"Lurker's Night" Lurker's with Problems- Let's Hear fm YOU!

I devoting tonight to try and help those who don't regularly contribute for one reason or another.

Don't wait for a problem similar to yours to be discussed.

Let's discuss exactly what your problem is and what we can do about it!

I'm also going to be on A-I-M until 10PM Eastern.

Then, I'm leaving class and makin' it a BlockBuster Night!

Let's fix your bike first!

Rick Massey

 

I have to let the kid's have the computer ... I'll be back and hope to find some new issues to deal with.

 

Rick, you're awesome and your uncanny ability to be omnipresent on these boards shows a lot of love for these old bikes along with a wealth of knowledge. Although we only interacted once on these forums and it was mostly me looking for some parts, you have been able to encourage me to try to fix some of the faulty parts i was looking for and i was able to salvage an emulsion tube purchase. Thans for the all around great tips. If you're ever in the Omaha Nebraska area , I'll buy beer!. Cheers mate. Keep up the great work.

 

I'm convinced that if Yamaha brought-back the 750 Max and Seca, de-bugged and sporting a nice Fuel Injection system ... they'd sell every last one of them and more than a few would be right in our garages.

But, Marketing says to follow Harley. Go BIG. Bigger.

I think being an XJ-Person is a great past time. Once you get the skill to Clean and Tune the Carbs on your own bike; there's no holding back.

I get a kick out the PM's I get from all-over ... people trying something they previously paid for and getting it done better than farming the work out.

We've sure helped a few over the fence; that's for sure. Well, good for them! I hope everybody having a nice ride for getting their bike all fixed-up by checkin'-in here are enjoying themselves.

There are great folks, some exceptionally talented, that have shown-off their work in the past year.

Now, if we could just come-up with a precise formula that would work for everybody who does Intake Pods and Exhaust Mod's ... that would be great!

 

Re: "Lurker's Night" Lurker's with Problems- Let's Hear fm

haha, a post for the lurkers. Well Rick - I'm the one that waits for someone else to post a question like mine, so as not to bother anyone!

The amount of knowledge about these bikes on this forum makes it very accessible to work on my bike!

I don't have a problem right now - but for your sake, when I do, I'll post it instead of waste 3 hours on google looking for an answer. Guess it's the curse of us DIY - I want to even find the answer myself! Arg, sometimes I could bash my head against a wall!

editor's note: Way! too many exclamations! in that post! I'm really not *that* excitable, honest!

 

Ask away.

If we can do something to get you smoothed-out ... go for it.
That's the Mission.

Getting you able to really enjoy throwing a leg over that bike and having it fire right-up and go good is JOB ONE.

 

Hey Rick,

Here's my idea for a formula for intake/exaust mods. I have no idea if it would work, but what do you think?

So, say someone ups the intake airflow. First, if possible, determine the increase of airflow. If this is possible, the increase the pilot jet by the same percentage. If this is impossible, then get a variety of pilot jets and colour tune to proper blue. Determine the percentage of increase and apply the incrase to the rest of fuel meter jets.

While I write this, I realize that things might be a little more complicated than this, esepcially for those with Hitatchi carbs. But it might work as a generaly rule of thumb--something to get folks in the ballpark.

Just rambling, so don't take this too seriously.

 

I think its more complicated than this ...

Otherwise; there'd be one -- already!

 

Rick:

Yes, but has anyone tried it? What I realized is that one would have to take into account the air jet for the piston, at least for the 550's.

You need to preserve the fuel/air ratio. I'm no expert on carbs by no means. But there ought to be a way to think it through, such that, one can preserve the ratio. My idea was merely that by finding that ratio on the pilot circuit, one could then apply that increase/decrease to the rest of the circuits.

You may well have understood what I was saying the first time, but I reread my post and realized that it wasn't that clear.

But yeah, it's complicated. I've acquired a real appreciation for carb technology since I've owned my bike. It's mighty sophisiticated.

 

In Theory ... It's Brilliant!

In Practice ... Nobody would use it.

Going after a Mixture Issue takes time and patience.
Generally, you don't make more than One Change at a time ... otherwise, you get some Result that you might like ... But, don't know what it was that you did to get the results.

Main Jets and Needle Heights are a Prime Example.

If you do them BOTH and get close ... you don't know if it was the Jetting or the Needle Height that got you there.

You usually JET and get the Fuel Close ... then, "Play" with the Needle Height to get close to what you are looking for.

 

Re: "Lurker's Night" Lurker's with Problems- Let's Hear fm

I always thought it would be nifty to make a tool that incorporates an oxygen sensor with a gauge... come to think of it, it shouldn't be so hard to do. all you'd need is an O2 sensor from a car, 12V power supply, and a "choked" voltmeter... maybe some kind of "clamp-on-to-exhaust-pipe" adapter dealie...

after all, that's how fuel-injected systems determine the proper fuel mixture...

one could take an exhaust reading with known-good mixture, then alter the intake/exhaust to his heart's content, then, based on the readings, decide how far to go on jet sizes. this way you don't have to guess.

does this sound too Wile E. Coyote?