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RacinNinja · September 17th, 2021, 03:56 PM

Shouldn't be more than a minute on the choke. Our race Ninja's spend about 1 minute on the choke, reducing how far the choke is open as time passes to keep revs around 3000 RPM. If we leave the choke fully open, they'll hit 4K+ RPM as they warm up. So ya, that's normal. That's why the lever is adjustable!

If you need more choke, that means things are lean. As previously stated, dirty carbs, not jetted correctly or tight valves. Valve adjustments suck though, shim under bucket on post gen. Miss the pre-gen valves that had actual adjusters. :/

If the main jets were plugged, odds are good the passageways still have varnish in them. Time for a strip and dip and a good round of air blasting. Spray carb cleaner is rather useless.......

September 17th, 2021, 03:56 PM	#4
RacinNinja Vintage Screwball Name: B Location: Washington Join Date: Feb 2016 Motorcycle(s): 2011 Ninja 250, 2008 Ninja 250, 2019 KTM 1290SDR, 2017 FZ10 Posts: A lot. MOTM - Mar '16	Shouldn't be more than a minute on the choke. Our race Ninja's spend about 1 minute on the choke, reducing how far the choke is open as time passes to keep revs around 3000 RPM. If we leave the choke fully open, they'll hit 4K+ RPM as they warm up. So ya, that's normal. That's why the lever is adjustable! If you need more choke, that means things are lean. As previously stated, dirty carbs, not jetted correctly or tight valves. Valve adjustments suck though, shim under bucket on post gen. Miss the pre-gen valves that had actual adjusters. :/ If the main jets were plugged, odds are good the passageways still have varnish in them. Time for a strip and dip and a good round of air blasting. Spray carb cleaner is rather useless....... __________________________________________________ Goin' fast on slow bikes!