 Re: Got a problem with my bike - help please
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Joined: Jun 2007
Posts: 3,210
Loquacious
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OP
Loquacious
Joined: Jun 2007
Posts: 3,210 |
I havent been driving 5th gear up and down any hills around here so i couldnt say for sure. But this problem is basically felt on every gear in the upper rpm's, i just dont feel it as much because im usually shifting at that point, and when im in 5th i feel it plenty at around 75 trying to pass a car and i just cant get around them because she's choking out and sputtering. I got pilots being sent to me from nightrider and dog_33 from this site, and when i get them in I'll be able to experiment a bit more and finally get this problem sorted out.
Big thanks to both those guys
Tom
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Re: Got a problem with my bike - help please
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Joined: Dec 2006
Posts: 220
Adjunct
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Adjunct
Joined: Dec 2006
Posts: 220 |
Any chance it is the Rev Limiter? Although it should let you get past 75 mph. I got into a dual with another bike the other day and hit the rev limiter in three gears.
Without a tach you may not realize that it is getting up there. And it does get up there pretty quickly.
Gerry
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Re: Got a problem with my bike - help please
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Joined: Jun 2007
Posts: 3,210
Loquacious
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OP
Loquacious
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Posts: 3,210 |
Well i guess i cant say for sure if its the rev limiter or not because i dont have a tach. But i can say that the sputtering is more of a violent jerking and decrease in power compared to a rev limiter firing in.
How did that duel go, garibald?..haha
About the carb gas leak... I opened up the carb last night to see if i could stop this gas leaking out of the air filter....I made sure the floats were free and the needles were sitting properly...put it back together and its working fine now. thank god...now i can just focus on my carb jetting situation and i'll be golden
So
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Re: Got a problem with my bike - help please
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Joined: Jan 2005
Posts: 1,182 Likes: 2
Learned Hand
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Learned Hand
Joined: Jan 2005
Posts: 1,182 Likes: 2 |
may have just had some debris under the float needle.
Pete
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Re: Got a problem with my bike - help please
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Joined: May 2007
Posts: 6,432 Likes: 1
Worn Saddle
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Worn Saddle
Joined: May 2007
Posts: 6,432 Likes: 1 |
Quote:
may have just had some debris under the float needle.
It'll be interesting to see if that was contributing to the original problem.
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)
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Re: Got a problem with my bike - help please
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Joined: Jun 2007
Posts: 3,210
Loquacious
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OP
Loquacious
Joined: Jun 2007
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Well i changed the plugs and took the horseshoe pieces off friday and went riding all day saturday...and theres a huge difference...it was just running totally better. I was hitting around 85 before i got a little sputtering which is fine by me.
So i ended up putting on 100 miles saturday, checked the plugs, and there were pretty much brown. I still think i need to change the jetting a bit because my pilots are huge compared to my mains, but all in all im totally happy with the way all this worked out. Theres definately a sense of accomplishment when youre working on your bike for a bit, and you take it out and see a pretty big improvement.
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Re: Got a problem with my bike - help please
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Joined: Jun 2007
Posts: 3,210
Loquacious
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OP
Loquacious
Joined: Jun 2007
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Got the 42 pilots in there now, of course its running a bit lean now. I got popping on decel.
So what should i change first?
42 pilots to 45's?
or start with the mains first
137.5 to 140?
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Re: Got a problem with my bike - help please
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Joined: Jan 2005
Posts: 1,182 Likes: 2
Learned Hand
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Learned Hand
Joined: Jan 2005
Posts: 1,182 Likes: 2 |
how much popping ?
do you like it or not?
how many turns on the screws?
you could try another half turn, but I would
not go past 3.5 turns out.
I would go to 140 on the mains.
going to 140 may help the stumble on top.
if it still pops to much for you then you can go to 45
pilots .
just remember to turn in the mix screws to 1.5 or 2 turns ,
and start from there.
Pete
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Re: Got a problem with my bike - help please
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Joined: Jan 2005
Posts: 6,308 Likes: 4
Worn Saddle
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Worn Saddle
Joined: Jan 2005
Posts: 6,308 Likes: 4 |
To see if the mains need up or down - go in 4th or 5th gear on a flat road, go WOT for about 10 seconds, let off the throttle a pubimeter...if it picks up speed or the stumble quits - up the jets a size you are lean. If it makes no difference, go down a size you are rich.
A word to the wise is not necessary. It is the stupid ones who need the advice.
Pat
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Re: Got a problem with my bike - help please
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Joined: Jun 2007
Posts: 3,210
Loquacious
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OP
Loquacious
Joined: Jun 2007
Posts: 3,210 |
The popping is pretty rapid as soon as i let off the gas while slowing down, so i'd like to quiet that out a bit.
Im not sure of my mixtures screws because i was only trying to change one thing at a time. The pilots were 55's, i brought them down to 42's, now im getting popping, so im ready for the next step.
Is it worth my time to just change the mixture screws, and then see what happens? Or is it pretty much obvious that im running lean with only 137.5 mains?
Dinqua:
I had it out WOT yesturday on some pretty flat roads and i cant say that i noticed any difference when i let up. My conflict is that everyones upping the size of the pilots, but you recommend not to.
So whats the solution:...bigger mains smallest pilots, or slightly bigger mains, slightly bigger pilots?
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Re: Got a problem with my bike - help please
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Joined: Jan 2005
Posts: 1,182 Likes: 2
Learned Hand
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Learned Hand
Joined: Jan 2005
Posts: 1,182 Likes: 2 |
like you said , just do one thing at a time.
the easist first.
check the mixture screws,you do not have to open the carbs
for them.
turn them in till they stop and back them out to 3 turns.
then go for a ride and check your popping.
oh , and count as you turn in so you know what you have to
start with.
Pete
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Re: Got a problem with my bike - help please
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Joined: Jun 2007
Posts: 3,210
Loquacious
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OP
Loquacious
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sounds like a plan, all i need is some sunshine over here in jersey.
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Re: Got a problem with my bike - help please
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Joined: Jan 2005
Posts: 8,639 Likes: 3
Old Hand
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Old Hand
Joined: Jan 2005
Posts: 8,639 Likes: 3 |
Quote:
Last night was the first dry day in a while so i figured i'd take it for a little ride to see what happens in the cooler weather...and it ran alot better at higher speeds and didnt really break up on me until around 85...what could that mean?
Since cooler air is more dense, I/m thinking your high speed mixture is probably too rich. If the needles have shims under them, remove them. If they have 2 or more, just remove 1 at a time and try it. If no shims, go a size or two smaller on the pilot jets.
Oh, wait! First, try leaning out the idle mixture a little. A lot of people don't like the exhaust to pop, even a little bit, so they make it stop by over richening the idle mixture. The idle and transition jets seem to come back online in these carbs under high speed high load conditions. When I readjusted my mixture from no-pop to best idle speed, I gained over 10 MPH at the top end.
Let's hope there's intelligent life somewhere in space 'cause it's buggar all down here. -- Monte Python
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Re: Got a problem with my bike - help please
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Joined: May 2007
Posts: 6,432 Likes: 1
Worn Saddle
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Worn Saddle
Joined: May 2007
Posts: 6,432 Likes: 1 |
Quote:
Oh, wait! First, try leaning out the idle mixture a little. A lot of people don't like the exhaust to pop, even a little bit, so they make it stop by over richening the idle mixture.
My thoughts exactly, tweak the idle mix first. 
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)
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Re: Got a problem with my bike - help please
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Joined: Jun 2007
Posts: 3,210
Loquacious
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OP
Loquacious
Joined: Jun 2007
Posts: 3,210 |
Quote:
Quote:
Last night was the first dry day in a while so i figured i'd take it for a little ride to see what happens in the cooler weather...and it ran alot better at higher speeds and didnt really break up on me until around 85...what could that mean?
Since cooler air is more dense, I/m thinking your high speed mixture is probably too rich. If the needles have shims under them, remove them. If they have 2 or more, just remove 1 at a time and try it. If no shims, go a size or two smaller on the pilot jets.
Oh, wait! First, try leaning out the idle mixture a little. A lot of people don't like the exhaust to pop, even a little bit, so they make it stop by over richening the idle mixture. The idle and transition jets seem to come back online in these carbs under high speed high load conditions. When I readjusted my mixture from no-pop to best idle speed, I gained over 10 MPH at the top end.
Yeah that was back before i found out i had my pilots at 55's & 127.5 mains, the larger pilots were compensating for the leaner mains.
So right now i changed the pilots to 42's, with no shims...which has me running a bit lean with a small amount of popping. i just checked the mixture screws and they were set at 2.5 turns, so i opened them out to 3 turns and its not popping so much right now, but i can feel it running a little lean off the start and at lower speeds. Even when i let off the throttle, its jerking forward, so im assuming the pilots arent letting enough gas in, and the mains are giving most of the gas. Im gonna try putting 45 pilots in and see what happens...and then work on changing the mains after.
Greybeard have you ever dynoed your bike after you got it running decently? Just wondering if you were running a bit lean in the lower rpms due to the air mixture settings?
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Re: Got a problem with my bike - help please
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Joined: Jan 2005
Posts: 8,639 Likes: 3
Old Hand
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Old Hand
Joined: Jan 2005
Posts: 8,639 Likes: 3 |
The nearest dyno, as far as I can find out, is some 300 - 400 miles from here so I haven't had it on one. There is a big phone company junction box about 1/8 mile down the paved road that intersects my road at the end of my horse pasture. I have been using that for a marker to run some acceleration tests. The triumph is going about 8 mph faster (allowing for error) than the 88 inch Lowrider the OL had, (probably had something to do with her trading it in on a new Roadking). It was about equal to my 96 inch Night Train until I upgraded it.
I haven't been able to detect any variation in the power delivery that might be caused by low end leanness. Other bikes with similar mods have been run on a dyno and mine feels like it is following pretty much the same torque curve. Flat as a pancake just like stock to around 3400 - 3600, then the slides open and the torque starts angling upward. The effect is about like the turbo coming on in a Cummins Dodge, it goes real good, then starts going even better.
Let's hope there's intelligent life somewhere in space 'cause it's buggar all down here. -- Monte Python
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Re: Got a problem with my bike - help please
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Joined: Jun 2007
Posts: 3,210
Loquacious
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OP
Loquacious
Joined: Jun 2007
Posts: 3,210 |
BACK FROM THE DEAD!!!
Problem turned out to be the hidden gas filter and the incorrect jetting by the previous owner didnt help either.
Thanks to Ian (the dog33) for letting me trailer my bike over to give it a looksy. Also for hooking me up with pilot and main jets as well.
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Re: Got a problem with my bike - help please
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Joined: Feb 2007
Posts: 23,194 Likes: 56
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,194 Likes: 56 |
There were a few other things I straightened out as well done wrong by the former owner as well. Roll all that up into a ball and it added up to the way it was running and cutting out.
Glad to have been able to help.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: Got a problem with my bike - help please
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Joined: Jun 2007
Posts: 3,210
Loquacious
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OP
Loquacious
Joined: Jun 2007
Posts: 3,210 |
Its funny, Oldroadie was the first who suggested looking at that hidden gas filter back on the first page.
All that wasted bandwidth...ahah
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