that is pretty cool, never seen one. Kind of works the same idea a bit differently. alter the fuel/air mix to tune but this way you get an actual visual real time aid vs. look at plug color after a certain RPM rev up. Kinda neat!

Interesting video especialy the Datsun one. Is it better than listening by ear?

Not a H1,nice bike, but you'll get the idea:

https://www.youtube.com/watch?v=yt6m35akQrA

Don’t know what the colortune device is but it reminds me of doing “plug chops” on my old H1 triple trying to balance the carbs and get the proper color of plug burn, then change it and do em again! Ah the good ole days

Sounds very methodical, mechanical and filled with analog beauty
ah the good old days!!!

When it was first developed in the early 70's there was a method for selecting carb jets etc. The driving wheels would be removed, the car secured on stands, the accelerator floored and the brakes applied to pull the revs down to 2k, 3k 4k etc for a colour reading. Usually it was necessary to let the brakes cool between readings.

innovate motorsports LM series just read the meter and manually tune it to read 14:1 then it won't be too rich for road use though maybe still tune it to 12:1 at full throttle

Ah the good old days are gone where seat of the pants, sound, frequencies, exhaust smell and checking plugs was an art form for tuning by those refined for cars analog sensing humans.

I miss the old guys that could tune anything without a laptop or techno gadget.

I use innovate motorsports LM series and datalogging useful as for road use dyno tuning is just a starting point as it often ends up too rich for road use and there is nothing like tuning for real world useage

For you old-school guys here's one for sale $90 opening bid
http://buyee.jp/item/yahoo/auction/p702080989?lang=en

COLORTUNE is a special British-made structure, direct visual while carburetor and engine flame of the combustion chamber of the engine during start-up it is a tool that allows the adjustment

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  Gunson's Colortune kit.jpg (73.74 KB)


  Gunson's Colortune.jpg (97.32 KB)


  Gunson's Colortune attachments.jpg (67.08 KB)


  Gunson's twin carb sychro.jpg (105.33 KB)


  Twin carb sychro.jpg (61.66 KB)


  Fuel system fault diagnosis chart.jpg (84.85 KB)


  case.jpg (45.98 KB)