Pod mod idea

I wonder if one could use pods without messing with the jets by controling their flow. make a 1/4 " hardware cloth screen for each and put carb foam in them. Reduce the foam amount until the plugs look correct.
Any naysayers? HAHA! I mean anyone agree?

 

You need to read this, - -

http://www.xjbikes.com/Forums/viewtopic ... ction.html

Then we can kick around some ideas.
Restricting the airflow makes it richer.

 

This is my buddies chop. If you look closely at the picture, he made an airbox in the shape of a maltese cross. On the bottom of the box (by the engine) he cut a 2" round hole with a screen over it, and thats it. The bike runs awesome.
http://i229.photobucket.com/albums/ee30 ... 098024.jpg

 

Man what incredible luck! When I read about the 10 Japs taking thousands of hours to come up with a frame that could accomadate The superspecial airbox and boots I was ready to give up on the pod idea.

 

I would have never believed his bike would run as well as it does, with his box on there. But like I said, my bike ran amazing with just an open factory airbox, without a filter. I don't know why but it did. He has rejetted because he has open pipes as well. He went -1,+2 on the sprockets. The bike screams, sportbikes from stoplight to stoplight can't believe how fast it is.

 

Ok...read it all. My take was pods are too free flowing to allow the CVs to operate correctly or eventually too lean. Thats why I suggested slowing that flo a little bit to develop some vac. Foam and screen are cheap and where I drive WOT is practically impossible. Idle and lo to mid is my concern. But .... since I have installed all the stock stuff anyway I won't even consider restling that box out of there. Just like the looks of the Pods and trying to stimulate some ingenuity. Besides...I have a 16oz mug of coffee to kill before I start doing what the wife planned for me today. :lol:

 

Because these motors will absolutely SCREAM if running slightly TOO lean... until they blow up.

 

Sounds pretty tricky. Running lean don't take very long at all to do some serious damage. Tulipped valves can be changed out but an AL head.... oh well. Toast?

 

I new she was lean, my pipes started to blue, so I threw some pods on there until I can rejet. I would rather just build an airbox and use some of that air filter material and a screen so I wouldn't have to rejet.

 

wait, what? it was running lean, so you removed the air box and put on pods? Thats like fighting a fire with gasoline

 

You know, this does not need to remain a mystery, the idea that some XJ Bikers will run Pods, on a reasonably intact 750.
All it would take is a trip to a Motorcycle Dyno, and a set of jets, and some patience. The technician could work out the rest, for about $250 tops.

Split that up over the next hundred people asking how to tune for pods- - works out to $2.50 a person.

We'll let RickCoMatic do the collection. Everybody's happy.

 

Except jetting would differ between brands of pods used, type of exhaust, altitude, state of tune, etc. You could probably get a "ballpark" jet setting, but not a definitive setting.

 

somewhere along the line to get it right your going to have to change the air jets in the intake throat and under the diaphragm and thats going to stop that project right there

 

. . . And this is why nothing ever gets done around here.

Some people have solved the puzzle without spending the $250.00
The mysterious formula has been solved by a few people.
Their success stories should be documented in detail, to aid the new folks in their quest for Pod Modding Nirvana.
It would take TIME to dig the info out of the archives, and post them in a concise thread.

 

My biggest fear is that those whose bikes weren't running too well before the Pods went on, and experienced their bikes "Running much better" after the Pods went on, are just running the bike lean.

I'm afraid that an owner wanting the "Hot-Rod Pod" look, aren't doing too much of anything else besides chopping-out the Airbox, throwing-away the Boots and Clamps and unpacking a box of Pods, whipping them on the bike and saying that their lean-running bike is just the cats pajamas and everybody ought to do what they did.

Misery loves company.

 

I've got air jets in every color (well, size......) of the rainbow for most of the Hitachi and Mikuni carbies.

The Miks use semi-non-replacable main air jets, although you could carefully drill them open larger, I suppose.........if you were a glutton for punishment! The pilot air jets on the Miks are replacable, as are the the pilot and the main air jets on all Hitachi carbs.

 

hey, I remember someone finding plastic jets in their carbs... wouldnt those be really cheap? and then when you're done tuning, you can buy the brass size of the plastic ones?

 

what about the air jets in the intake throats ?

 

Precisely why I shot and posted the video of my bike starting, idling, revving perfectly without misses or backfires. Pod arguments are boring. I'm over 10,000 miles on my stock jets and pods without burned valves, or holed pistons, etc. like everyone PROMISED I'd have. Last post ever about pods from me. I'm over it.

 

Are you talking about the removable brass jets in the Hitachi (32-series) carb throats (where the airbox boots are attached)?

If so, those are huge jet, and as far as I can tell, they are only used to pressurized the bowl to atmosphere, and don't really "restrict" or meter the air at all (in other words, the air passing thru there doesn't mix with fuel). In the HSC33 series carbs (700 air cooled) they did away with those jets and it's just an open passage).

If not those jets, then tell me more!

 

yep that's them,it seems like they should have a purpose since everything on them works on pressure differential
i don't know, makes my head hurt

 

I did this mod.

Somehow, my bike still runs too rich at every throttle position and WAY too rich at WOT (no power, the bike simply starts to die unless I let go.)

Somehow, mine is the exception in that it always happens to run too rich.