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Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler.

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Old 12-01-2012, 05:43 PM   #1 (permalink)
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So, yeah, I'm an Oddball . . .

. . . but I want to put the stock pipes back on my 2002 Bonneville. All I know for sure about the mods done by the PO:

--AI removed
--TORs added
--Main Jets changed to 122 or 125's
--No idea on how far out the mixture screws are set

My questions: can I replace the TORs with the stock pipes and leave the larger main jets? What would be the potential problems? And if I end up having to go back to stock 110 jets, how many turns out should the mixture screws be?

Thanks in advance.
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Old 12-01-2012, 06:48 PM   #2 (permalink)
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You'll run very rich.

That said, do you need stock pipes? PM me.
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Old 12-01-2012, 09:05 PM   #3 (permalink)
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Actually, the PO gave me the stock pipes with the bike--but thanks.

I guess I'm wondering if "very rich" is "too rich?" One dealer/tech told me all the Bonnies come out of dealerships running way too lean--but would the larger jets over-correct that issue?

As you can tell, part of my problem is that I'm just unsure how all the jets and needles and shims work--I've started studying the stickies to educate myself, but I feel like I'm more confused than I was!
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Old 12-01-2012, 10:07 PM   #4 (permalink)
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Want to sell the TORS?

Rick
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Old 12-01-2012, 10:27 PM   #5 (permalink)
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I think you are going to be too rich. You need to establish what has been done. The 125 on a 790 motor would suggest exhaust and maybe a free flow filter. Also a lot of people seem to bump up pilot jets to 42. You need to establish whether the snorkel has been removed (L) side panel. If that has been removed might be worth checking the restrictor plate is still there, at the jetting you mentio should be, remove air filter and feel in the airbox. Shims you will need to take off the carb top and see if a shim has been installed.
Standard settings 110 main, 40, pilot, 0 shims, Pilot screw is @2.5 turns.
I think if you revert to standard pipes she will run a bit lamely!
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Old 12-02-2012, 08:30 AM   #6 (permalink)
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QUOTE - I think if you revert to standard pipes she will run a bit lamely!
Too right, and all you'll hear is the engine and gearbox whirring !!!
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Old 12-02-2012, 08:45 PM   #7 (permalink)
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Thanks for the input. If I go ahead with the switch back to stock tune and don't like it, I'll let you guys know so you can say, "I told you so."
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Old 12-02-2012, 08:46 PM   #8 (permalink)
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Quote:
Originally Posted by RickMcCl View Post
Want to sell the TORS?

Rick
And no, I'd better not sell the TORs just yet since it seems I'm going to be so unhappy with the stock pipes!
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Old 12-02-2012, 08:49 PM   #9 (permalink)
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The Tors are very close to the stock pipes really.. IMHO the are what the stocks shoulda been.. Your gonna open a can of hassle for very little result.
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Old 12-03-2012, 04:41 PM   #10 (permalink)
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Find a shop that has an exhaust gas analyzer. That will get your carbs spot on and you won't have any doubts.

BTW, you're not so odd. I have the stock pipes with no plans to change. Loud pipes make you tired and irritate your neighbors.
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