Bonneville America Forums Forums Technical Forums Exhaust 122 mains and 45 pilots.....wth?

My sceptre exhaust arived today so I couldn't wait to tear open the box and pour over everything. It was all there which was a good thing, and I liked the look of it in person, up to now I had only seen pics online.

I grab the bag with the jets in it, and I see the 45 pilot, and I'm trying to see the stamped number on the top of the main, but there isn't one. On the side of the jet it has a little "K" with a 122 next to it.

I don't know if anyone else has had any problems with orders from newbonneville, but I sent them 2 emails asking what size jets come with the exhaust. I finally got a reply stating that they, and this is a direct quote, "believe they use 45 pilots and 130 mains. I may be off by a couple sizes, though".

Is the 122 on the side of the main, the size? If so, isn't this completely undersized for this exhaust? If so, why are they shipping it with the kit.

If I'm wrong about any of this please let me know. If the mains are 122 then I need to order some new jets.

I think the stock jets are 122.

DuckOwner,

Brent, knows his stuff it has to be a mistake I can see the 45's which are your mains, but 122 jets are way to small.

What MOD's if any have you done to the airbox drilled ?, Uni Filter ?, Freak, snorkle in or out ?. What kind of needles are you running and are they shimed ?

Need some more info.

I think you will be fine with 132's it is hard to find 129 or 131's. Pull the snorkle.

My Secptre's came with 122 main jets from Team Triumph and 45 pilots..I did not like the 45 pilots as they loaded up on starting making it hard to fire so I went back to the 42 pilots. I also got a slight bit of the header pipes turning gold as it was a bit lean and installed 130 mains and now it runs out real well.

Jebus......Poppy not to sound like a complete turd but your missing the point. Me thinks NewBonneville sent me the wrong main jets. They Don't have a size stamped on the top of the jet, but there is a 122 stamped into the side of the jet. If this is indeed the size then I might as well throw them out.

DuckOner,

Every jet I bought from Brent had the size stamped into the side you have 122's. way to small.

I can not speak for Brent, but he cares and will probley swap you a set of 132's.

I wonder how I should go about trying to get in touch with him.

Call him. He always has time to help........Angelis

Brent answered my email questions right away. Seems like a pretty good guy and I thought the customer service was great on my order.

Or e-mail. he always gets back to you
G

I e-mailed twice about the size. He returned my e-mail the day after they shipped. I'll give it a try though.

Brent said, "We actually don't include those jets so they're yours to keep. We don't even sell 122's. You're welcome to place an order for any size you need."

Yah, thanks alot. I placed the order for the 130's, but next time I'll shop somewhere else.

I think Brent just resells the Sceptres. They're made by Team Triumph in Janesville, Wisconsin. They have a website. I'd give them a call and see what they recommend. I've heard they are good people.

Cody

Say what? You're crabbing at Brent because he won't give you jets for free? He just distributes Scepters and as Larry pointed out above, they come with the 122s.

As Cody said, contact Team Triumph. Maybe they will give you free jets.

Duckowner: Install the 45 pilots and run the 122 mains (your stock ones) with a shim that will compensate them up to 130ish. It may be fine depending on your riding style. You may run out of gas at wide open throttle but try it for now. The pilots run all the time so you may not be too lean with that setup and probably will not pop on decel.

As far is Brent goes. He could send you a clutch when you ordered a clock and these guys will tell you he is right and your really needed the clutch and should buy a watch.

Satron- I know you what you are saying, but I have to back Brent on this one. The jets come with the kit. Team Triumph of WI builds and supplies Brent with the Sceptres. It's Team Triumph that provides the jets with the pipes, and they will tell you the 122s are correct for a stock bike. They know our bikes, and did their own testing and concluded that 122s provided the most power. That being said, with all the different bikes, mods, and elevations a vendor can't be expected to provide you with the correct jets for your bike, set up, and elevation. Most exhaust builders don't provide you with any jets at all! I ran the 122s and the 45s that came with my Sceptres for quite a while and it worked for me. I have since opened up the intake some and rejetted, but the 122/45 combo worked just fine with an otherwise stock set up. My engine certainly never starved at WOT.

By the way the stock jets are 120s.

The only beef I have with Brent is I haven't got to meet him yet.

45's, 1 shim, 135 mains, UNI, BUBs. Dig it! I do!

Uncle Charlie

I don't know the proper jetting for them because like you guys I don't know any other of his mods.

The point of his comments were that he asked twice about the mains. That should have been resolved by Brent. The customer asked. Its not the suppliers fault, its Brent's. If you order a Chevy with a V-8 and it comes with a 6 you yell at the dealer, you don't tell the person to call the Mexican plant and talk to the line foreman.

Brent sold the pipes and shipped with the jets. Brent should get involved and help this person. Believe it or not, Brent got paid on the deal. He is a business.

Now I have done a blasphemous thing so am sure to be burned at the stake. I am with Duck, he is right and has a valid concern.

I can't see where it is anyones fault...the Secptre's ship from Team Triumph with their recomended size jets (122/45). Brent is selling a set of pipes supplied by a vendor..the included jets are what the vendor says use based on their test and experience. Is it Brents fault that Team Triumph supplies 122/45,? I don't think so. The purchaser got his pipes and if he is dissatisfied with the jets as supplied, well it is his responsibliliy to order and purchase additional jets.
All this bashing serves no purpose.

Thanks for the back-up saxt.

Bonny - I'm not crabbing about getting the wrong jets and I don't want new jets for free. If you read the thread you would see that I already ordered the 130's from Brent. I'm pissed that the pipes were back ordered for 3 weeks, I e-mailed newbonneville twice in that time asking about jet sizes and didn't get a response untill the day after they shipped. What good does that do me? The response I got was vague at best, and low and behold, the information in it was Wrong. As I stated before, I'll do my bussiness somewhere else next time. Don't flame me because I'm not happy with someone elses customer service.

Exactly! The way I read it the first time.

The stock main jet size on our Bonneville Americas was 110.

Not 120, not 122, but 110.

I speak from the perspective of a pre-fire bonneville america.

Check out this link to tJP's Tuning Notes for the Triumph Bonneville Family of Motosickles page 10.

Look in your manual at the specs page.

And furthermore the header pipes are NOT stainless steel.

Moe I would be the last person to not agree with you on Main jet size...but, my 2002 Boneville America, Black/Silver came new with 120/42. It was bought in early Oct of 2001.
The Triumph Service Manual on page 1.16 lists 790 cc America/Speedmaster as 120/42 and the 790 cc Bonneville/T100 as 110/40. As you know I have had a few different bikes and all of the 790 cc Americas/Speedmasters had 120/42. Thats 02, 03 (2), 04, 05, AND 06.

I can also confirm that my 05 America came with 120/42 which I replaced with 130/45 with the exhaust and airbox mods.

So did mine. 120's and 42's.

ditto!

Don't know what to say but on page 1.15 of the Triumph Bonneville, Bonneville America Service Manual (part number T3850902 issue 1 09.2001) Main Jet 110, pilot 40 etc...

I didn't replace the mains the first time (Vera was running way lean) the stealership did. This manual could very well contain more than one misprint but the mains I replaced when I re-jetted after the stealership did, were 115s or 118s can't recall which but they were not 12Xs. Go figure! Vera runs 122 with 48 pilots right now. These were the kits shipped with the Scepters back in July 26 2003. 4 years (almost) and loads of miles later she is running strong.

An error does exist on the above referenced page. The oil volume in the fork tubes is listed as 484 cc. The correct level is supposed to 548 cc (same manual page 11.11). Looking at the tJP page you'll notice that 865 speedmasters came stock with the larger jet kit.

Larry, you had a pre-fire. I have a pre-fire. I would like to think that Triumph was still trying to figure the jetting out and printed the manuals so early that they printed outdated jet sizes.

Yet, given the stealership re-jetted my lean bike with 115/8s, I'd say she came with the 110 as all the early literature that I can lay my hands on says so.

Matter of fact, I'll bet you a shiny beautiful chromed America front brake reservoir that Triumph installed different jets based on who nows what!

Look at the chain guards. Look at the side cover as the Bonneville suffix was phased out. At the tank console wiring harness. How all that stuff changed. I am thinking that my America was oem 110 40.

Who knows? But obviously this is one bet that no one can win.


I say it was the egg first.

I would definately go along with the fact that Triumph could very well have used different jets a various times in the early days....also about the data written up in the Service Manual...again all I do know for sure is my own experience with the bikes I have had...egg..chicken....?

Moe, I think you have found the problem. Your service manual is a 09/2001 manual. The America info was probably preliminary seeing that the bike came out in 2002. My shop manual, Part Number T3859909-01 issue 4, 10.2004 was released in 10/04 and on page 1.16 it has your specifications for the 790cc Bonneville/T100, but has 120/42 for the 790 America/Speedmaster.

Trivia for sure. I wish I had been the one to have re-jetted the first time. Be the one who held the mains and observed first hand what size they were, but alas, I wasn't. One day maybe someone could throw some light on the pioneering Bonneville America build. Most likely this will be discussed when our kids are our age and the conversations go like , "I remember when they came with 110s, they where called Bonneville Americas they had the tapered silencers, the fugly triple tree,..." Till then I'll have to keep reading articles by Roland Brown to see if this bit of trivia ever gets mentioned when he reminisces about the early days of Triumph's Hinckley parallel twins.

Larry,
In my case the pullets are first. I'll have to wait another 12 weeks for eggs as the ones I'm getting are started. (8 weeks old).

I hope my sceptres don't scare 'em too bad every morning!

Happy Saturday!

I wonder if early on they shipped Americas and standard Bonnies with the same jets, or at least intended to, then changed their minds early on to go with the 120/42's for the Americas.

120 main 42 pilot here too in my stock 04. Possible Benny , wouldn't be the first time an early bike came with a part that later needed to be tweeked to get it smoothed out.

My opinion is Brent should make good on the jets since he sold the pipes then Brent should take it up with the manufacturer if he wants to.

As far as then ordering the right ones from Brent , should have gone to a local shop and got a set for $3ea jet.

Just put the pipes on, the stock mains were 120's. The pipes are loud, the bike is fast. I'm a happy camper.