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Old February 17th, 2022, 10:32 AM   #201
DannoXYZ
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Quote:
Originally Posted by ducatiman View Post
back on a set of especially nasty 250's today. Overtightened bowl screws needed dremel action to remove, as did all 8 brace screws. Badly discolored brass, clogged jets....yada yada. Completed pics to follow when completed.
Sounds like horror-movie of carbs!!! Post lots of photos in progress. I'll make video and set it to soundtrack! ...
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Old February 17th, 2022, 03:14 PM   #202
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sorry, the video production will need to wait for another set. Due to restricted time, I snapped NO before pics and just 3 afters. I'll post 1.

Of course I HAD to make time to drill out and tap a stripped carb top thread, using a 5mm thread bolt in place of the 4mm stocker.

Getting busy already, an EX500 in my garage for carb and valve clearance services. Sat for 4 years prior to a local student gaining ownership.
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Old February 18th, 2022, 11:19 AM   #203
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Quote:
Originally Posted by ducatiman View Post
sorry, the video production will need to wait for another set. Due to restricted time, I snapped NO before pics and just 3 afters. I'll post 1.

Of course I HAD to make time to drill out and tap a stripped carb top thread, using a 5mm thread bolt in place of the 4mm stocker.

Getting busy already, an EX500 in my garage for carb and valve clearance services. Sat for 4 years prior to a local student gaining ownership.
Sound like fun
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Old February 18th, 2022, 01:57 PM   #204
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doing a set of (4 years dormant) EX500's carbs today......here's visual documentation of some built up poop

given more time, this crap (varnish) would turn brown.
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File Type: jpg ow2.jpg (89.3 KB, 5 views)
File Type: jpg ow4.jpg (101.6 KB, 7 views)
File Type: jpg ow5.jpg (109.4 KB, 7 views)
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Old February 18th, 2022, 02:33 PM   #205
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Quote:
Originally Posted by ducatiman View Post
doing a set of (4 years dormant) EX500's carbs today......here's visual documentation of some built up poop

given more time, this crap (varnish) would turn brown.
Look like you caught it just time that look like just after 1 year of just sitting around with Gas Stabilizer but will end it will turn in crystal state.

Last futzed with by shspvr; February 21st, 2022 at 03:12 AM.
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Old February 20th, 2022, 11:40 AM   #206
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MOTM - Nov '18, Mar '17
Now completed, slight improvement, IMHO. Bike in my possession, starting sequence to commence soon.
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File Type: jpg ow8.jpg (95.2 KB, 4 views)
File Type: jpg ow10.jpg (87.2 KB, 3 views)
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Old February 20th, 2022, 07:14 PM   #207
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MOTM - Nov '18, Mar '17
experimenting (within a deep learning curve) on my new injector cleaning/testing machine this evening
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Old March 7th, 2022, 04:34 PM   #208
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MOTM - Nov '18, Mar '17
invested $35 in a set of used (complete) throttle bodies (strictly as spares) for my SS800 Ducati twin. Discovered 1 intermittent firing injector...no biggie I've got spares.

Well worth the investment, I believe.

During disassembly and split, I retained all settings. In the process of renewing fuel feed lines, requiring some special parts and attention.

Before/after pics.
Attached Images
File Type: jpg inj13.jpg (91.9 KB, 2 views)
File Type: jpg inj14.jpg (106.2 KB, 1 views)
File Type: jpg inj15.jpg (87.0 KB, 2 views)
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Last futzed with by ducatiman; March 8th, 2022 at 11:25 AM.
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Old March 20th, 2022, 02:11 PM   #209
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MOTM - Nov '18, Mar '17
completed a REFURB of a set of BSDT38 Mikuni's off a Ducati 900SS/FE today, basically returning them back to stock spec.
Findings included: 150 mains (replaced with OEM supplied 140)
pilot screws backed out 5 (!) turns, returned to 3 1/2 (more normal starting point for Ducati spec)

As current owner is replacing airbox top with a stock unit, he found a basically removed (drilled/modded) cover upon purchase, the PO in an obvious search for "more fuel/more air".

Standard for these Mikunis, I found ovaled emulsion tubes (replaced with new). This condition is known to cause uncontrollable rich running.
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File Type: jpg NIC3.jpg (98.7 KB, 4 views)
File Type: jpg NIC5.jpg (86.1 KB, 6 views)
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Last futzed with by ducatiman; March 20th, 2022 at 03:42 PM.
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Old March 30th, 2022, 06:22 PM   #210
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MOTM - Nov '18, Mar '17
a set of EX500 carbs completed today.
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File Type: jpg FUS4.jpg (110.6 KB, 4 views)
File Type: jpg FUS5.jpg (106.5 KB, 4 views)
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Old March 31st, 2022, 05:25 PM   #211
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MOTM - Nov '18, Mar '17
currently doing 250 ninj carb set & petcock refurbs.
(attached pic of completed, functional petcock, carbset to follow)

Petcock got 1 new mesh filter (upper), all new orings (was able to reuse diaphragm, with new, small oring installed o'course). It tested perfect as OFF seals, ON + RESERVE only flow when vacuum is actuated.

Rebuilding petcocks can be problematic, as such, testing PRIOR to installation is mandatory.
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Old March 31st, 2022, 05:53 PM   #212
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Quote:
Originally Posted by ducatiman View Post
currently doing 250 ninj carb set & petcock refurbs.
(attached pic of completed, functional petcock, carbset to follow)

Petcock got 1 new mesh filter (upper), all new orings (was able to reuse diaphragm, with new, small oring installed o'course). It tested perfect as OFF seals, ON + RESERVE only flow when vacuum is actuated.
Nice work
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Old March 31st, 2022, 06:01 PM   #213
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ty @shspvr
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Old April 1st, 2022, 10:45 AM   #214
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MOTM - Nov '18, Mar '17
pic as promised, carbset now refurbed.
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Old April 1st, 2022, 04:05 PM   #215
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MOTM - Nov '18, Mar '17
today converted a standard 250 vac petcock to constant flow per client request.
Made a gasket, thus eliminating the diaphragms/gaskets and spacer, which leaked under testing. Also provided a missing oring at the lever.

ON-OFF-RESERVE still function as intended under constant flow condition. All good, no leaks.
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Old April 3rd, 2022, 09:22 AM   #216
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MOTM - Nov '18, Mar '17
another set of Ducati / Mikuni BSDT38's in process. Fuel rail seals show a ton of white varnish, 1 pilot jet needed 'help' in removal. Thankfully, spares stocked for these exact circumstances. In addition, throttle slides frozen solid.
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File Type: jpg bui1.jpg (116.3 KB, 4 views)
File Type: jpg bui2.jpg (118.1 KB, 5 views)
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Old April 3rd, 2022, 04:22 PM   #217
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MOTM - Nov '18, Mar '17
finished them today....from this.....
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Old April 3rd, 2022, 04:25 PM   #218
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MOTM - Nov '18, Mar '17
to this

onward to 250's now in house
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File Type: jpg bui13.jpg (121.2 KB, 3 views)
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Old April 4th, 2022, 05:20 PM   #219
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MOTM - Nov '18, Mar '17
250's in house today. Finished, but not without some drama. Replaced aftermarket, non-marked main and pilot jets with factory stock sized jets. Ugh. Had no choice but to repair via enlargement/drilling/tapping a stripped female thread at the LH carb float bowl, upped from 4 to 5mm (see pic). Other changes were made where necessary to net a set of now perfectly set up, usable carbs.
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File Type: jpg dyl2.jpg (103.7 KB, 8 views)
File Type: jpg dyl5.jpg (105.4 KB, 4 views)
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Old April 8th, 2022, 07:43 AM   #220
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MOTM - Nov '18, Mar '17
another 250 set finished this morning. Coincidentally, the same exact drilling/tapping sequence in the same exact spot was required! Overtightening screws (compensating for flattened bowl gaskets) is a no-no. Replace the darn bowl gaskets! In this case, I ran out of my standard, I subbed Lite-Tek spares. Also replaced a torn diaphragm.
All consumables replaced, adjusted, synched, wet tested. I'll submit these as now fully functional, a far cry from what I was initially sent.
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File Type: jpg jam7.jpg (130.8 KB, 4 views)
File Type: jpg jam8.jpg (115.6 KB, 7 views)
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Old April 30th, 2022, 12:21 PM   #221
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MOTM - Nov '18, Mar '17
refurbed, shipped back to owner yesterday.
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File Type: jpg cor3.jpg (96.9 KB, 6 views)
File Type: jpg cor4.jpg (89.1 KB, 6 views)
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Old May 17th, 2022, 04:41 PM   #222
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MOTM - Nov '18, Mar '17
busy day, 100 mile morning ride followed by completion of a 250 refurb upon return. They came out nice.
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File Type: jpg merle10.jpg (106.3 KB, 5 views)
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