One idea at a time in focus mode
Fuel grade, the oil-pump behaviour already sourced, and the premix ratio this site will not invent.
Before you start
Your own risk. Wrong jetting or timing can seize the engine. This is information, not advice.
How many steps: 2
Step 1 of 2
Fuel is unleaded, 95 RON minimum, from the manual.
Haynes: unleaded, minimum 95 RON. Tank 13.0 litres, of which reserve is 3.5 litres. A higher octane, and any claim that it is required after a head skim, is To verify.
Step 2 of 2
The oil pump is a range, not one premix ratio.
Licence, MOT, insurance or a seizure.
Hartrusion quotes handbook ranges of about 0.9% to 2% on the older Rotax 123 and 1% to 3% on the Rotax 122, varying with rpm and throttle. The pumps are stamped 08 on the 123 and 33 on the 122, and they are not interchangeable. About one stroke every 50 crank revolutions, and at idle a small shot about every 3 to 5 seconds. Bleed at the small screw until the oil has no air. MCN’s grade note is a premium two-stroke oil. A specification code is not published. The cable setting after the pump has been apart is To verify. A premix ratio for a bike whose pump has been removed is not in these sources. 50:1 and 33:1 are not figures from the handbooks quoted above. A ratio is To verify. Do not remove the pump because a forum remembered a different marque.
This guide is done. Your place stays on this device.
Haynes: unleaded, minimum 95 RON. Tank 13.0 litres, of which reserve is 3.5 litres. A higher octane, and any claim that it is required after a head skim, is To verify.
Source: Haynes manual 4298
Hartrusion quotes handbook ranges of about 0.9% to 2% on the older Rotax 123 and 1% to 3% on the Rotax 122, varying with rpm and throttle. The pumps are stamped 08 on the 123 and 33 on the 122, and they are not interchangeable. About one stroke every 50 crank revolutions, and at idle a small shot about every 3 to 5 seconds. Bleed at the small screw until the oil has no air.
MCN’s grade note is a premium two-stroke oil. A specification code is not published. The cable setting after the pump has been apart is To verify.
A premix ratio for a bike whose pump has been removed is not in these sources. 50:1 and 33:1 are not figures from the handbooks quoted above. A ratio is To verify. Do not remove the pump because a forum remembered a different marque.
Legal and safety. Too little oil seizes the engine. Too much fouls the plug and can wash the bore. The pump ranges are not a permission to guess a bottle ratio.
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