Pod problems

[rangerguy302]

Ok, so I got a set of pods for the battle ship and immediately noticed they were blocking the air vents. I made a manifold to insure the Jets were clear and it worked but as soon as I put the pods on the manifold the bike falls on its nose at 6k. With the filters off it runs like crazy all the way to red line. Think the filters are just that damn restrictive? Could use a oppenion that's not mine....

[BA80]

The 005-121's

http://yamahazone.biz/airfilters.html

I was just in Billings over Christmas weekend.

[skids]

Ok, so I got a set of pods for the battle ship and immediately noticed they were blocking the air vents. I made a manifold to insure the Jets were clear and it worked but as soon as I put the pods on the manifold the bike falls on its nose at 6k. With the filters off it runs like crazy all the way to red line. Think the filters are just that damn restrictive? Could use a oppenion that's not mine....

It is more than just restriction, the length of the manifold and geometry of the filters has something to do with it. Try bigger mains.

[rangerguy302]

The mains are 147.5, do they make bigger?

[rangerguy302]

I'll have to pull the manifold off to send a pic but it's just a rough one made from 2'' PVC fittings, 2 three hole and 2 four hole fittings cut to length and all piped together. I figgured it would deliver free flow to each carb. With the filters off though like I said it runns like crazy. That's why I just thought it was cheap restrictive filters. I'll just poke a hole in them....😂😂

[BA80]

Yup......... If you want a link I'll post it. Just ask.

[rangerguy302]

Yes please!!

[madmax-im]

what kind of pods did you buy? There are some that restrict airflow because of a lip on the inside diameter ...cheap aftermarket pods like EMGO...are just that cheap...

[BA80]

Yes please!!

Order the genuine Mikuni or you'll have issues. (experience). See my signature for what I'm running. I get crappy mileage unless I go slow but the bike runs like crazy.

http://www.jetsrus.com/a_jets_by_carburetor_type/jets_mikuni_N100-604_main_Large_round.htm

[motoman]

I'll have to pull the manifold off to send a pic but it's just a rough one made from 2'' PVC fittings, 2 three hole and 2 four hole fittings cut to length and all piped together. I figgured it would deliver free flow to each carb. With the filters off though like I said it runns like crazy. That's why I just thought it was cheap restrictive filters. I'll just poke a hole in them....😂😂

If your thinkin' doing the pod thing is gonna magicly somehow give you more power....your dreamin'. Did you ever think to re-set idle mixtures and re-sync?....doubtful. Do THAT first, THEN if that didn't help, then jump UP a step in main jets Genuine(Mikuni ONLY, no RD or K&L copy crap). Gotta watch bike shops, as they haven't a clue as to correct flow differences. Yamaha DEALER locally IS gonna be your only option, as Mikuni is a subsidery of Yamaha..unless of course you order online, and hope the heck you don't receive some copy junk.

[TopCatGr58]

I'll have to pull the manifold off to send a pic but it's just a rough one made from 2'' PVC fittings, 2 three hole and 2 four hole fittings cut to length and all piped together. I figgured it would deliver free flow to each carb. With the filters off though like I said it runns like crazy. That's why I just thought it was cheap restrictive filters. I'll just poke a hole in them....😂😂

Hey Ranger,

From what you said above, sounds like you made a Manifold to link all of the carb intakes TOGETHER into one filter mount??? A photo of your design would be very helpful.

However, did you see this thread/tech tip in the MODS section on how to mount Pods with various types of velocity stack designs?

http://www.xs11.com/forum/showthread.php?t=8269

The Pod filters flow very easily when there are 1 for each carb, but if you're running all four carbs thru 1 pod filter, then that could be why it's restricting the airflow and not allowing the vac. slides to rise enough to allow enough air in to feed those large 147.5 main jets!

What other intake/exhaust mods are you running? Stock jets are 137.5 for the early carbs, and the jetting guide suggests 2 for pipes, 2 for pods, but subtract 1 for combined for a total of 3 steps = 145.0's, and then monitor by checking plugs with throttle chop technique for too rich/lean....or just right. Just be aware as was mentioned by Greg/BA80 that you need to be using Genuine Mikuni jets, generic may be numbered the same, but are not made the same and often run larger than stated size=too rich.

T.C.

[red bandit]

http://www.bikebandit.com/aftermarket-parts/motorcycle-fuel-and-air/carb-kits-parts-accessories-universal/mikuni-large-round-main-jet-kn100-604-4-pack

[BA80]

http://www.bikebandit.com/aftermarke...100-604-4-pack

Not genuine Mikuni

[red bandit]

They used to be but I haven't bought from they in a while so I will take your word for it.

[TopCatGr58]

Well, The BB page has this on the page!

Mikuni Large Round Main Jet (KN100-604) 4-Pack

Specifications and Options
Brand Mikuni

Tried to look at the jet heads with the zoom tool, but still not able to see the double diamond Mikuni logo, but everything else says Mikuni, so if they aren't then it's false advertising!?

T.C.