About to pull out what little hair I have left

[Rob S.]

Good points, Mmattockx.

Of course, here in the big apple, ask someone you've known for forty years to fudge on the emissions test, and they react like you're the Gestapo.

I had a "test pipe" installed in my '82 Z28. It replaced the catalytic converter, and made it feel like I had dropped headers onto the small-block Chevy. I had to sign a paper stating that the vehicle was only for off road use.

After a few years, the shop didn't want to pass me on emissions. "What's the big deal?" I said, "put the probe in another car's tail pipe."

"Sshh!," they said, "the walls have ears!"

[mrbill5491]

How?

Last I heard, they still have to pass emissions tests. Are you saying the small amount of surge that was considered normal can be completely eliminated on a stock 1100EZ?

How, exactly?

Emissions test? I don't need no stinking emissions test...guess that depends where one lives. At the time they had to pass the Federally mandated test before they could even ship them here. Once they got here and many riders would pop the idle mixture cover caps and reset them, among a few other changes. Just FYI, if one uses CARB certified aftermarket components (mostly 4 wheeled vehicles though, not sure there are many CARB approve pieces for bikes), there shouldn't be a problem with any emissions testing.

[tom203]

"....Air filter and air cleaner box lid were gone when I got the bike. Filter was replaced with a 4" round paper element. Original was a foam element"

I'm trying to visualize what your current filter setup looks like- is this paper element stuck on nose of airbox? if so, is it sealing decently- the CV's like a little restiction as revs climb.

[Big T]

That's my .02 also

Get the proper filter element and make up a duct tape lid

The CV carbs want the restriction, which increases air velocity and causes the slides to lift

[mrbill5491]

I learned that lesson real quick. I had just changed my oil, plugs and something else...Oh I just cleaned my K&N airfilter and was drying. Anyways, with the filter out and the air box lib off, I fired up the bike to circulate the new oil and check for leaks. I tweeted the throttle and it would not run past 5K rpms period and it would just bog down big time. So I'm sitting there saying what the hell? I stuck my palm into the airbox to restrict the flow some, it went past 5K in heart beat. Lesson learned, Gotta have the air filter and lid on the air box for these bikes to work right. Oh umm this was back in the mid 80s when I learned this lol.

[Old guy]

I think it's time to break down and buy a wideband. I hate carburetors, but I hate not having the correct tools even more.

http://wide-band.com/content/apsx-d1...splay-full-kit

Anyone in ohio down for some carb tuning?

[jbthomp]

Why don't you just do plug chops? That will tell you if you are rich or lean. You are not very likely to get it right by guessing that is for sure.

[Old guy]

Plug chops are still a guess.

I found a local yard with the lid and filter.

The kidney shaped port at the back of the carb is the vacuum source for the top of the diaphragm. At some point the low pressure moving through the throat of the carb needs help with an increased differential via the top of the diaphragm.

This is why I love fuel injection.

[Rob S.]

Just FYI, if one uses CARB certified aftermarket components (mostly 4 wheeled vehicles though, not sure there are many CARB approve pieces for bikes), there shouldn't be a problem with any emissions testing.

CARB must have something to do with bikes, as it was the subject of a Cycle World column a year or so ago (I think it was about aftermarket exhausts).

[chef1366]

I've jetted many bikes reading plugs.

[jbthomp]

Plug chops are still a guess.

Not really if you know what your looking for.

[Old guy]

Ok, ditched the air box. Figured if I'm going to be playing the jetting game, might as well run pods.... With a twist.

1 up on the pilot, 2 up on the main, engineered some pods, now it pulls to 8k, mid range is strong, surge is gone, and it sounds GREAT.

I've got some 130 mains, and 1 size down from where I'm at now. That will help me judge the right direction...... I'll be damned if it ends up running right on stock jetting. That would be one of those awesome, cheap, HP mods that other 650s could do. Maybe the 650 is just that different.

Pulled the snorkels out of there air box, pulled the inner retaining rings, picked up some foam material, put this foam to the entrance of the snorkel, pushed the ring in till it was flush, trimmed the foam with a razor, then seated the ring. $2 pods and velocity stacks.

I have pics I'll post.

[Old guy]