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  Topic Review (Newest First)
2-15-2020 9:58 AM
ducatiman Owner report:

"Holy balls I just put these back on my bike....somewhere along it's life my 09 250 lost its R, and @ducatiman found it and gave it back. Its got a growl I haven't heard since its first couple of thousand miles, and after adjusting the pilots it's nimbler than ever."
2-13-2020 4:22 PM
ducatiman another set o 2 fiddies, will be fine runners
1-24-2020 7:02 PM
ducatiman We chose to review the 250 owners petcock along with doing the carbs. As problematic on the 250 as the 500.

Some ultrasonic, further cleaning, a new diaphragm main seal oring, looks like new and testing fine.
1-23-2020 6:30 PM
ducatiman Too fiddies in the house now...the 1st set of '20. Off we go!

And finished today.
12-27-2019 11:15 PM
ducatiman likely the last of '19...another set of 250's just about done. Nice inside and out (note brass)

Neglected to mention, based on owners' "always running rich" comment, I found hogged out pilot jets.... .002" over to be precise, from a stock 38 to a hogged equivalent of 42....2 sizes up. Salvage pilots from my stock now installed.

Otherwise I've reached a consistent standard threshold these days, I think.
12-22-2019 9:27 PM
ducatiman a set of too, too fiddies knocked off today, goin' back home. These things came out nice.
12-12-2019 9:08 AM
ducatiman a set of too fiddies done (were gooey, evidence of intense leak) and returned to owner, another set of fi' hunners appears. So far a consistent December. Not complaining, mind you, but surprised. An early taste of a busy '20 season perhaps?
12-5-2019 11:32 PM
K-woppa
Quote:
Originally Posted by ducatiman View Post
I'll PM in a few

looking again, these are ancient vintage, pre CV. Look familiar to anyone?

Edit- I believe they are from snowmobile application....unknown vintage, brand and model.
I ain't never seen none like that before. No slides at all that I can see, just one butterfly.

EDIT: Quick research shows it's a Mikuni B series; snowmobiles, yes, and pwc.
12-5-2019 9:01 PM
ducatiman I'll PM in a few

looking again, these are ancient vintage, pre CV. Look familiar to anyone?

Edit- I believe they are from snowmobile application....unknown vintage, brand and model.
12-5-2019 8:49 PM
Bulldog 50 Forgot to say homeowner gave it to me . He thought it was cool and didnt know it was there . I told him about u helping me out and he said he'd like to see if maybe someone could get some use out of it .
12-5-2019 8:47 PM
Bulldog 50
Quote:
Originally Posted by ducatiman View Post
for what bike? look like 70's vintage early Mik CV?
Honestly have no idea putting a new electrical service on a house and this was layin on a shelf . It was covered with about 20 years of dust lol . Blew it off enough for the pics . Free to u I'll eat the shipping to put it in good hands . Mabe it will help somebody and I can use the karma lol
12-5-2019 6:37 PM
ducatiman for what bike? look like 70's vintage early Mik CV?
12-5-2019 6:28 PM
Bulldog 50 Basement find thought of u . You interested?
11-25-2019 10:37 PM
[email protected] Yeah, and I'm betting yours work better....
11-25-2019 9:15 PM
K-woppa You're probably better off that way.
11-25-2019 9:28 AM
ducatiman Fat chance, those beautiful works of art start at $4K and run through mid $5K, specially built and marketed, limited to the extremely rich collector. Few and far between. Packard carb models for antique Cadillac into $8K! Wow, thats JUST the carb set!

Those in another galaxy....I'm quite satisfied renewing our affordable, common little Mikuni and Keihin!
11-24-2019 10:18 PM
K-woppa Well, there's your foot in the door of the vintage auto world. Next thing you know you'll be redoing these.
11-24-2019 6:19 PM
ducatiman Carter now done, going home Monday A couple bee 4 and afters

details:
*new gaskets
*newer design, updated plastic float replacing holed original brass unit
*new needle/seat
*new accelerator pump
*all drillings/circuits/ball check valves cleared and functional
*all linkages now free and operational
* medium strength (blue) loctite used on segment screws
*noted and retained all original settings (as vehicle ran prior, though long ago)

thats all, folks
11-17-2019 10:40 PM
ducatiman I'm no expert by any means, but FWIW the model of the IH truck is KB2 and the Carter carb is model BBR-1.
11-17-2019 2:06 PM
[email protected] Yeah, I noticed the '49 in the pic was a flathead so sometime between '49 and '56 they switched because mine was a Black Diamond 240 cube OHV. The oil bath air cleaner, the huge horn, and the bracing rods are familiar, though, also the ID plate on the firewall. I still have the ID plate from mine kicking around in a desk drawer somewhere. The rest of it is long gone.

The weird thing is that I haven't even thought of that old monster (we called it the Stegosaurus because it was dark green with a high humped back) for decades, then ducatiman posts his pics and the very next day I spot a nicely restored mid-50's IHC pickup in the local grocery store parking lot. Go figure. I hung around for a bit hoping I could catch the owner and get a closer look, but no luck. Then later the same day I spotted it parked in the back forty of a ranch about 15 miles out of town. Now that I know where it lives I'll catch up to the guy sooner or later and take a little trip down memory lane.
11-17-2019 10:11 AM
K-woppa
Quote:
Originally Posted by [email protected] View Post
Hard to believe that over 3 liters of straight six engine could manage to breath through such a tiny venturi. Takes me back to the '56 IHC Travel-all that I owned back in the seventies. Mine was an ex-logging company 4X4 crummy, had a 4-speed with hi-lo transfer case and super low axle ratios (top speed about 55). It got the worst gas mileage of any vehicle I have ever owned, about 8 miles per gallon. After discovering just how bad the mileage was, I quit using it for transportation and only used it when I needed to haul lumber, pull stumps, or plow snow. Looks like a fun project..
I think the '40s flathead engine was actually a little over 200 cubes. The later overhead valve engines were bigger. They were all undersquare, low rpm stump pullers.

My father's '59 pickup would top 70. I know because that's how fast it was going when it started to shimmy so badly my father couldn't keep it on the highway (and he was a professional truck driver). Heck, we could hardly SEE the highway. We ended up sailing along the median strip. Thankfully, when it hit the median strip it stopped shimmying, otherwise we would have been dead. I never looked at that truck the same way afterwards.
11-16-2019 6:19 PM
ducatiman some after pics

Comments.....
Anti tamper caps still present, had to drill them out to get to the pilot screws to remove/fully clean the circuit. In doing so, discovered the factory screw settings to be near *closed* on both carbs! Sure enough, the needle tips were projecting way into the venturi! How did this thing ever run? What were the factory boys thinking?
In addition, super tight pilot jets both 100% clogged upon removal/inspection.
Float valves were "dead"...springs fatigued, low float level= high fuel level. All corrected with new float valves and adjustment, confirmed during wet testing.
Otherwise standard procedure, all brass shining like new, all openings back to their intended factory specs. All new orings, stainless hardware, the rail filter installed.

Look at the slides shining! (with perfect action) I predict these'll be some fine runners now.
11-16-2019 2:22 PM
ducatiman Turning my attention to yet another set of 5 hunnerts in the house today. Nothing unusual...except pilot jets really frozen in place...a wrestling match to dislodge them revealed....100% clogged. Not unexpected...otherwise, routine stuff, the usual evidence of corrosion, sitting some time. With a surprise or 2.

Before pics.....
11-16-2019 2:09 PM
ducatiman 1949 International pickup owner in the Carolinas somewhere, the Carter carb goes on this thing. Sitting for some time, designed in a long, bygone era....I'd be surprised if it topped out at more than 55.
11-16-2019 12:54 PM
[email protected] Hard to believe that over 3 liters of straight six engine could manage to breath through such a tiny venturi. Takes me back to the '56 IHC Travel-all that I owned back in the seventies. Mine was an ex-logging company 4X4 crummy, had a 4-speed with hi-lo transfer case and super low axle ratios (top speed about 55). It got the worst gas mileage of any vehicle I have ever owned, about 8 miles per gallon. After discovering just how bad the mileage was, I quit using it for transportation and only used it when I needed to haul lumber, pull stumps, or plow snow. Looks like a fun project..
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