03 zx12r clutch wont disengage

main jet blocked and clutch damage maybe bent clutch push rod or plates seized together

Hello,

Have you checked to see if the clutch lever is working properly? If the clutch stays engaged, the bike won't move. You can lubricate the clutch cable by removing it and taping a cardboard cone to the housing and pour a lightweight (30w) motor oil into the cone. Next, move the cable back and forth for a minute or so so that the oil will flow down inside the cable.

If the clutch cable is working correctly then then clutch plates are not disengaging when put into gear. Try different gears to see if it does the same thing. Also, have you changed the oil in the bike? Your bike uses a wet clutch system which means that the oil you put in the crankcase is also used for your clutch plates. Using a synthetic oil will cause problems with your bike (according to Honda).

Hopefully this will give you a few more ideas to try. If you need more information, please post a reply/comment and I will get back with you.

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Regards,

Oz

clutch is either adjusted wrong or it time to replace it sounds like its not disengaging

Sounds like your charging system is not charging the battery.

Put a volt meter on the battery, run the engine up to maybe 2,000 RPM. The voltage must be at least 13.8V, but not more than 14.5.

If that is all OK, your battery is worn out, and is not holding sufficient reserve. It would need to be replaced.

Did you winterize the gas before putting it up for the season last year?

Without power to the clutch and trans alot of bikes will not disengage. Only when running

Hello,

Your clutch is maybe malfunctionning.
Check if your clutch cable is tight enough.

Bleed your slave cylinder on the sprocket cover and refill the hydraulic fluid. If you have any leaks you will get air in the system and it will not fully disengage the clutch. As for the 750, they have cable clutches and you just need to adjust the slack of the cable.