 NEEDLES & JETS
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Joined: Feb 2008
Posts: 44
Greenhorn
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OP
Greenhorn
Joined: Feb 2008
Posts: 44 |
Just put EPCO pipes on an 04 Speedmaster. Started it up & it definitely needs the carbs done. I kept the UNI off and left the Snorkel in just to hear it run. Was told to start at 130/42 & consider TBS needles. Are they the same as Thruxton needles? Also considering drilling the air box, how much will that change my set up. Also, is there such a thing as a 40 pilot?
Greg
04 BumbleBee SM
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Re: NEEDLES & JETS
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Joined: Feb 2007
Posts: 23,225 Likes: 62
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,225 Likes: 62 |
No Thuxton and TBS needles are different I didn't find it but there was a pic of the 3 next to each other posted once.
Yes a 40 pilot is possible but you would be going the wrong direction for your set up. Probably stay with the 42 unless you decide to remove or cut your air box.Just adjust the mixture screws. If you open up the intake some then might go to 45.130 main sounds close depending on your elevation for your set up. there again might have to go larger if you open up your intake more.
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: NEEDLES & JETS
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Joined: Feb 2008
Posts: 44
Greenhorn
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OP
Greenhorn
Joined: Feb 2008
Posts: 44 |
I ordered 42's but was told I probably have stock 40's in now
Greg
04 BumbleBee SM
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Re: NEEDLES & JETS
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Joined: Feb 2007
Posts: 23,225 Likes: 62
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,225 Likes: 62 |
your 04 should have 42s in it stock.
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: NEEDLES & JETS
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Joined: Feb 2008
Posts: 44
Greenhorn
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OP
Greenhorn
Joined: Feb 2008
Posts: 44 |
My obsession gets the best of me sometimes. What I saw after webing around is the Truxton needles seem to be closer to the same length. Jenk's claims they help with midrange performance.
So, Where can I find Thruxton needles that don't cost me as much to ship them as they cost?
Last edited by Hittman; 02/24/2008 3:32 AM.
Greg
04 BumbleBee SM
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Re: NEEDLES & JETS
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Joined: Jan 2005
Posts: 3,753
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 3,753 |
dont use thruxton, go with tbs, or 2 shims on the stockers
Frank
(Former)05 BA tbike pipes, ai removed, Freak, mikuni hsr 42's, 904, ported/polished head, 1mm oversized valves
NOW-2010 silver and black tbird
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Re: NEEDLES & JETS
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Joined: Apr 2007
Posts: 286
Adjunct
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Adjunct
Joined: Apr 2007
Posts: 286 |
I'd start with the TBS needles and see how she runs. Then if it still feels a little lean in the midrange you could switch to the Thruxton needles and see how they work out. Its relatively easy to switch out the needles, and there is a fair amount of overlap between the main jet choice and the needles you run. So sometimes a 125 main and thrux needles works out to be not much different from a 130 main and shimmed stock needles. I tried a bunch of combinations while running short TORS and a drilled airbox and may end up experimenting more if I ever get around to doing the freak kit. Good luck and let us know how you make out.
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Re: NEEDLES & JETS
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Joined: Feb 2008
Posts: 44
Greenhorn
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OP
Greenhorn
Joined: Feb 2008
Posts: 44 |
Decided to start with shimmed stock needles, then move to TBS if warranted. Decided it's a work in progress want to see how the stock needles feel first. Doing the Job this weekend, Weather is supposed to be nice.
Thanks
Greg
04 BumbleBee SM
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Re: NEEDLES & JETS
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Joined: Feb 2007
Posts: 23,225 Likes: 62
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,225 Likes: 62 |
Best way to proceed is to make 1 change at a time and see how it runs and where to go next. If you do multiple changes at a time you won't know what was good and what was bad.
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: NEEDLES & JETS
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Joined: Jan 2005
Posts: 2,968 Likes: 1
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 2,968 Likes: 1 |
If you go with the TBS needles you'll have to drill your airbox and remove the snorkle. I have an 04 and I ran the TBS for a while. I found the best setup to be 132 mains, 45 pilots, drilled airbox with UNI filter and snorkle removed. I moved back to stock needles with 1 shim and the bike seems to be a little happier at the high end. I did lose a little mid range response but not enough to make me want to switch back.
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Re: NEEDLES & JETS
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Joined: Sep 2006
Posts: 1,457
Learned Hand
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Learned Hand
Joined: Sep 2006
Posts: 1,457 |
Quote:
What I saw after webing around is the Thruxton needles seem to be closer to the same length.
Its not the length, its the diameter. Thinner needle allows more fuel. I don't know why they are different lengths.
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Re: NEEDLES & JETS
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Joined: Feb 2008
Posts: 44
Greenhorn
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OP
Greenhorn
Joined: Feb 2008
Posts: 44 |
Went with 130/42/Stock Needles with 2 Shims/2.5 turns on Mixture Screws. Raining & Cold did not take her out. I Did find a Brass Spacer/Insert on the floor was flat on one end the length was approx 1/4" & inner diameter about 3/8". Thought it probably went between the Fender & Air box. Any Ideas? Tried to post a Pic, but couldn't figure out how. Thanks everyone for your help. Saved some cash, doin it myself.
Lonzo Love the EPCO's.
Last edited by Hittman; 03/03/2008 1:45 AM.
Greg
04 BumbleBee SM
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Re: NEEDLES & JETS
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Joined: Jan 2005
Posts: 211 Likes: 2
Adjunct
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Adjunct
Joined: Jan 2005
Posts: 211 Likes: 2 |
I have the airbox out so I might as well look at the carbs.
I have a 2002 BA, AI removed, snorkles removed,dam cut down,stock mufflers with 2 baffes removed, elevation 1,000'
Will this have to be rejetted. What are your suggestions?
Why do you replace the needle with TBS? Do you recomment this I do this?
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Re: NEEDLES & JETS
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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:
I Did find a Brass Spacer/Insert on the floor was flat on one end the length was approx 1/4" & inner diameter about 3/8".
Lonzo Love the EPCO's.
Did you remove the entire jet assembly or just the jet? Because that sounds a lot like the collar that fits above the jet...
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: NEEDLES & JETS
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Joined: Sep 2006
Posts: 1,457
Learned Hand
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Learned Hand
Joined: Sep 2006
Posts: 1,457 |
Quote:
In that picture, looks like aluminum or something. When mine fell out, it was definitely brass.
Hittman, if that's the part you are talking about, it absolutely will not run right without it.
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Re: NEEDLES & JETS
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Joined: Jan 2005
Posts: 11,126 Likes: 13
Should be Riding
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Should be Riding
Joined: Jan 2005
Posts: 11,126 Likes: 13 |
Quote:
Went with 130/42/Stock Needles with 2 Shims/2.5 turns on Mixture Screws. Raining & Cold did not take her out. I Did find a Brass Spacer/Insert on the floor was flat on one end the length was approx 1/4" & inner diameter about 3/8". Thought it probably went between the Fender & Air box. Any Ideas? Tried to post a Pic, but couldn't figure out how. Thanks everyone for your help. Saved some cash, doin it myself.
Lonzo Love the EPCO's.
Wow. Old thread resurrection.
while perusing the archives for needle info, I realized that your "...Brass Spacer/Insert on the floor..." does indeed go between the fender and air box. 
Item 24 in this pdf
FLANGED SLEEVE, M6
Last edited by moe; 01/19/2010 4:04 PM.
Blowing gravel off rural roads
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