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jk3099 · August 9th, 2023, 07:21 PM

Hi all,

It's been a while! I started troubleshooting my bike again. A few findings...

1. I took the carbs. off to look at the rubber boots and took pictures included in the link below. They didn't seem to have any obvious cracks, though there was some deformity in the rubber. Is there a chance this is the culprit for the low vacuum on the carbs? I also verified that there were no obstructions in the spaces connecting the engine/airbox to the carbs.
https://photos.app.goo.gl/BrBkFx6AtDdZ2TH59

2. I began readjusting the valves. The left intake was too tight (from my last valve adjustment), so I adjusted it to the appropriate clearance. The right intake was fine. I'm working on the left exhaust, which seemed just barely loose, so I'm trying to tighten it up a bit. I still have to check the right exhaust.

3. From looking at the video of the low vacuum, does anyone have any other ideas of what I might want to check other than the valves and passages to the carbs?
https://www.youtube.com/shorts/l_biVnh7M6w

4. The air filter isn't terribly dirty, though I did find a hazelnut at the bottom of the airbox. No changes at the moment.

Thanks for everyone's help!

August 9th, 2023, 07:21 PM	#46
jk3099 ninjette.org member Name: Joe Location: SE MN Join Date: Jan 2023 Motorcycle(s): 2006 Kawasaki Ninja 250 Posts: 30	Hi all, It's been a while! I started troubleshooting my bike again. A few findings... 1. I took the carbs. off to look at the rubber boots and took pictures included in the link below. They didn't seem to have any obvious cracks, though there was some deformity in the rubber. Is there a chance this is the culprit for the low vacuum on the carbs? I also verified that there were no obstructions in the spaces connecting the engine/airbox to the carbs. https://photos.app.goo.gl/BrBkFx6AtDdZ2TH59 2. I began readjusting the valves. The left intake was too tight (from my last valve adjustment), so I adjusted it to the appropriate clearance. The right intake was fine. I'm working on the left exhaust, which seemed just barely loose, so I'm trying to tighten it up a bit. I still have to check the right exhaust. 3. From looking at the video of the low vacuum, does anyone have any other ideas of what I might want to check other than the valves and passages to the carbs? https://www.youtube.com/shorts/l_biVnh7M6w 4. The air filter isn't terribly dirty, though I did find a hazelnut at the bottom of the airbox. No changes at the moment. Thanks for everyone's help!