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Old May 4th, 2022, 12:14 PM   #1
Bob KellyIII
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My Continuing battle with pilot jets on the Triumph

When I put the triumph to bed for the winter I was sure to run the gas real low on the float bowls... by turning off the fuel and letting it run, and it was running fantastically..... a few months later mid winter or so I fired it up and it ran like crap. so I cleaned the pilot jets and like magic, it fired up first kick and ran like a champ....
so yesterday I took the cover off her and wiped her down real good and fired her up... started first kick and then started running badly Pilot jets I thought!
so I shut off the gas and let it run till the stagering point and then killed it.
today I just pulled the pilot jets and ran the cleaning tool through them both and put them back in and gave her a kick and it was running great ...without the choke ! ( it's 73 deg here today)
it continued to run fantastically even down to 1000 RPM
so I turned off the gas again and let her run a bit till she started to stagger and I killed it.... I was thinking of taking her for a ride but I only had 2 hrs of sleep last night so maybe that's not such a good idea ! LOL
.... I have a good paper fuel filter before each carb inlet one on each petcock
and I am wondering why the pilot jets get plugged so easily ???
there should be absolutely no debris getting to the carbs !
could Old fuel do that ? I put it in before I parked it for the winter
and it seems to run fine on that fuel, so does the RX4 ( same batch of fuel)
.... I'd say if it runs on it, it's not the fuel .... but that may not be the case
I dunno !
Grin...that bike makes me smile when I hear it run good ! what'a beast !
....
Bob.......
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Old June 3rd, 2022, 05:10 PM   #2
Bob KellyIII
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I took the Triumph 750 up to the truck stop and filled the gas tank and I ran out of gas about 200' before I got to the pump ! so the tank was completely empty
....
I also blew the fuze when it died, very strange occurrence of anomalies , just to go get gas !
but I managed to get gas put tinfoil over the super tiny fuze, don't know why that was in there ! and it fired up and took me home....
the funny thing is it hasn't plugged the jets sense ! it usually fires up on first kick
and runs like a top now perhaps it was a load of bad fuel from the get go I don't know
....kind of a strange reaction to fuel.... having to clean the pilot jets very often ! but perhaps the fuel itself had a bunch of partials in it !?!?!?!
but so far this gas has been working great ! weird !
....
Bob...
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Old June 3rd, 2022, 10:26 PM   #3
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Old June 4th, 2022, 03:08 AM   #4
Bob KellyIII
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Nah ! not this time ...I put in an electronic ignition system and I haven't had a bit of problem with spark sense ! .... that reminds me to check the timing with a timing light... as I know it is right on with static timing... but a timing light is better ! ... the fuze.... that was most likely me... it IS INDEED the only fuze on the property that will fit it ! (gott'a buy some 30 amp'ers !)

have you ever ran into that sort of fuel problem before ? it's a new one on me !
sure I've seen where year old gas won't run an engine... but never seen fuel that was chunky before !
I remember taking about a year and a half to rebuild my Mom's white VW bug
(mainly due to the lack of parts and money to do it...)
finally got it running but it ran like SH#$ and i tried everything but the miss-fire was hopping all over the place and didn't want to take throttle either
so we brought home another 5 gal can of gas and dumped it in there and all of a sudden the car started easy and ran like a top ! ....that was back when they first changed the fuel formula for California.... they have been messing with it every sense.... you have no idea what you'll get at the gas pump anymore !
.... that gas that was in the triumph had sta-bul in it and so did my RX4 at that time but I have filled them up sense then...
the Ninja and my Kids bike still have the Sta-bul fuel in their tanks.... ain't ran them much ! LOL
.....
i think i just got a bad load of fuel because soon as it was gone and new fuel put in there I haven't had to clean the pilot jets sense....
which means I should get some injector cleaner for the CRV and probably the RX4 as well.... Sigh ! what the heck, it's only money ! HAHAHAH
....
later !
Bob...
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Old July 4th, 2022, 04:42 AM   #5
Bob KellyIII
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I fired up all the bikes yesterday and you guessed it the Triumph ran like doo doo...the pilot jets need to be cleaned AGAIN ! it probably only set for a month straight...and it did get in the 90's a few days ago but honnestly that bike must hate me ! !!!!!
it ran fine above 2000 rpm but trying to get it to idle was a no-go thing again
I suppose I should sell it as I do not ride it anywhere near enough !
even the Ninja fired right up as it always does and warmed up fairly fast with the 85 deg. day.... ( it likes the warm !)
....
there must be something with the new fuel like it thickens up if it sets....
i don't know , but at least with the new carbs their easier to clean than the old carbs ! LOL.....

Bob.........
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Old July 4th, 2022, 11:00 AM   #6
ducatiman
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"the pilot jets need to be cleaned AGAIN"

I'd go so far as to add the phrase "and full fuel circuits" to your comment above.

Something additional is wrong as this has become a repetitive situation.

My carbed 900SS Ducati starts/runs/accelerates perfectly after a recent 6 week "vacation", recently documented and linked right here on ninjette.com.

https://www.ninjette.org/forums/showthread.php?t=377234
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Old July 4th, 2022, 03:46 PM   #7
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I assume you have in-line filtre? So we can rule out carb-inlets as source of crud.

Which leaves carb-outlets as cause of issues. How large is vent for atmospheric pressure? It only needs to be only so large to pressurise float-bowls. If you've got giant 10mm vent, maybe constrict it down to 2-3mm?

This will prevent rapid petrol evaporation inside carbs themselves to prevent deposits and clogs.

Are you using PEA-based fuel-system cleaner in tank? Helps prevents petrol degradation and clog build-up. Darn, I'm starting to sound like one of those hair-product ad-verts!!
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Old July 4th, 2022, 04:32 PM   #8
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strongly recommend this, especially in bikes that will sit for some periods.....yes its Polyetherine based
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File Type: jpg stabil 360 marine.jpg (51.7 KB, 0 views)
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Old July 4th, 2022, 08:13 PM   #9
Bob KellyIII
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Quote:
Originally Posted by ducatiman View Post
"the pilot jets need to be cleaned AGAIN"

I'd go so far as to add the phrase "and full fuel circuits" to your comment above.

Something additional is wrong as this has become a repetitive situation.

My carbed 900SS Ducati starts/runs/accelerates perfectly after a recent 6 week "vacation", recently documented and linked right here on ninjette.com.

https://www.ninjette.org/forums/showthread.php?t=377234
Yah I know..... it shouldn't be doing this at all... I do have in line paper type fuel filters on all the lines that feed the 2 carbs ( 4 lines, 4 filters)
the gas lines when I cut them and took out about a 1" piece to add the filters look great inside... no cracking or even dirt on them they look brand new so I didn't change them ( if memory serves me correctly,... I think I was going to but didn't) .... last run to the gas station found me pushing it the last 200 yards to the pump where I put in premium and then had to replace the fuse to get it started again.... and then I rode it home...
I started it about 3 or 4 times sense then and every time it started and ran great and even idled correctly..... but not this time... and it probably sat for about 30 days sense the last time I started it... ( probably 3 months sense the fill up )
....
even if there was rust in the tank it wouldn't be able to get past the fuel filters.....
these carbs have a bleeding plunger to prime the carbs prior to starting
I am wondering if because they are "OPEN TO THE AIR" in that regard, weather the alcohol in the gas is "absorbing" so much water from the atmosphere that it plugs up the pilot jets....( it has rained several times sense it was parked...)
but I seriously doubt if water would stop a pilot jet from working.... would it ?.... it might,.... it's a very tiny hole !
if it were easy to pull the air cleaners on this beast I would start it and slap my hand over the carb throat and suck out all the junk... but the air cleaners take an hour or 2 to get on there right !
....
about the last 6 times it has done this I just pull the pilot jets and clean them and it works great for a few days.... only when it sits is there a problem.
...
BUT WHY ? that's the question...
....
Bob.....
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Old July 4th, 2022, 08:21 PM   #10
Bob KellyIII
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Danno:
I didn't put any fuel stabilizer in the tank after my last fill up because I figured I'ed be riding it .... well that didn't pan out and it sat....
.....
I think I'll go out there and do that now...
I dunno if it's PEA based ..... what is that?
I use sta-bul.
......


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Old July 4th, 2022, 08:59 PM   #11
Bob KellyIII
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I put a bit of Sta-bul fuel stablizer in the gastank and sloshed it around a bit the best I could.... then cleaned both pilot jets blead the carbs and kicked it 1 time then turned on the choke , kicked it again and it fired right up.... ran like a champ.... and idled great she really sounds good when she's running right!
....
but Why do I have to do that every time I want to ride it ? that is unreal it's gott'a be the fuel because back in my youth nobody I ever talked to had this problem.... getting them started was the big issue back then ... not idling !
(and that was usually the points! )
the only thing I can think of is todays fuel ...but that really doesn't make too much sense but given at how small the pilot jets are (takes the smallest wire I have in the carb wire cleaning probe kit...) it could be moisture plugging them up... if it were ran every day I'm sure there would be no problem.... but I don't know that for a fact.
.....
Just the mark of the beast I guess.... she wants to be ran more often than she's getting HA !
.....
any ideas ?

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Old July 5th, 2022, 06:18 AM   #12
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4 or 5 different variations of Stabil exist...which are you using? Needs to be ridden to actually mix up (and into carb set)
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Old July 5th, 2022, 08:28 PM   #13
Bob KellyIII
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I've got sta-bul 360 performance...
....
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