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| Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler. |
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02-13-2009, 01:12 PM
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#1 (permalink)
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Senior Member
Powerbike Favourite Bike: '05 Triumph Bonneville
Join Date: Jul 2008
Location: Buffalo, NY
Posts: 388 Other Motorcycle: '51 Harley Panhead Extra Motorcycle: '79 Harley Ironhead
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Jetting for Emgo Reverse Cones
I just fit the reverse cone mufflers to my 04 Bonneville that has no airbox mods (yet) besides snorkel pulled.
I have a pair of 115 main jets, will these suffice? I am putting in an order to NB at the moment for some other stuff so figured I'd ask!
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02-13-2009, 01:54 PM
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#2 (permalink)
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Senior Member
SuperSport Favourite Bike: 2004 Thruxton
Join Date: Jan 2008
Location: Grand Rapids, Michigan
Posts: 1,330 Other Motorcycle: 1971 BMW R50/5 Extra Motorcycle: 1971 CB350
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I know the guys with TORs run 118 or 120s with the stock airbox...probably wouldn't kill you to leave it be and see if you get popping on overrun. If you can't eliminate the popping by going out a turn on the pilot screws, then get bigger jets.
Either way, get an AI elimination kit while you're ordering if you haven't already...
--Rich
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02-13-2009, 10:31 PM
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#3 (permalink)
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Senior Member
Moto Grand Prix Favourite Bike: '03 T-100 & '08Tiger1050
Join Date: Aug 2004
Location: Stroud, OKlahoma, USA
Posts: 3,196
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I would recommend at least 120 main jets. Popping on decel overrun is controlled by your pilot screw adjustments--I would recommend you try about 2.5 turns out on the pilot screws. I believe some '04's still had the pilot screws covered with a small aluminum looking plug with a tiny hole in the center. If yours is this way (take a good mirror and look at the underside of the right carb--look at the front of the carb right next to where the heater wires connect. The pilot screw is beside the carb heater wire connections and to the outside of these connections. If yours has the plug you will see what I described above--it is about half the size of a dime. If yours doesn't have this, but you can see a screw with a slot in the screw, then it has been removed. If you see a screw with a "D" shape depression in the head, then you have the later model that takes a "D" tool for adjusting the pilot screws.
If yours has the plug that I described above, take a 1/8 drill bit and drill the hole in the center larger--this can be done by hand. If you have trouble doing this wrap some tape around the drill bit to make it larger where you are holding it. Once you have the larger hole in the plug, use a long "grabber" type screw and screw it into the plug a shot distance, and try to work the plug out with some pliers on the screw. If you are not in a hurry, cut a 1/2 to 3/4 inch piece off a 1/2 inch rod and drill a hole in the center of this that will clear the grabber screw threads but not the head of the screw. Put this on the grabber screw before you put it into the plug, and use the "hammer" you just made out of the short piece of 1/2" rod to hammer the plug out "slide-hammer" style.
To adjust the pilot screws (mixture screws to some), screw them all the way in (lightly) and then screw them out counting the number of turns.
__________________
Larry
2003 T-100 (790cc), NARK, NH Togas, 8100 rpm rev limiter, 158 main jets, 42 pilot jets (less than 1 turn out on pilot screws), stock needles--no shims. 13 A/F ratio from 1100 rpm to 4000 rpm; 12 A/F ratio from 4000 rpm to 6000 rpm; 13 A/F from 6000 rpm to 8100 rpm.:D
2007 Tiger 1050--White:D--SW-Motech crashbars, Skidmarx rear hugger/chain guard, Calsci +7 windscreen.
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03-28-2009, 05:07 PM
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#4 (permalink)
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Senior Member
Powerbike Favourite Bike: '05 Triumph Bonneville
Join Date: Jul 2008
Location: Buffalo, NY
Posts: 388 Other Motorcycle: '51 Harley Panhead Extra Motorcycle: '79 Harley Ironhead
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So, I put these on today. What a pain in the A$$! Emgo supplied some exhaust shims which barely work with the adapters. Used half a tube of hi-temp sealant, hopefully it'll keep it from leaking. Changed to 120 jets, will let you know how everything turns out.
Honestly if this doesn't pan out I'm ditching the emgos and going with some Preds or something.
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03-28-2009, 05:23 PM
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#5 (permalink)
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Senior Member
Powerbike
Join Date: Jun 2008
Posts: 382
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I've had Emgo reverse cones for close to a year now. Chrome is still nice and shiny and they were a perfect fit when mounting. I got mine from Specialty Spares and he supplies a nice adapter to make 'em fit. I am at 6200 feet and I am running 122's. Air box has no snorkel. I started at 130's and have gotten tighter and tighter on the jets. I think 122's work well at my altitude, so I'd go maybe one step up for, at least, for Buffalo.
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03-28-2009, 05:25 PM
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#6 (permalink)
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Senior Member
Powerbike Favourite Bike: '05 Triumph Bonneville
Join Date: Jul 2008
Location: Buffalo, NY
Posts: 388 Other Motorcycle: '51 Harley Panhead Extra Motorcycle: '79 Harley Ironhead
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Thanks for the advice. I'll ride and check the plugs soon. Sealant is "curing"... know I should leave it be for a while but am too anxious.
Side stand is hitting the muffler. Hm...
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03-28-2009, 09:09 PM
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#7 (permalink)
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Senior Member
Pole Position
Join Date: Jun 2005
Location: Stuart Fl
Posts: 3,753
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Emgos
Just did the kit from Bella. It came w/ 130's. So far- so good. Gave a nice little boost @ top rpm! Will see how they work in the long run?
__________________
CAPT D
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03-28-2009, 11:11 PM
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#8 (permalink)
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Senior Member
Moto Grand Prix Favourite Bike: '03 T-100 & '08Tiger1050
Join Date: Aug 2004
Location: Stroud, OKlahoma, USA
Posts: 3,196
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Side-stand cure: Cut a piece of thick leather...about an inch square. Use some of your left over elephant snot--I assume you have a little dab left. Stick the leather to the frame side of the inside of the elbow joint formed by the side-stand and frame. My piece of leather has been in place for 22000 miles now.
__________________
Larry
2003 T-100 (790cc), NARK, NH Togas, 8100 rpm rev limiter, 158 main jets, 42 pilot jets (less than 1 turn out on pilot screws), stock needles--no shims. 13 A/F ratio from 1100 rpm to 4000 rpm; 12 A/F ratio from 4000 rpm to 6000 rpm; 13 A/F from 6000 rpm to 8100 rpm.:D
2007 Tiger 1050--White:D--SW-Motech crashbars, Skidmarx rear hugger/chain guard, Calsci +7 windscreen.
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03-29-2009, 12:16 AM
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#9 (permalink)
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Senior Member
Powerbike Favourite Bike: '05 Triumph Bonneville
Join Date: Jul 2008
Location: Buffalo, NY
Posts: 388 Other Motorcycle: '51 Harley Panhead Extra Motorcycle: '79 Harley Ironhead
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Sounds killer and completes the look of my bike (FEK, NH rearsets and m-bars)
I have an exhaust leak on the right side. Too bad I threw out the rest of the tube of sealant. It'll have to be until I go to NAPA again. 120s seem to work really well.
I've emailed Specialty Spares about their adapters as I've heard that they're an easy fit. Something about the stupid shims and all that sealant just doesn't sit right, even clamped down the can did move (while sealant was still "wet") around on the adapter a bit :-(
Guessing at some point I'll have to change the wrap on the baffles, can't imagine them holding up to being pounded back into the muffler.
Suggestions?
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03-29-2009, 10:48 AM
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#10 (permalink)
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Senior Member
Pole Position
Join Date: Jun 2005
Location: Stuart Fl
Posts: 3,753
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Emgos
I havent seen 1 set that sealed perfect yet! Pounding baffles?? Why? I dont think the Emgos will like that too much!!!! Anyhow- I love mine! The sound & the look. My stockers even leaked a small bit- no big deal! They seal up tighter when they heat up.
__________________
CAPT D
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