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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 07-18-2005   #21 (permalink)
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After doing this mod a week or so ago I felt the need to richen things up just a bit for my own peace of mind. On a hunch I went to my local MC shop. Not a Triumph dealer. Mostly used bikes and Royal Enfield. But, they do road race. I asked if they had any Keihin jets and they had a whole selection of them. Mostly aftermarket stuff, but the price was right at $3.00 each. I selected a pair marked "112.5". Put 'em in and installed the stainless screw set at the same time.

Now my Bonnie pops less on deceleration, and has slightly better throttle response, though I doubt it is any faster.


I'm happy.


Great post and pics BTW.
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Old 07-19-2005   #22 (permalink)
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Answers to the many questions since my original post…

Quote:
Did you have to rejet after doing this mod?
I didn't re-jet and it still seems to run fine. Many have posted before that re-jetting isn't necessary with this mod. If it had been necessary, I wouldn't have done it. I'm still scared of carburetors. All that talk of shims, jets, needles, mixture screws… I'm afraid I'd really screw it up. What we need is some "how to re-jet" posts complete with pictures. If someone will show me how to do it, I'll write it up and post here.

Quote:
How do they sound inside your helmet when you're on the freeway?
Haven't had a chance to run on the freeway yet, but my guess is you won't hear them much. I mostly hear engine noise just sitting on the bike in the driveway at high revs, unless the exhausts are pointed at something to bounce the sound back (like the side of the house).

Quote:
Someone buy this guy a drink or make him President.
I'd rather have the drink.

Quote:
By the way, how did you post the pictures in your note? For future posts it would be helpful for all of us to learn how to do that.
The trick with posting pictures to this forum is that you first must have the pictures on the web somewhere. Then when you type up a new post, you click this button:



and a little form will pop up and ask you to type the URL for that image. Then some text will get inserted into your post that contains the URL of the image you just typed into the box (or you could just type the text yourself).

I'm an information technology professional by trade (i.e. computer geek) and have my own web server so getting pictures on the web is easy for me. I don't know what other people do. I've read a suggestion that you can uploading your images to the members photo album here on this site, and then use the URL for those in your post.

It sure would be a lot easier if you could just upload your image files for a post, while you are composing the post.

If you really get desperate, email me your photos and I'll put them on my web server and give you the text to place in your post for them to show up.

Quote:
Did you try to drill through the remaining baffles?
No. I've read that would require re-jetting.

Quote:
does the growl now drown out the knitting needles?
Only at idle, or maybe if you are behind the bike. At high revs, I only hear engine noise. I don't know anyone who'll drive my bike besides me, so I don't know what it sounds like from anywhere except being the rider.

Quote:
Why is their a hamster in our exhausts?
Apparently they were hiding from the knitting needles.




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Old 07-19-2005   #23 (permalink)
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KD,just one more note.When you drill thru the end of the pipe,you are removing the core only.Right inside the end of the pipe there is still a short piece of baffle that is under the rolled chrome lip of the pipe.After a while,mine started to rattle a bit.I drifted them forward and got a punch under the little rings of metal,deformed them and removed them with pliers.They make the pipes opening look even bigger.You can see the rusty pipe in fig.2 surrounding your socket. Good improv on my EZ-out too.
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Old 07-20-2005   #24 (permalink)
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Quote:
After a while,mine started to rattle a bit.I drifted them forward and got a punch under the little rings of metal,deformed them and removed them with pliers.
Thanks for the tip. I'll be checking mine to see if those rings come loose.
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Old 03-19-2006   #25 (permalink)
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hmmm, i think i will try this,, i'll post pics up
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Old 03-20-2006   #26 (permalink)
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Just be sure to use a durable drill and follow the instructions;I did this in about 5 minutes total for the first 2 baffles.
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Old 03-21-2006   #27 (permalink)
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Thanks, this makes it so much easier for me. i've been planning on doing this

[ This message was edited by: Germ on 2006-03-25 11:10 ]
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Old 03-24-2006   #28 (permalink)
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Unless I'm missing something, this needsa be bumped up.

Or made a sticky.

Or both.
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Old 03-24-2006   #29 (permalink)
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Fantistic post and instructions!!!

This is going to be one of those all-time save threads.

:gpst:


It's amazing what you can learn on this site. My biggest fear now is taking my bike to a dealer and worrying that I know more about the workings and mods of a Bonnie then they do.
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Old 03-28-2006   #30 (permalink)
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Does someone know a way to deal with the stock Thruxton baffles?
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