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Discussion Starter #1
Hey everyone!

So, I know this is random but I live in NYC, and my motorcycle is in storage quite far from me so I can't just go out into the garage and measure this up.. so, maybe one of you can for me?

I'm planning on putting PODS or velocity stacks with filters on my Triumph, but I need to know the size snorkel I should be looking for. I suppose I need the O.D. of the carb intake.

I have a '95 THUNDERBIRD, BTW. All stock for now..

I would really appreciate it, thank you!

Jim
 

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Hi,

It is not so simple as measuring the O/D, as you can see from looking at the carb on the left in this picture:



Pods tend to be fitted to the later model's Keihin carbs (right-hand carb).

Good luck,
Geoff
 

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Hey everyone!

So, I know this is random but I live in NYC, and my motorcycle is in storage quite far from me so I can't just go out into the garage and measure this up.. so, maybe one of you can for me?

I'm planning on putting PODS or velocity stacks with filters on my Triumph, but I need to know the size snorkel I should be looking for. I suppose I need the O.D. of the carb intake.

I have a '95 THUNDERBIRD, BTW. All stock for now..

I would really appreciate it, thank you!

Jim
That one has the mikunis, correct?

Measurements are 58mm wide by 62mm tall, with a center to center spacing of 90mm. Emgo 60mm ID pods fit perfect, and at sea level you should be able to get away with 42 pilots and about 140ish mains, with the clip in the next to last slot down. I am at ~2000 feet (Las Vegas) running 40s and 132.5s and I am not terribly lean, although it could use some tweaking.

Merlyn
 

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Discussion Starter #4
Thanks to you both, this is invaluable. Yes Merlyn they are Mikuni's.

Thanks!!! I love this board.




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This is the ONLY info I can find about podding Miks -





That is from the "known setups" thread. He's using 155 mains and reckons it runs good, although most info points to pods on Miks being a real PITA to get running properly.

I also have them and will be trying pods in the future, so keep at it and please post anthing you learn.
 

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Discussion Starter #6
Will do thanks! Also, I see on the Mikuni's they have that upper "lip" or "eyebrow" that makes them oval. What is that? Wouldn't it be better to maybe file it down and make them round?




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Oooooh no, that hole is the air balance inlet for the throttle slides. Play with that at your peril!

Although I'm starting to wonder if the main reason that pods have problems is because they block that inlet, as Merlyn here seems to have had luck with his -

http://www.triumphrat.net/maintenance-tips-and-tricks-for-the-t3-classics/66638-proven-setups-for-hinckley-classics-carb-jets-pipes-airbox-cams-etc-3.html#post2388811

The only thing I'm not too sure about yet is whether they rely on the slight increase in vacuum present in the airbox plenum to assist in raising the slides or not.

If not then theoretically you could, as you said, file the lip off and leave them open to the atmosphere. Although if you manage to get the correct pod filters that don't interfere with (block) them, then that would be unneccessary work anyway.
 

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Discussion Starter #8
Hey AfterBrick - I agree, I don't think I'll be filing these off based on what you're saying here.. however, I would try it if I had a spare set of these carbs. I think that this will be the trickiets and most challenging aspect of my build, but I'm looking forward to it.

I'll remember I said this when I'm posing on here rants about not getting my bike to run right.. lol..

Merlyn, I saw your post in "proven setups" and looks good. I am however investigating velocity stacks with screens (and foam) so my setup could be a variation on your theme.. I may have to go with different mains, but we'll see. I'm not exactly a carb tuning guru here.. but I have a feeling I will be when I'm done. ..

Jim
 

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Hey AfterBrick - I agree, I don't think I'll be filing these off based on what you're saying here.. however, I would try it if I had a spare set of these carbs. I think that this will be the trickiets and most challenging aspect of my build, but I'm looking forward to it.

I'll remember I said this when I'm posing on here rants about not getting my bike to run right.. lol..

Merlyn, I saw your post in "proven setups" and looks good. I am however investigating velocity stacks with screens (and foam) so my setup could be a variation on your theme.. I may have to go with different mains, but we'll see. I'm not exactly a carb tuning guru here.. but I have a feeling I will be when I'm done. ..

Jim
The tuning part should be relatively simple- I'd start at 42/140 or 145 and have a set of 45 pilots and 155 mains on hand. Pulling the carbs and changing your tune once you get rid of that airbox is a 10 minute proposition. Finding velocity stacks that will fit those damn oval mikunis may get interesting though. Do keep us posted- if you can find stacks that work, I might try those myself.

Merlyn
 

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Discussion Starter #10 (Edited)
Hey guys,

Quick update - I found a great site that has a lot of velocity stacks, with filters (foam and screen and combination of those two) as well as all-weather covers. Anyway, I have been emailing back and forth with them, and they had a customer with a similar setup as those of us here with Mikuni's. Anyway, check out this picture.

The carbs here have an I.D. of 55mm, so they made a 54.8mm one that slid right in. They said this was for a car, but the carbs are identical.

Anyway, I just thought I would share! PS, here is the site, they are SO NICE and SO HELPFUL. I highly recommend them.

http://www.pjmotorsports.com/velocity-stack-filters.html

Picture:

http://jimbot.smugmug.com/Motorcycles/Triumph-Restoration/i-zxHdZCX/0/S/velocity-stacks-on-mikuni-S.png

http://jimbot.smugmug.com/Motorcycles/Triumph-Restoration/i-nVR9TMg/0/S/Velocity-stacks-on-mikuni2-S.jpg

http://jimbot.smugmug.com/Motorcycles/Triumph-Restoration/i-WKKLFs9/0/S/Velocity-stacks-on-mikuni3-S.jpg

http://jimbot.smugmug.com/Motorcycles/Triumph-Restoration/i-cQsLhMd/0/S/velocity-stacks-on-mikuni4-S.jpg
 

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Hey guys,

Quick update - I found a great site that has a lot of velocity stacks, with filters (foam and screen and combination of those two) as well as all-weather covers. Anyway, I have been emailing back and forth with them, and they had a customer with a similar setup as those of us here with Mikuni's. Anyway, check out this picture.

The carbs here have an I.D. of 55mm, so they made a 54.8mm one that slid right in. They said this was for a car, but the carbs are identical.

Anyway, I just thought I would share! PS, here is the site, they are SO NICE and SO HELPFUL. I highly recommend them.

http://www.pjmotorsports.com/velocity-stack-filters.html

Picture:

http://jimbot.smugmug.com/Motorcycles/Triumph-Restoration/i-zxHdZCX/0/S/velocity-stacks-on-mikuni-S.png

http://jimbot.smugmug.com/Motorcycles/Triumph-Restoration/i-nVR9TMg/0/S/Velocity-stacks-on-mikuni2-S.jpg

http://jimbot.smugmug.com/Motorcycles/Triumph-Restoration/i-WKKLFs9/0/S/Velocity-stacks-on-mikuni3-S.jpg

http://jimbot.smugmug.com/Motorcycles/Triumph-Restoration/i-cQsLhMd/0/S/velocity-stacks-on-mikuni4-S.jpg
Mount the stacks INSIDE the carb... BRILLIANT!

Looks nice too. Once I get through throwing money at Belle's engine, a set of those might just be in her future...

Merlyn
 

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Discussion Starter #12
I know right? Funny how sometimes the answers are just staring at us in the face.

I'm not sure on the screws though - I'm thinking more like a space age epoxy will do the job, something fuel resistant.. I'm researching that now.. so anyway, I won't be tearing into this until November so the updates will be fewer and farther between, but I'll keep this going.

Merlyn, I think you and I will have a lot to talk about in the near future!

Jim
 
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