Colortune Plug

Hellooo again.
Got a question about aquiring a Colortune plug. I cant seem to find any one Ebay or Craigslist. Only Adapters for a Gunson Model.
What size should I get, 14mm?
And where can I aquire one?
-SLKid

 

It's 12mm for the X, so I think it is 14mm for the airhead. I picked up mine off of ebay.

http://cgi.ebay.com/ebaymotors/Gunson-1 ... 246wt_1224

 

chacal carries them. Gunson is the manufacturer.

 

+1 re: chacal Got mine from him - perfect.

 

+1 Chacal will fix you up.

 

+1 Chacal, I got mine just this past Monday!

 

Ok, another question.
I know this has been asked a few times, but I keep finding different answers.
When I color tune, or check my plugs (havent bought a colortune yet) and a plug is Lean, on the white side, do I turn my Pilots CW or CCW??
I'm gettin mixed answers when I search.
Help?
-SLK

 

In or CW is more closed = less gas = leaner.

So if you are lean you wnat more gas = more open = CCW or Out

Hope that helps.

 

Yeah, immensely actually. I've heard the Vis Versa way more than I've heard "the truth"
Thanks a million bill
-DCA

 

Just move your mixture screws alittle at a time and then go out and ride. Check the plugs when you get back and only move the screw about a width of a dime at one time. If you go more you can over shoot where you want to be. Write down your settings so if you mess up you can always go back to your baseline.

MN

 

Excellent point - Rick says degrees of adjustment. it is that fussy.

 

What range of throttle settings do the mixture screws adjust?

Do they only adjust at idle only or from idle to full throttle?

Thanks.
Jim

 

Idle and transition from Idle to rolling open. I have been struggling with this myself. There is no off so the jet contributes all the time but becomes trivial compared to the main at higher RPMs.

It does provide some degree of supplemental richness and can effect the coloration seen in plug chops.

 

what is this colortune plug you guys keep talking about? i have never seen one nor have i had to use one

 

http://www.etoolcart.com/gunson-colortu ... 4-100.aspx

 

It's a device that takes the place of a spark plug and has a clear "window" in it that allows you to actually SEE the color of the combustion as it occurs and tune accordingly. It takes the place of the use of an EGA for individually tuning the mixtures on multiple-carb engines.

http://www.gunson.co.uk/tools.aspx?cat=673

Neat toy. Everybody needs one.

 

So when you colortune you want to roll the throttle a bit? Pick it up to like 1500 RPMS then start gauging the color?

 

Yes, just a slightly higher idle helps smooth out the color, and if everything is way off you will be adjusting the idle a few times.

I got my colortune a year ago from Chacal. I've used it on my 750 and 900 and I can't seem to find the exact right color with it, so I rely on multiple plug reads and incremental adjustments to get me "home".
Would the 10% alcohol in the gas change the color?

46 MPG with the 750 ! It was doing as low as 32 MPG at first.

 

We tryed using the colortune yesterday and I don't think it works right. The bike was running just fine and we put it in #1 plug hole and fired the bike back up and you could see it firing but the bike was missing on that cylinder. Then you could hear it popping in the exhaust. Whats up with that? Also unlike a regular spark plug the electrode is way inside the colortune plug. It can't possibly fire right when your regular spark plug has the tip in the combustion chamber can it????????

MN

Maybe we are missing something here or is it possible we got a bad Colortune Plug.

 

Huh.. Thats wierd MN... I wonder if it'll do the same on mine when I order her.. Hope not.. Did you talk to Chacal?

 

It SHOULD work OK. I suspect: A bad connection between the colortune, its wire extender, and the plug wire somewhere; the extender wire or plug boot were touching somewhere grounding the spark; possibly a "soggy" battery not producing a nice fat spark below 2K rpm?

 

We tryed it on two bikes and it did the same thing. I know the charging systems and batterys are in tip top shape and there was no problem with the connections. Put it in and it would miss one that cylinder on both bikes. Kyrrinstock is going to try it on his bike and see if he can get it to work. If we can't get it working I'm going to PM Len and see what he says.

MN

Fitz look at yours and tell us how far up the tube your electrode is. I think maybe ours is up there too far so it can't ignite the air/fuel mix in the cylinder right. The electrode on ours is almost a 1/2" up inside there.

 

The side electrode is exactly where the threads end, but before the washer "land". Colortunes will lower the compression ratio of that cylinder a little. It has a volume of 1.3 CC's and a sparkplug measures .2 CC's

 

I went to try it on mine, but found that it's the wrong size. I checked Chacal's catalog and sure enough, the 550 engines use the other size.

 

He says: Send It Back!!

I've never had a bad one, but there's always at least one rotten apple int he bunch, right? We'll swap it out no problem. But again, try it outside of the engine and see what happens?

The electrode is recessed way up inside on all of them.