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| Twins Talk Discussion of Hinckley Triumph Twin related matters and topics. |
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06-26-2009, 01:45 AM
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#1 (permalink)
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Senior Member
Powerbike Favourite Bike: 2008 Bonneville Black
Join Date: May 2007
Location: Portland, OR
Posts: 384
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Question about airbox removal/bellmouth
So, I'm having the bike in for the first service next week, and at the same time they're going to remove the AI, put on some Norman Hyde Togas and re-jet.
As of right now, I haven't scheduled any changes to the stock airbox.
Is it dumb to have them do this stuff without upgrading to a bellmouth or the NARK? Because I'm guessing if I wanted to do that later, they'd have to re-jet again?
I've got 550 miles on the clock now and I absolutely love the bike, but the stock power isn't overwhelming. Will the addition of the nh togas give me that little boost I'm looking for all by themselves, or do I really need to be opening up the air intake as well to get that benefit?
Thanks in advance.
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06-26-2009, 11:22 AM
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#2 (permalink)
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Lifetime Premium
Site Supporter World SuperBike Favourite Bike: 09 Sprint ST ABS
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You will notice a little difference, I'd say more "throttle response" than horsepower. But you know, to get the full advantage, drop the airbox. Loud pipes = power in all cases....LOL!
You will notice more HP as the engine loosens up, just ride it to do that. I have to say, for such an easy job(changing pipes and jetting) they are going to charge you a fortune, It may be worth your while to get a Manual and try to tackle these yourself! at least the pipe change. It's really satisfying to do some work yourself!
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09 Sprint ST-Trident exhaust,rear fender tidy.
You can take the boy out of Texas, but you can't take Texas out of the boy.
Last edited by Billbikes; 06-26-2009 at 11:26 AM.
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06-26-2009, 12:45 PM
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#3 (permalink)
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Senior Member
Powerbike Favourite Bike: 2008 Bonneville Black
Join Date: May 2007
Location: Portland, OR
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About as far as I get mechanically without further training is tightening/lubing the chain, changing the spark plugs, etc. I've looked over the guide to re-jetting with pictures and it is far, far beyond my abilities.
90% chance I screw something up and end up having to get the bike towed. And that's not really an option for me, because the bike is my only means of transportation!
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06-26-2009, 03:46 PM
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#4 (permalink)
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Senior Member
SuperStock Favourite Bike: 2008 Bonneville Black
Join Date: Jun 2008
Location: Philadelphia, PA
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hey man. if you can at least install the pipes yourself, they are really easy. a good search on the forum will set you straight. save that extra bit of cash for new gloves or goggles or something.
i did my pipes and i only had 500 miles worth of motorcycling experience and ZERO in any sort of mechanical setting.
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`ends
"Maturity is a high price to pay for getting older"
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06-26-2009, 04:12 PM
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#5 (permalink)
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Senior Member
Formula Extreme Favourite Bike: Bonnie
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Quote:
Originally Posted by Billbikes
You will notice a little difference, I'd say more "throttle response" than horsepower. But you know, to get the full advantage, drop the airbox. Loud pipes = power in all cases....LOL!
You will notice more HP as the engine loosens up, just ride it to do that. I have to say, for such an easy job(changing pipes and jetting) they are going to charge you a fortune, It may be worth your while to get a Manual and try to tackle these yourself! at least the pipe change. It's really satisfying to do some work yourself!
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how many mile would you say the engine starts to loosen up? Can everyone else here their valves?
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www.smartHUDsystem.com
2008 Bonneville
AI removed || DNA pods | 155 main/42 pilot | EMGO slip-ons
Superbars | Napoleon bar-ends | Tank pads | Fork gators
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06-26-2009, 04:32 PM
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#6 (permalink)
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Senior Member
Powerbike Favourite Bike: 2008 Bonneville Black
Join Date: May 2007
Location: Portland, OR
Posts: 384
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Quote:
Originally Posted by endswithaW
hey man. if you can at least install the pipes yourself, they are really easy. a good search on the forum will set you straight. save that extra bit of cash for new gloves or goggles or something.
i did my pipes and i only had 500 miles worth of motorcycling experience and ZERO in any sort of mechanical setting.
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Well, the shop has the pipes, fwiw. It's not like they're sitting in my garage. If I had them, I'm sure I could install them but I figure it's hardly worth my time to bother. The rejet represents a much larger portion of the labor than just sticking the pipes on -- and there's no way I will attempt a re-jet on my bike, so I figure they might as well just do both.
I know the bike will sound great with the new pipes, but my question is whether I should pull the snorkle, change the air filter and/or intake or do the whole bloody NARK while they're already re-jetting the bike. Because there is no way in hell I can rejet it myself, and I'll have to bring it back in for another chunk of expensive labor.
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06-26-2009, 08:12 PM
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#7 (permalink)
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Senior Member
Formula Extreme Favourite Bike: 2006 Thruxton Caspian Blu
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If you are already considering a NARK I would do it and get it over with...I am taking the slow retarded route and I did remove the snorkel and the airbox restrictor plate and rejet and I would do it again but I did my own work...If I was paying someone else I would just pull the airbox now and get it done...and not pay to do it later...I can hear Mike laughing now when he reads this since he told me the same advice but I took the long way there...
a 140 main jet seems to be the main jet choice from what you will find here or your shop may have an idea as well...let us know how it goes...
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06-27-2009, 08:35 AM
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#8 (permalink)
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Loose Head Administrator
Site Supporter Supernova Favourite Bike: 2011 Tiger 800XC
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I think it is totally cool for someone to admit that mechanical skills are not their strength, and to pay someone else to do the work. It is worth having a good look around the forum to see if there is any part of it you are comfortable with.
The only trouble is, that not many dealers are very good at tuning carburettors these days. When you do this modification, you need to be prepared to test the bike, and make adjustments to suit your particular machine and configuration.
So if you are dead keen on doing it, your first piece of research should be to find a dealer / shop that knows how to adjust carbs to get air / fuel ratios right. Maybe find a dyno outfit near you that can do it. When set up right, these derestriction mods really give you some good torque and throttle response, but if the carb set up is off, you can end up being very disappointed.
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06-27-2009, 08:45 AM
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#9 (permalink)
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Lifetime Premium
Site Supporter World SuperBike Favourite Bike: 09 Sprint ST ABS
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+1 on what Prop said. I've always been a tinkerer, I guess I sometimes think everyone is like me. There's nothing wrong with that, it's just cheaper to do some yourself. I'm also a cheapskate...LOL
__________________
09 Sprint ST-Trident exhaust,rear fender tidy.
You can take the boy out of Texas, but you can't take Texas out of the boy.
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06-27-2009, 12:03 PM
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#10 (permalink)
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Senior Member
Powerbike Favourite Bike: 2008 Bonneville Black
Join Date: May 2007
Location: Portland, OR
Posts: 384
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Quote:
Originally Posted by propforward
I think it is totally cool for someone to admit that mechanical skills are not their strength, and to pay someone else to do the work. It is worth having a good look around the forum to see if there is any part of it you are comfortable with.
The only trouble is, that not many dealers are very good at tuning carburettors these days. When you do this modification, you need to be prepared to test the bike, and make adjustments to suit your particular machine and configuration.
So if you are dead keen on doing it, your first piece of research should be to find a dealer / shop that knows how to adjust carbs to get air / fuel ratios right. Maybe find a dyno outfit near you that can do it. When set up right, these derestriction mods really give you some good torque and throttle response, but if the carb set up is off, you can end up being very disappointed.
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I talked to both local Triumph dealerships before deciding where to go for this. Not to disparage the first one, because they seemed friendly enough, but the second one (Cascade Moto Classics) really went above and beyond. Plus, they had a bike with the togas installed that I could listen to -- and they have a dyno.
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