|Brand||Automotive Specialty Tools|
|Item model number||19-4074-100|
|Manufacturer Part Number||19-4074-100|
Colortune for 14mm Spark Plug
|Price:||$69.89 + $10.95 shipping|
- Enter your model number to make sure this fits.
- Adjust the idle mixture and determine the overall condition of your carb during actual use
- Simply screw the Colortune Engine Analyzer into one of the spark plug holes and you can see the color of the flame produced during combustion
- Includes detailed, full-color instructions, special viewer, cleaning brush and extension
- For use on Motorcycles and High Performance engines with 14mm thread spark plugs
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Top Customer Reviews
I bought a dynojet Stage 1 Jet Kit, which added fuel to the mid and upper range and improved performance dramatically. But the idle was still awful, and it still took forever to warm up enough to actually ride.
I tried messing with the idle adjust screws on the carbs but couldn't really tell what was going on. I turned all of the pilot screws a turn out, to richen it a bit, but it didn't really seem to help. I also synced the carbs, which helped the bike, but didn't help the 'cold blooded' nature of it.
Enter the Colortune. I did my tuning at night in the dark, it was easy to see the combustion process at night in my driveway, even with the lights on in my garage. I would not attempt to do it in sunlight, you won't see anything.
I started with cylinder 1, after the bike fully warmed up, and saw blue combustion; as I expected (it's lean). I turned the pilot screw out with the bike running; and was shocked that it stayed blue after 3 full turns! Finally, at around 4 turns, everything turned orange and the bike started to bog a bit. You should note that the color in the glass tends to be leaner than the color in the cylinder; on these old engines, fuel doesn't distribute as evenly as a new fuel injected bike. So try to look down in and see the color at the spark itself. Look past the occasional lean, blue flash up in the plug itself, and you can see exactly what's going on in the cylinder.Read more ›
Most Recent Customer Reviews
Should be manufactured in two different thread lengths. It is what would be considered the "short" thread length (short reach) version of a spark plug. Read morePublished 19 months ago by wesley crook
SU carbs can be a hassle setting the proper fuel ratio this helped me over come this obstacle for my TF MGPublished on June 1, 2014 by Andrew Abraham