26 April 2020: Installed STM
Clutch Slave Cylinder
15 February 2020: 30,000
Mile Service begins. Decided to do valves with heads off the ST4s,
and so also decided to pull the engine, swing arm, etc. Spent some
quality time removing carbon from the piston, heads, and valves, in
addition to lapping the valves, and then resetting
Completed leak down check with new OEM head gaskets installed.
Vertical Cylinder held at just
under 4% loss and Horizontal
Cylinder held also at just under 4% loss. (96+ psi at 100 psi
water pump cover/housing inspected the rotor, all intact, no corrosion.
Water Pump Rotor visual inspection and check for shaft play or free spin, all in
Removed all the silicon hoses and checked them over, replaced the
thermostat with Ducati OEM and replaced water pump cover / housing with
SpeedyMoto unit. Pulled radiator, removed fans (I have a second
fan installed on right side), then straightened
bent fins. Soaked radiator exterior in hot soapy water to loosen debris and
bugs, thorough rinses, and compressed air to blow out debris from the
Visual inspection of radiator interior, no apparent indications of
corrosion. Flushed with white vinegar and multiple rinses of
distilled water. System refilled with Engine Ice coolant. Ducati Performance Air Filter and K+N crank case vent cleaned and dried, re-lubed with K+N
filter oil. CA Cycle Works Exact Fit Belts. New Ducati OEM
oil filter, and Shell Advance 10w40 synthetic oil. NGK Iridium Spark
Plugs. Nice exterior cleaning of the engine. Replaced three
bolts holding upper chain slider on the swing arm. Re-lubed the
case bearings for swing arm attachment. Replaced rear wheel
bearings (SKF 6005-2RS1/C3) (dims OD 47mm x ID 25mm x thk 12mm) based on
mileage. Replaced rear sprocket carrier bearings (SKF 6006-2RS1)
(dim OD 55mm x ID 30mm x thk 13mm) based on mileage. Removed fuel
flange assembly from the fuel tank, replaced submerged hoses with
Gates 27093 Fuel Line (30R10), safety wired the
hose clamps, spanning short hose at outlet to the clamp and fuel filter
hose inlet. Fuel flange, pump, filter
assembly photo here:
Replaced fuel flange O ring with new Viton O Ring.
25 December 2019: Merry
Christmas! New EVR clutch cover.
2 November 2019: New EVR
Clutch Basket, Clutch Pack, and Pressure Plate installed. I am very please with the
feel, performance, and look!
13-18 October 2019: Fourth
Annual October ride with Kelly Hines, this time we went to Arkansas.
Since he moved to Oklahoma City, Arkansas is close to midway between us,
about 6 hour trailer pull to Russellville, AR where we based for the
week. Great time riding in the Ozarks, covered the highlight roads
by doing about 340 mile loops each day. We also made sure to cover
Talimena Drive into Oklahoma and returned. The ST4s did great,
brakes felt super, although they are noisy at very low speed as they
moan to a stop. My clutch gave its last full measure! After
29,900 miles, it was spent, not a bad lifespan for the clutch pack and
basket. I noticed increasing difficulty in
downshifts and finding neutral at a stop. Thought that maybe I had
introduced air into the the line but, when I got home and inspected the
clutch pack, it was obvious. A few of couple of the friction disks
had completely lost the friction material and just the aluminum alloy was engaging the steel plates, LOL I can't believe that it didn't
start slipping under higher loads. A new EVR 48T basket with plates
is on its way! Think I am going to spring for a new pressure plate
too (EVR) and maybe an open EVR cover for the local riding on nice days,
switching back to my carbon cover if it looks like a long trip with
probability of rain.
8 September 2019: Front
wheel bearings replaced. Test ride completed. Overall, I definitely feel
improved braking and less shudder / judder vibration under braking in my
' 02 ST4s (w/ 28,200mi). The replacement of my front bearings was not
difficult, key is locating the notch in the spacer and then working the
drift around to keep the bearing square on removal. The old bearings
seemed fine, as I inspected them again after removal, no axial or radial
play, no rough or sticky spots. After installing the All Balls front
bearings, I noticed a slight improvement in the reduction of vibration
under braking. BTW, I never noticed pulsing at the lever, still don't.
All brake testing is with clutch lever pulled in, and clutch
1. Under aggressive braking, as I pass 60 MPH, I get a brief bit of
vibration, which disappears before the speedometer needle pass through
55 MPH. It is transient and much less pronounced with new wheel
2. Under light braking, I can pass through the 60 MPH window with no
vibration / shudder / judder.
3. After acceleration, and then without braking, just coasting with
clutch lever pulled, there is zero vibration at any speed. If I begin
braking at 55 MPH or slightly faster, I get no vibration.
4. The vibration now seems associated with approx 60 MPH indicated and
firm braking application.
I am going to call it done - I'll give it a 98%...the Brake Tech Axis SS
Rotors are a major improvement helping get rid of the shudder / judder
that progressively manifest with the OEM Brembo Snow Flake rotors.
15 August 2019: Fitted BrakeTech
Axis Cobra Stainless Steel full floating front brake rotors and
recommended FERODO ST Front Sintered Brake Pads, to the ST4s expecting
to get rid of the braking shudder / judder that crept in over the years.
The honing and work on the stock Brembo snowflakes didn't get rid of it,
so resorted to new rotors. If this doesn't do it, then I don't
know what the problem is!
17-26 Jun 2019: Completed
2210 mile trip on ST4s from Home to Charleston WV, Downingtown PA,
Manheim PA, up to Watkins Glen NY for 4 day race weekend then to
Youngstown OH, Lexington KY, and back to home! Great time on the
trip! For the most part, it was free of rain (only about 4 hours
total of wet riding, predominantly in WV).
19 May 2019: Honed front
brake rotors to see if I can get rid of the front brake shudder or
judder o whatever you call that annoying vibration in the front end of
the ST4s under braking. Used a medium, Flex-Hone Tool bought on
Amazon by Brush Research -- Flex-Hone For Rotors. Also mounted up
a new rear tire for the ST4s, Pirelli Diablo Rosso III. I think
that I should have gone back to the Rosso II for the rear tire but I
forgot that intention when I ordered it on line. Also put on a new
front tire, Pirelli Diablo Rosso III in anticipation of an upcoming
12 Jan 2019: Designed and
fabricated an engine stand...will hold most all Ducati engines, and
holds the three I am concerned about, the ST4s (996), S2R 800, and 998
engines. Drawings and images are on the
Mods page. I used
SketchUp for the design and model.
26-27 Dec 2018:
Accomplished some winter maintenance tasks: completed install of new
Voltage Rectifier Regulator, also installed a voltmeter onto the
instrument cluster. Replaced the neutral switch that had failed,
it was worn down and no longer making contact inside the gearbox when in
neutral. Cleaned up my electrical distribution bus bar.
Pulled the fuel tank, replaced the fuel filter and inspected the
interior of the tank thoroughly, still looking good!
1-5 October 2018: Annual ride in East
Tennessee, Western North Carolina, and Virginia; super lucky with
weather and the BRP was completely open, even though the south/western
end was recently tarred and chipped, road was in great shape, as always
so was the Cherohala and HWY 129. Had a great time visiting my
cousin on the way back, a beautiful log home high on the mountain
overlooking the upper Nantahala River.
Kelly and Me on the Blue Ridge Parkway at the Lane Pinnacle pull off, 3890 MSL,
3 October 2018
1-6 October 2017: Second annual
Autumn ride of the Blue Ridge Parkway! From Chattanooga, to
Robbinsville, NC then through HWY 129 (Dragon) North and South over to
Cherokee and onto BRP all the way to North end (start point), back down
BRP to Cherokee again, and back to Robbinsville and then on to
Chattanooga TN, to reload and slab it home. Over 1500 miles
covered and a great time! New back tire along the way, Thank
you Wheeler's Performance
in Robbinsville, NC... great job, fast and very reasonable
fairly warm coolant temps at idle when weather was warm and but with the cold mornings
ST4s was cranking
a little slower that I expected; otherwise starts have been strong since last
year's battery replacement. Fantastic trip!!!
January 2017: Winter time
and should be doing some maintenance but work and helping wife recover
are keeping me out of the garage. Also, spent some time getting my
server upgraded and now contemplating the forlorn Ducatiwiki.net .
The host appears dead, think it was a German hosted site. Not
much info but some web back up pages via way back machine (web.archive.org)
but you can only save the top level of the wiki and then have to
manually execute the links and attempt to save those pages...time
consuming approach. Also, sadly the
ST FAQs site of Perry
Rosenboom has been down for a long time now and I have no idea how to
reach him or the current copyright holder. Would love to freshen
that document up. Yahoo Groups ST List is still running as is the
Duacti.ms forum but participation seems down as these bikes age and with
them the Ducati ST genera. If you hit this site and are interested
in seeing the wiki resurrected, let me know via grimah1w at hotmail dot
Want to keep these sources of information alive!
October 2016: Lots to catch
up on, ahead of the 1-4 October Trip (Chattanooga to Robbinsville, NC,
to Boone NC to Renick WV, to Chattanooga:
20,500 miles / 27 September 2016 service : New front and rear
tires (Pirelli Diablo Rosso II rear and III front)
2. New Yuasa Battery (cascaded two year old
battery to 998s FE)
3. Oil and Filter. K+N 153 filter
and Mobile1 20w50 V-twin (I don't think I will use that again,
like the Mobile1 4T racing better)
4. Added Right Side cooling fan, relocated
manual fan control switch
5. Added aux electrical buss, switched power for
a 30A relay controlling the buss.
6. Belts replaced -- Exact Fit -- tension set at
Great trip with Kelly Hines covered over 1000 miles,
perfect weather, lots of fun!
February 2015: Tapered
roller bearings, purchased the bearings from DesmoTimes but, ordered
Ducati OEM seals and an extra thrust washer after reading all the
traffic and advice about the seals that come with the AllBalls tapered
roller Bearings. The seals that come with the kit just do not look
right an apparently if not installed backwards (up lip facing down) then
the seal will tear and fail. I am not convinced that they wont
fail if installed in that manner either. Full report and
documentation will be posted on the mods
February 2015: Installed DD headlight, big improvement although I still do minimize night time
In late January 2015, I sent my rear Ohlins
shock and the Showa forks off to Cogent Dynamics for rebuild/service,
heavier duty Ohlins rear spring, and for the forks, the Ohlins cartridge
and stiffer Race Tech springs.
Receipt and list of materials, here. Looking forward to
mounting them up and getting them dialed in. For now, it is cold
and winter maintenance tasks continue!
July 2013: FYI entry=> I rate
the service at Bloodworth Motorcycles BMW/Ducati of Nashville, TN as poor.
Have yet to have a positive experience with them and my Son's most
recent experience (end of July 2013) was again very poor. It is
first and foremost a BMW dealership. Service department is rock
bottom for Ducatisti. It has spurred me to work harder on my competency as a Ducati
maintenance tech without formal schooling, for that I guess I can be
8-13 May 2013: Big ride, ECM at Fontana
Dam, NC then to V.I.R. near Danville, VA, then back through Ashville, NC
to home. Beautiful weekend, great weather, cool in the mountains,
just the way it should be!
29 April 2013:
Tires mounted front and rear, Pirelli Diablo Rosso II front 120/70ZR-17
and Pirelli Diablo Rosso II rear 180/55ZR-17. Motorcycle
Superstore (117.99 / 147.99) respectively, free shipping! :-)
DIY checklist and task list here.
Added SW Motech Tank Bag along with electronic power ring to the ST4s
(as well as for the 998). SW Motech is a German company and I was
fortunate to have my friend in Germany purchase the items for me and
send to the USA. ThrottleMeister is US distributor but their
markup is pretty significant. The model I purchased is no longer
available (as of 2017) but similar capabilities are still offered.
I really like the bag a lot and having 12V supplied to it is very nice
for extended travel, water proofing is great too. I did make a
minor modification to the bag, adding some aircraft aluminum to the
interior base to stiffen the bottom of the bag and keep it well clear of
the tank when loaded.
17/18 August 2012:Have been
dissatisfied with running temperatures of the ST4s so I have replaced
most of the cooling system components: new hoses (red silicone from Desmo
Times), new Thermostat, Ducati OEM, new Engine Ice after flushing and
rinsing with vinegar and two distilled water rinses. Inspected the
water pump impeller, visual inspection was normal, no corrosion, no
damage to blades, and not sure what else to look for. System
refilled and burped etc. Fitted the Ducati Designs Headlight
(finally) from Paul Geller. Great kit. easy to accomplish.
Used two washers that were not supplied to raise the DD headlight inside
the Ducati headlight housing to center it in height when the nose
cowling/fairing was installed. ~1/16 thick washer made the gap
even all the way around. Works fine even with the headlight
Gizmo installed, so now I have a headlight that actually works and it
comes on after I shift from neutral to gear so no drain at engine start.
Also installed new sprockets and chain combo. 525 D.i.D. with 15T
front sprocket and and 42T rear. Got the D.i.D. chain combo tool
with it...anyone need a 525 chain done??? Lastly, replaced the
stock ride height adjuster with an aftermarket (non-seized) link, looks
nice and rear ride height is now set so that the rear wheel is ~10mm off the ground
when the bike is on center stand.
DIY checklist and task list here.
7/8 February 2012: Valve adjustment, belt change,
coolant change, spark plug change, oil and filter change. All
completed with no issues. Valve clearances were checked and were
well within specifications. Belts replaced and set to 110Hz.
DIY checklist and task list here.
19 November 2011: Returned from
overseas to a gift from the wife, nice DP Carbon Fiber inserts to
panel...have been wanting then for years even more since they pretty
much went unavailable...she found a gent in Australia who had them in
stock and now they are mine an installed!!! Photos soon!
Also received my shipment from LT aka Doc Snyder at Desmo Times!!!
My winter maintenance program will make for some fun hours tearing the
ST4s down and doing Belts and valves!
10 November 2010: ST4s has been a
treat to be on lately here in middle Tennessee. The Scala G4
communications system has been a real nice addition! My wife
really enjoys the ability to talk a little on the ride, pointing out
some of the wonderful sights we see on our treks.
2 October 2010: Last day in Tampa! Moving
back to TN. ST4s is packed up, blocked, braced and locked in a
Baxley wheel chock stand.
17 April 2010: Sorry for the
absence and lack of updates! Purchased a Rizoma timing belt cover
for the ST4s. Would like to see more of it than is visible with
fairing installed but what I do see I like! Photos of it in
Modifications. That ride in
September alluded to in paragraph below was awesome. Would rather
have been on ST4s for some of it though! The 998 got a bit
fatiguing after second trip through Hwy 129, 1st and second and the
front tire had given its best work on the Cherohala Skyway. Now
its profile looks like a triangle. Anyway, back to the St4s!!!
Tampa starting to heat up. I have noticed that the thermostat
housing gives up a drop or two of coolant but is not coming from the
hose connections. Have triple checked them, tightened, reset,
retightened and still after a warm ride, the same result...almost like
it weeping through a crack??? not visible to naked eye. Will
update once I get that sorted. For now, after a ride, I park and
next day see a small contribution of coolant to the floor of my garage,
about the size of a dime.
13 Sep 2009: still hot as ever here in Tampastan. Rainy season still in effect, it will probably be a
couple more weeks until it is reasonably temperate and dry enough to
take the ST4s out and stretch it out some. Planning to spend last
half of last week of September in Knoxville, TN area with the 998s FE
and ride the hills with Ben and Steve, then catch UT football on that
Saturday. Hoping for good weather!
24 Jan 2009: fan modifications applied
to my St4s! Purchased LT Snyder's six bladed aluminum fan and
placed a single pole single position switch into position between 12vDC
lead at fuse panel and the fan's positive lead at the connector.
See Mod Page. Also, learned that GIZMO folks' website is offline.
Not sure how to reach them for those wanting the Headlight Gizmo shown
on my Mod page. Sorry.
2 Nov 2008:
temperatures have mellowed here in Tampa and now the humidity/high temp
factor is gone, I can get the ST4s out and stretch the legs some...dang
roads are straight as arrows and filled with cage drivers. Have
found my way over to Euro Cycles of Tampa, nice shop, good folks.
Sep 2008: Moved to Tampa FL. Brought ST4s with
me but left the 998s behind in TN to stay at the house. Doing
split base operations for now. It is way to hot here in Tampastan
to do much riding this month, looking forward to fall.
May 2008: Front tire replaced with a
Diablo Corse III. Also scored a Sargeant Seat on a very good deal
from Alain at Corse Motorsports who had a customer who wanted to sell
his (still in wrapper from Sargeant). Unfortunately the owner who
had planned to put it on his ST3, had a motorcycle mishap and was
selling his ST3 and all bits. Fortunately he is OK and recovering
April 2008: another trip to the Dragon,
HWY 129 and point beyond, including the Cherohala Skyway, it was a
beautiful ride and now it is time for a new front tire :)
28 Oct 2007: - Wx cooler, ST4s is all
reassembled. I pulled all the body work before sending it in for
the 12K service, saves time and money :) After getting it back
from Alain's I did a thorough cleaning of the body work that had been
hanging in my garage and put her all back together; looks great!
27 Sep 2007: 12K service completed :) Once
Alain Ledgerwood mechanic and owner of
Corse Motorsports in
Nashville did a great job. It was also very reasonably priced.
Great job Alain and Corse Motorsports!
22 April 2007: - Plenty of developments,
My 998S FE is freshly serviced (6000 miles) and has new Michelins front
and rear; total price ~$1300. The ST4s is coming up on its 12,000
mile service, these get pretty expensive, so I am in a bit of a delay.
Steve has undertaken a major project and successfully converted his
Matrix 620ie to a Matrix 800 S2R. It is pretty awesome. Now
he has the look he wanted and the power he had been searching for, plus,
it is a one of a kind. I have done a bit of re-organization of this web site
and added web space dedicated to
Steve's Matrix S2R 800
and the 998S FE.
19 November 2006: -
LCD Module partial
failure and repair. I disassembled the LCD display module and
repaired it today. Found water inside and corrosion of the circuit
card. Dried the interior of the housing, removed the corrosion, an
resealed the unit... it is working perfectly again!!! WOOOT!
See photos and description of the repair in the Maintenance and Issues
2 November 2006: - For my birthday, I
notice that my LCD display is now only functioning partially, hurray!
1 October 2006: - Purchased a 2004 998s
Final Edition. It sure is pretty.
September 2006: - Back to East Tennessee the Dragon (hwy 129) and Cherohala skyway. Weather was a bit uncooperative. A bit
damp in a few corners on Hwy 129 but it did not spoil the fun.
Different story on the Cherohala when we got to 4500' MSL we punched in
(aka clouds obscured vision if we had been flying an aircraft it would
have been instrument meteorological conditions (IMC)). By the time
we got to 5000' MSL it started to rain in addition to being cold and
very windy. We donned the rain gear and my son on his Monster and
I on my ST4s crept along until the descent an then in the valley we rode
home in the rain. Couple of photos are on the
photo page taken while we were still in nice weather. The next
day it rained like crazy although we still went and watched University of
Tennessee (my older son Ben is a student there) defeat Marshall.
It was a fun trip!
10 June 2006: - New Pirelli Diablo Corse
front tire. Saw Alain at Corse Motorsports again, this time for a
front tire and time to pick up oil and a filter. 9000 miles
changing oil and filter. Using
Mobil 1® MX4T 10W-40.
14 May 2006: - My son
purchased a 2004 Ducati Monster 620i.e. "Matrix Edition" from a Grad
Student at U of Illinois. Great looking machine!
6 May 2006: - Added this block after
returning from East Tennessee and riding some of the magnificent roads
there. My son and I had a great time! The highways of
Tennessee have gained notoriety for being maintained in superior
condition, all the roads we traveled in TN were great. Not quite
to the standard of German roads but in most cases much better than say
Northern California. Nice black top, great terrain, so many corners it
felt like we were riding in loops at times. We rode the
Skyway and on to US Highway 129 through Deal's
Photos from the trip are on the photo page.
30 Apr 2006: - New back tire,
sticking with the Diablo; preparing for the trip later this coming week.
Corse Motorsports, did me right.
20 May 2004: -
6000 mile service also replaced steering stem bearings and seals (Ducati
Warranty) service total $534.
May 2002: -
Purchased 2002 Ducati ST4s from Sonny Collier, of Collier Ducati, in
Nashville, TN. (Sonny eventually sold his Ducati dealership and
after passing through a couple of hands it wound up with Bloodworth BMW
and Ducati in Nashville.) I rate Bloodworth service as meh.