carb sync tool

[LoopGaroo]

I just received my new CarbTune in the mail yesterday. We'll see; if I can figure it out, anyone can.

[duaneage]

I believe they are M4 1.25 thread.

[Steve]

Speaking of....does anyone know what size threading is used for the sync adapters or nipples?
Do all the bikes use the same size nipples/threading?

I believe they are M4 1.25 thread.

They are not M4, they are M5 0.8 thread.

No, all bikes do not use the same, Kawasaki, for one, uses M6 adapters.

By the way, I got the "permanent" adapters from Z1 for my bike, thinking it would make the job easier. Well, it does make they sync job easier, but my bike is not yet perfectly tuned, and will hiccup occasionally while warming up. One of those hiccups spit off the rubber cap on the adapter, and I rode to work that day with a SERIOUS air leak and did not realize it. I shudder to think what could have happened if it had been an all-day ride, instead of 3 miles to work.

I tried some different rubber caps (tighter fitting), but ended up removing the adapters and going back to stock.

.

[Good Times]

I understand the carbtune. What does the colortune do?

[btbarb]

Both tools

I understand the carbtune. What does the colortune do?

I just recently got the carbtune and colortune. To some degree I'm glad I hacked on carb tuning and air/fuel mixtures without these tools for a six months - oh my - what a difference with the tools, it takes all the guess work out.

The colortune is actually my favorite, it's a clear spark plug that shows you the combustion flame, it's a visual way to tell if your air/fuel mixture is right. Blue is good, blueish-orange is rich, and blueish-white is lean. My plug readings were ok and my performance was decent, but fine tuning with the colortune and sync'ng with the carbtune made a noticeable difference in smoothness and off idle low rpm transitions.

There's no substitute for experience, but if you don't have that, buy a carbtune and a colortune.

[Suzuki_Don]

They are not M4, they are M5 0.8 thread.

No, all bikes do not use the same, Kawasaki, for one, uses M6 adapters.

By the way, I got the "permanent" adapters from Z1 for my bike, thinking it would make the job easier. Well, it does make they sync job easier, but my bike is not yet perfectly tuned, and will hiccup occasionally while warming up. One of those hiccups spit off the rubber cap on the adapter, and I rode to work that day with a SERIOUS air leak and did not realize it. I shudder to think what could have happened if it had been an all-day ride, instead of 3 miles to work.

I tried some different rubber caps (tighter fitting), but ended up removing the adapters and going back to stock.

.

I like Steve fitted the vacuum attachments to the intake boots, but I have had no trouble with the rubber caps splitting and I have had mine on for over a 1000 miles. And it makes it so easy to check the synch. About 10 mins max. Don't even have to remove the tank, just the four rubber caps, push the rubber tubes on and start the bike and check the readings. If everything's reading ok, remove the tubes and replace the caps. If adjustments are needed then follow the Suzuki manual procedure, remove tank, etc.




.

[Suzuki_Don]

I got a Carbtune Pro, the carb tool (the long screwdriver with the socket on the outside), and a Colortune for Christmas.

Only used the Carbtune Pro with the carb tool once so far but made the sync dead simple.

Yet to use the Colortune although I need to desperately...

Pete is your Carbtune Pro the 4-cyl one.

[Guest]

Pete is your Carbtune Pro the 4-cyl one.

Yep Don, the house mate did the smart thing and got me that one just in case I got a 4 cylinder one of these days...

[Suzuki_Don]

Yep Don, the house mate did the smart thing and got me that one just in case I got a 4 cylinder one of these days...

Or you could do two twins at the same time.haha

[Good Times]

I just recently got the carbtune and colortune. To some degree I'm glad I hacked on carb tuning and air/fuel mixtures without these tools for a six months - oh my - what a difference with the tools, it takes all the guess work out.

The colortune is actually my favorite, it's a clear spark plug that shows you the combustion flame, it's a visual way to tell if your air/fuel mixture is right. Blue is good, blueish-orange is rich, and blueish-white is lean. My plug readings were ok and my performance was decent, but fine tuning with the colortune and sync'ng with the carbtune made a noticeable difference in smoothness and off idle low rpm transitions.

There's no substitute for experience, but if you don't have that, buy a carbtune and a colortune.

I'll be buying a carbtune and colortune.

[Steve]

I'll be buying a carbtune and colortune.

I had the pleasure of using a Colortune a couple of years ago. First bike I checked was Simon's '77 750 with VM carbs. Saw that color change ever so nicely, I was impressed. Took it home, used it on my wife's '82 850 with CV carbs, never saw the color change. The flame sputtered, then went out, but the color never changed. Tried one more bike with CV carbs, same thing. I adjusted the screw to the leanest point where I had steady flame.

My summary? If you have the older VM carbs, the Colortune is GREAT.
If you have the newer CV carbs, the enthusiasm is a bit less.

.

[TheCafeKid]

I have merc sticks too. I likes em.

[chedd]

i use a set of (4) vacuum gauges on my gs750,they cost?120and are real easy to use and are just about unbreakable.the colourtune sounds like a good buy!i recon i'll invest in one.

[1_v8_merc]

Thanks for the info and pics guys.

The problem is actually my carb-tool stems(that screw into the boots), the outside ones are too long, and they nudge against the motor too much for comfort. Maybe I'll just cut 'em down a few inches.

[Guest]

Or you could do two twins at the same time.haha

Hahaha true Don! Fella at work has a 500, we could share maintenance time!