- Joined
- Oct 28, 2014
- Messages
- 1,873
It seems odd there is no mention of dellorto carburetors on a Norton.
The Colourtune would need the engine running at a constant revs to give a reading.I have no way to double check the AFR gauge. It recalibrates each time I use it. Some trust is involved.
I was thinking about also using a Color tune but I have a question. If you have one perhaps you have the answers.
Jim Comstock recommends an AFR between 12.3 and 12.5. I will accept his recommendations.
It has been difficult to get easy to read instructions for the colortune but the desired color is bunsen blue which is 14.7.
12.5 would give me the yellow-orange color.
**Which color should I go for? Which one do you use? I would like to use the color tune up to 3500. Would the color change under load? Obviously the bike must be stationary .
Stick with the afrI have no way to double check the AFR gauge. It recalibrates each time I use it. Some trust is involved.
I was thinking about also using a Color tune but I have a question. If you have one perhaps you have the answers.
Jim Comstock recommends an AFR between 12.3 and 12.5. I will accept his recommendations.
It has been difficult to get easy to read instructions for the colortune but the desired color is bunsen blue which is 14.7.
12.5 would give me the yellow-orange color.
**Which color should I go for? Which one do you use? I would like to use the color tune up to 3500. Would the color change under load? Obviously the bike must be stationary .
You pays your money and make your choices.....Stick with the afr
It's light years away from a colour tune
For me it's not about the moneyYou pays your money and make your choices.....
A little used Colortune on flea bay is about £25.
The cheapest AFR is about £45, but if you have 2 exhaust pipes you need a least 2 senders, both welded into somewhere .....so........
Sorry, but this smacks of a shortcut.You only need to weld one in one down pipe
Just make sure you adjust both carbs the same etc
As long as the engine is in good fettle ,carb wear,valve clearance, compression etc then YES it's a huge shortcutSorry, but this smacks of a shortcut.
You cannot make assumptions here, each cylinder might NOT be getting the same ingition advance, or the best jetting for optimum performance!!!
It's just possible that one carb will require a bigger main jet than the other.........
Yep that's what I used to say until I bought a colour tuneHaven't needed one so far.......
A mate of mine uses an afr gauge on all his bikesThe one I have is a Spartan 2 wide band, dual Bosch sensor with a dual read out gauge (for each cylinder)
The recommendation with it was the sensor/s two feet from the exhaust port (it has temperature LEDs though)
John F doing the round the world on a Commando posted his AFR settings and they were rich compared to anything modern.
For oldies there are all manner of modern things worth exploring (but not necessarily purchase) and an AFR was worth it to me even if it takes effort to install.
The threaded fittings are only $10 a pop so not even worth machining yourself.
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I have a colour tune somewhere, I read the other day they want to fly to the moon and one day telephones will have no cord.
Sure they will.