Kart Setup and Session Sheet
Tie every kart setup change to the lap time it produced, so a day at the track ends with a known best setup rather than a feeling about one.
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Garage and vehicle workshop · GV-41
Carburettor Tuning and Jetting Record
A free printable carburettor tuning record: settings as found, then every jetting change one at a time, with the conditions and how it ran at each throttle opening.
Download Free · no sign-up
2 pages. Choose your paper size — both versions are laid out identically, so neither one gets shrunk to fit.
Print it and write on it
Fill it in type and save
The fillable versions have real form fields — open them in any PDF reader, type into them and save. Printing help.
What this sheet is for
Know which carburettor setting worked best, and get back to it when something changes. One change per line, with the conditions, shows what each change actually did.
Who it is for
Motorcycle, kart, classic car and small engine owners and tuners who set up their own carburettors.
How to use it
- Write the engine and carburettor details, then the settings exactly as you found them.
- Make one change at a time and write a line with the conditions and the change, from and to.
- Ride or run it and note how it ran at each throttle opening, and the plug colour if you read it.
- Copy the best setting into the Best known row whenever it improves.
What is on the sheet
2 pages, in this order:
Page 1
Printed under the title: Every jetting change and adjustment, one at a time, with the conditions and how the engine ran at each throttle opening, so the best setting is known and can be found again.
One change at a time. No jet sizes, clip positions or screw settings are printed: start from the carburettor or engine maker's baseline and change one thing at a time. Count clip positions from the top of the needle and screw turns out from lightly seated, the same way every time.
Write-on lines: Engine or vehicle · Carb make and model · Size · No. of carbs · Fuel, and oil mix if two-stroke · Air filter and exhaust fitted · Spark plug
Settings — as found, the maker's baseline, and the best found so far
Also printed: Setting · Main jet · Pilot jet · Needle · Clip · Needle jet · Screw · Float · Slide · type · from top · turns out · height · cutaway · As found · Maker's baseline · Best known
Changes and results — result at each opening: R rich, L lean, OK, or a word
Also printed: Conditions · The one change · How it ran
Table, 25 rows: Date · Temp · Altitude · Humidity · Setting · From · To · Idle · ¼ · ½ · ¾ · Full · Plug · Keep?
Page 2
Ruled lines: What made the difference, and anything to try next time
Questions
Why are no jet sizes or clip positions printed?
They depend on the carburettor, the engine, its exhaust and air filter, and where it runs. Start from the maker's baseline, write it in, and let your own results show what the engine wants.
Why only one change per line?
If two things change at once you cannot tell which one made the difference. A line per change, with the weather beside it, is what lets you find the best setting again.
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