts & 4 restoration benches, Ducati's are new to me--But I have been servicing & restoring BMW's for 35 + years so even though I have done very little on Duc's -mechanically it's not that big a deal to me --But it's the little crap that I am not used to that I have to play with and ask for help.

1991 Ducati 900ss, 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
rennsportmotorrad is offline  
post #6 of 56 (permalink) Old Jun 14th, 2019, 4:42 pm
Senior Member
 
ducvet's Avatar
 
Join Date: Dec 2007
Location: lakes region, NH, usa
Posts: 3,382
Garage
Images: 1
I think 3000rpm is considered Idle speed on mine. never tried using it muck under 3500rpm as i have a 50cc scooter for slow work.
ducvet is offline  
post #7 of 56 (permalink) Old Jun 14th, 2019, 5:12 pm Thread Starter
Senior Member
 
Join Date: Nov 2008
Location: DeLand, Florida, U.S.A
Posts: 238
Garage
Quote:
Originally Posted by ducvet View Post
I think 3000rpm is considered Idle speed on mine. never tried using it muck under 3500rpm as i have a 50cc scooter for slow work.
I normally am running above 3500 rpm as well but it just happens to be right where this bike runs around the small town and streets I have to travel, I have stock gearing on this bike I know I could change that but if the jets solve the issue it's a quick easy fix, If I were running 90 mph and up all the time I probably would not touch it but I just want it to be right so I can enjoy it.

1991 Ducati 900ss, 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
rennsportmotorrad is offline  
post #8 of 56 (permalink) Old Jun 14th, 2019, 8:39 pm
Prolific Poster Award
 
Join Date: Jul 2010
Location: Grass Lake, Mi, USA
Posts: 5,506
Images: 4
When I first bought my carby I thought thatís the way it was, they just didnít like it below 3000 rpm. After playing with the carbs, Factory Pro components, I was able to get mine to run smoothly almost down to idle speed . So it can be done, if you care to play with it. I was at a RV park for an extended stay and it had a 10 mph speed limit. I didnít feel like aggravating everyone each time I went for a ride, and maintaining 10 mph was impossible. The alternative was to tune the carbs well.

'96 Ducati SS900CR, '07 S4RS, '06 Busa, '77 Bonny,
'00 Superglide, '85 Sportster, '78 SR500
duc96cr is offline  
post #9 of 56 (permalink) Old Jun 14th, 2019, 11:35 pm
Senior Member
 
Join Date: Aug 2015
Location: Tucson, AZ, USA
Posts: 1,457
Garage
I have one of each of these descriptions, one lumpy but firm below 3000rpm's with FCR 41's / 39 tooth rear and the other stock carb I just put in a 41 tooth rear so it can spin the 4,000rpm minimum on a light flywheel it wants. Like an old married couple, I just stopped fighting it.

1991 900SS
1995 900SS SP #746
RockAZ is offline  
post #10 of 56 (permalink) Old Jun 15th, 2019, 12:27 am
Senior Member
 
ifly65's Avatar
 
Join Date: Mar 2019
Location: St. Louis, Missouri, United States
Posts: 203
Im really confused here. I guess the 750ss is different? I actually have a set of Mikuni's off of a 900ss with the stock jet kit for the 750ss. I can slow my idle as low as 900rpm (I have it at 1100). I have no hesitations up to redline. I am starting to feel lucky. Are the 900ss known to have hesitation/carb issues below 3000rpms?

Ducati 1993 750ss/cr
The past: Honda 1000RR Fireblade F2 Yamaha R6 xj700 xs400 Suzuki GSXR600 Kaw 750 550
ifly65 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ducati.ms - The Ultimate Ducati Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome