Advice on XJ750 Maxim restoration

Hey y'all,
I got an '82 Maxim in pretty good condition a few months ago and just got it running. I have taken down the carbs, cleaned them, got a new battery, changed the oil, did the brakes/brake fluid, the works. But when I get it turned over and give a little throttle and close it again, the RPMs ramp back up from idle to 4k rpm once or twice before settling back down. I am thinking it may just need to be synced because the carbs looked awesome when I took the bowls off. (It was stored in a garage with some other collector item cars) Also, when I shift into first and go to let the clutch out, the engine dies. Any advice? I have checked over everything and its not my first rodeo restoring but I was hoping to narrow down the issues before syncing my carbs.

 

Welcome to the forum, also, congrats on the bike.

We need to know a little info about you. Not to sure how many yrs of riding experience you have and all that. With being said, need to know how the bike is dying? Does it die as soon as you put the bike in gear with the clutch still in? If so this would suggest that one of the safety swx is bad, I would bet on the kick stand swx.

If the bike still runs after you put the bike in gear, does a very small lung or no lung at all and stays running while full clutch is pulled in, that is good. If you have clutch handle in all the way and then as you put it in gear it gives a big lung and then dies, the clutch needs to be adjusted.

If the bike is still running while in gear, and you have the clutch fully pulled in, as you slowly release the clutch than it does, you have to give it more gas. Without getting too much into it, this is called the "friction zone".

 

I have been around motorcycles since I was 4 because of my family, but actual riding years about 3-4 years. Usually I'm helping my dad or uncle restore some bikes but this is my solo venture since moving out.

As for the bike issue, it stays running after shifting into gear with minimal lunge, and slowly letting the clutch out while giving a bit of throttle doesn't keep it from dying. Would this still be a kickstand swx issue? The bike was in the previous owner's garage since about 2017 without being touched..

 

Sounds like the kickstand switch could be it. Could you link out the clutch switch to check the bike pulls away properly?
Otherwise my usual suggestion is to stop guessing, get a multimeter and test the relevant points on the loom (with the help of a workshop manual diagram).
Welcome by the way, the XJ maxim is a nice compact feeling bike for the engine size.

 

Thank you for the tip! And yes its a great bike, I can't wait to put her back on the road.