Today is not my day...more issues

blueboy5000 · 04-28-2014, 04:53 PM

1) make sure throttle is adjusted correctly. you shouldn't have much play in the throttle cable. You adjust this by using the two nuts on the throttle-cable housing attached to the carb,

2) turn up the idle. The bike should idle around 2000-2200 rpms when cold started, and should drop to 1800 or so after 5 minutes. But right now you just want a fast idle so you can adjust the bike's carb. The idle screw is the screw with a spring on it right that makes contact with the throttle cable.

3) if you have not done so, seat the mixture screw and tun it counter-clockwise (left) 2 and 1/2 turns.

4) let bike run 10 minutes. After bike has remained running for ten minutes, turn mixture crew 1/4 turn to left. wait five seconds, listen for RPM increase. Repeat until rpms do not rise. turn CLOCKWISE 1/2 turn EXACTLY. This is a SLIGHTLY RICH mixture. This is where your mixture should be for optimum performance.

5) set idle using idle screw to 1800 rpms.

04-28-2014, 04:53 PM	#14
blueboy5000 Join Date: Jul 2011 Location: Connecticut Posts: 493	1) make sure throttle is adjusted correctly. you shouldn't have much play in the throttle cable. You adjust this by using the two nuts on the throttle-cable housing attached to the carb, 2) turn up the idle. The bike should idle around 2000-2200 rpms when cold started, and should drop to 1800 or so after 5 minutes. But right now you just want a fast idle so you can adjust the bike's carb. The idle screw is the screw with a spring on it right that makes contact with the throttle cable. 3) if you have not done so, seat the mixture screw and tun it counter-clockwise (left) 2 and 1/2 turns. 4) let bike run 10 minutes. After bike has remained running for ten minutes, turn mixture crew 1/4 turn to left. wait five seconds, listen for RPM increase. Repeat until rpms do not rise. turn CLOCKWISE 1/2 turn EXACTLY. This is a SLIGHTLY RICH mixture. This is where your mixture should be for optimum performance. 5) set idle using idle screw to 1800 rpms. __________________ 2011 Roketa MC-23-150 4T 150cc 157 qmj 24mm carb w 115 main jet and paper cone air filter Manual petcock w Tygon fuel lines Scrappy Dog Scooters Retro-slash stainless straight-thru exhaust RED spring clutch Adjustable CDI (brand unknown, it's blue and red and works great!) KOSO high performance variator w 12g sliders Gates Powerlink 835-20-30 belt GPS verified 65mph on flats.
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