my day

[ducatiman]

on 50cc '86 Honda Spree today....pulled/drained tank and cleaned petcock. I believe first time ever tank drained, mesh filter cleared. While there fresh fuel/Stabil 360 added. I've cleaned carb prior. Starting 1st kick without battery, i blindly left the key on....duh.

Sorry, no pics.

[JayVapes]

way to go!!!

[ducatiman]

Knocked these beauties off today, total split, full refurb, careful setup, the works. My property to be sold, look for a thread in marketplace.

The black powder coated brackets done by none other than our own member @jkv45. Great work, I'd encourage anyone needing powder coating to look him up at Apex Custom Coating 608-444-2202.

[ducatiman]

a before/after of EX500 carbs done today.

[ducatiman]

the usual refurb done to these 250's today. Discovered hogged out plot jets (replaced with brand new) and clogged transition ports. All corrected, needless to say.

[ducatiman]

more tew fitties completed today

[ducatiman]

yet another set of too fitties today

[ducatiman]

and another completed today

[ducatiman]

knocked these off for a member today. Received 10:30am.....completed by 4:30, including the petcock.

[ducatiman]

ditto again today. Encountered huge, though unmarked (for size) main jets. Comparing to a stock 105, metering was visually way too large. As the owner complained of fouling plugs and bikes resisting high RPM running, I do believe this was the problem. Reverted back to all OEM stock jetting, removing needle shims as well.

[ducatiman]

yet another done today, found 1 clogged pilot jet, drilled/removed EPA caps along with my normal service. I predict these'll run fine.

[ducatiman]

while awaiting delivery of 2nd needle jet on @Detrailers carbset, I knocked off a full service on these pregens today. Came out nice, should be fine runners.

[Detrailers]

Originally Posted by ducatiman

while awaiting delivery of 2nd needle jet on @Detrailers carbset, I knocked off a full service on these pregens today. Came out nice, should be fine runners.

Beautiful. 2nd jet will be going out today.

[ducatiman]

^ superb, anxiously awaiting to finalize your carbset

[ducatiman]

Todays victims...currently wrestling with an exceptionally bitchy 250 carbset. Why oh why must both bowl and top cover screws be overtightened to the point where a dremel is necessary to remove them? Surprise... the bowl gaskets (orings at one time) flatter than pancakes, no wonder screws were so overtightened...leak prevention.

Nice internals, eh? But "carbs are easy".....so says the internet..... meh, I'm well on my way to returning them to as new condition. Stay tuned.

[ducatiman]

after service

additional problems found (beyond the obvious extensive varnish):
- 1 clogged pilot jet
- needles were incorrectly installed (left and right were juxtaposed, now corrected)
- needle shims removed

[ducatiman]

a set of fi' hunnerts finalized today.

[Bob KellyIII]

There is absolutely no doubt now...Gorden is the GOD of carburetors !
i am in AWE !!!!
....
Bob.......

[ducatiman]

Admittedly, Bob, I've (long ago) reached "benchmarks" within my carb processes through the use of unwavering, standardized, effective methods.

Certain "as received" variations of condition can produce differing visual outcomes, however functionally....each set I do are quite capable of "as new" performance levels.

Even though it remains incumbent on owners to assure valve clearances are sufficient, correct petcock function, (new, fresh) fuel condition, ignition component's performance....sending carbs my way virtually eliminates them from the equation.

[Bob KellyIII]

Didn't you make up a bench test setup for the carbs as well ? that must have been quite a feat to do in and of itself ! what does that setup test anyway ?
I bet you can actually see the pilot jet working and then more as the throttle is opened.... that has got to be a cool setup .... what do you have to power it with a shop VAC ???
....
Bob....

[ducatiman]

Within my service I utilize a gravity fed wet test for checking/setting fuel levels on various design carb sets. Note board is upside down? Flip it, its setup for EX500 and Ducati/Mikuni. Done during the reassembly process....prior to slide assembly phase.

[ducatiman]

Holiday time o' the season I'm understandably slow, as in DEAD slow. Enjoying while I can, Jan 1 I anticipate it'll open up again.

[ducatiman]

done for a member here today, will be fine runners

[Snake]

Looks like you do Quality work.

[ducatiman]

Yes, I'd consider that a fair assessment. Thank you for compliment.

[ducatiman]

currently on a 250 set today....upon disassembly found both choke plungers frozen in place. Soaking in WD40, to follow with heated ultrasonic treatment.
Pics to follow as I progress.

Edit: choke plungers both removed, though I bent the end of 1. I'll handle a (no charge) replacement as I've got spares. Both currently in ultrasonic.

I'm done for today.

[thedrewski86]

Originally Posted by ducatiman

done for a member here today, will be fine runners

I think I recognize those...

[ducatiman]

Originally Posted by thedrewski86

I think I recognize those...

ya absolutely should! how'd we make out with 'em?

[thedrewski86]

Starts and runs great. I've made sure the intake boots are seated properly multiple times though, and I still get an inconsistent idle. I don't really care that much as it just fluctuates between 700 and 2000 rpm. It seems to average out to about 1500 though and doesn't die. I'm waiting to get a few more good rides in before I really start to care, honestly running is better than not.
I'll probably have another set for you to go through. My Dad told me he found a spare set I apparently gave him with the bike years ago. I didn't even remember doing that.

[ducatiman]

you may want to (individually) set each pilot screw for highest idle, best response. Do it after a ride, bike fully warmed up.

[ducatiman]

finished the current set this evening, chokes functioning perfectly, as is everything else on them, confirmed via testing. A couple o' pics.

[shspvr]

Hey ducatiman have seen this before?, this thing got eat up

[ducatiman]

yep, vent tube, I believe I should have 1 here.

[shspvr]

Originally Posted by ducatiman

yep, vent tube, I believe I should have 1 here.

Got new one coming and fuel one to Thanks for confirming

[ducatiman]

WAY too cold for carbs here right now, LOL. Done in my warm basement on a pro-quality machine...I'm currently researching and learning proper cleaning methods of fuel injectors using some spares from my Ducati SS800. Ultrasonic, reverse flush and other methods, followed by graduated flow testing, thus confirming results. Rebuild kits, (featuring inlet filter baskets and orings) ordered for 3 family owned Toyotas and the Ducati for further research and "live" testing come warm spring.

Interesting stuff, to say the least.

#comeonspringdammit

[Bob KellyIII]

#comeonspringdammit
I could not agree more !!!!
....
Bob......

[ducatiman]

knocked off the 1st set of EX500 carbs for '22. New season just beginning to pick up here.

[ducatiman]

taking full advantage of the carburetor "off season" educating myself in the finer points of cleaning/servicing fuel injectors. A new machine in my possession, I'm experimenting with its cleaning capabilities and features (reverse flow and ultrasonic capabilities).

My first working testbed using 4 Denso injectors removed from my Toyota Matrix 2.4 engine, which I thought was running great.....wow what a difference after an ultrasonic and reverse flow clean and new "kit" install (filter baskets, orings & seals). Smooth verywhere, steady idle, great throttle response. I'll be monitoring fuel consumption going forward.

Next up to be my Ducati SS800 (Weber-Marelli injectors) when warmer weather finally returns.

#comeonspringdammit

[ducatiman]

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.

[Bob KellyIII]

before and after of those would really be nice to see ! LOL
....
Bob....