No airbox

JayStreetfighter04 · December 20th, 2023, 08:37 PM

Just got a decent deal on a running bike. It runs but bogs down when quickly throttling. While looking around the bike I realized there is no airbox and the air filters are directly connected to the carb with black tape around them. Is this the first thing I should replace or do I need to look elsewhere? super noob here so please be gentle.

jkv45 · December 21st, 2023, 07:34 AM

Welcome!

Yes - you are on the right track.

Most will agree that the engine runs best with an original airbox.

In addition, it's very possible you may need to remove and clean the carbs, which requires some patience and research to do it properly the first time.

You can try installing an airbox and doing some basic tuning of the idle mixture screws, then test riding to see if the carbs need attention.

The carb type on the Ninja, a Constant Velocity (CV), doesn't like to be whacked-open quickly. They work much better with a smooth roll-on of the throttle, even when properly tuned.

Make sure the fuel is fresh, and you have a good fully charged battery, before doing any testing.

December 20th, 2023, 08:37 PM	#1
JayStreetfighter04 ninjette.org newbie Name: Jeremy Location: 1513 Hotiyee Ave Join Date: Dec 2023 Motorcycle(s): 04 ninja 250 Posts: 7	No airbox Just got a decent deal on a running bike. It runs but bogs down when quickly throttling. While looking around the bike I realized there is no airbox and the air filters are directly connected to the carb with black tape around them. Is this the first thing I should replace or do I need to look elsewhere? super noob here so please be gentle.

December 21st, 2023, 07:34 AM	#2
jkv45 Rev Limiter Name: Jay Location: WI Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot. MOTM - Jun '18, Oct '16	Welcome! Yes - you are on the right track. Most will agree that the engine runs best with an original airbox. In addition, it's very possible you may need to remove and clean the carbs, which requires some patience and research to do it properly the first time. You can try installing an airbox and doing some basic tuning of the idle mixture screws, then test riding to see if the carbs need attention. The carb type on the Ninja, a Constant Velocity (CV), doesn't like to be whacked-open quickly. They work much better with a smooth roll-on of the throttle, even when properly tuned. Make sure the fuel is fresh, and you have a good fully charged battery, before doing any testing.
	2 out of 2 members found this post helpful.

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