What is needed to put a 1981 XJ750 Seca engine into a 1983 XJ750 Maxim?

The starter clutch is out on my '83 Maxim. Instead of changing the clutch, I was thinking about just putting in a different engine. I found one that is fairly local and has about 20k miles. I think the frame mounts are different between the engines. What else is different?

I plan to use the exhaust, carbs, carb boots, and my starter from the 83 on the 81.
Thank you, Joe

 

the engine case with the shifter is different. They can be transferred from Maxim to Seca or vice versa.

 

the information overload thread covers motor swaps

The Information Overload Hour

 

Honestly it is not real difficult to split the case and replace rollers and springs in the starter clutch. The only special tool required is some torx bits , a 30mm socket for the clutch nut . I used a pallet which makes it easy to keep from marring case . The parts needed clutch cover gasket, side cover gasket, starter clutch repair kit , oil pan gasket, tube of Yamabond, red /blue locktite .Possibly the chain guide , I did two of these now first one took me 8 days. Second three see my thread the dreaded starter clutch , I have pictures of the inside of the engine.

 

Before you goto doing all of that work, make sure that the starter motor isn't in need of service, and that the battery is up to snuff, and that you are using the correct type of oil.

Load test the battery.

Replacing your starter motor brushes w/ pics

A handy guide to not rebuilding your slipping starter clutch.

Choosing Oil for a Wet Clutch Motorcycle

 

K-moe,
I should have mentioned that I have replaced the starter with a new OEM unit. The battery is a month old and I also replaced the starter solenoid since it had corrosion. I have tried Yamalube 10w-40, did the seafoam treatment and now and running Maxima 10w-30 synthetic motorycle oil. The starter clutch has gotten better but its a real pain to start when hot. When its cold, the clutch engages just fine.

 

I might have to give it a try then. I have plenty of tools and mechanical knowledge. I've put a new timing chain set in my '93 Z/28 last year and it has been running fine.
Where at in Indiana are you? I grew up in Bremen and now live near Bloomington.

 

I'm from Plainfield, but live in northern Indiana. Hey noticed your reply to Kmoe synthetic oil seems to be the starter clutch killer , I recommend Shell 15/40 diesel oil . If you did a timing chain , you can do this task. It takes about an hour to pull the engine , and slightly longer to reinstall ...it will take less repairing your engine than modifying a different engine , and this raises another issue , the engine you want to swap could have a week starter clutch as well .

 

I'll give another oil a shot. The Shell oil is probably about $20 so its no big loss if it doesn't work.

 

If you decide to replace the starter clutch , you can IM me I will try to answer any questions. I know one of my engines the starter clutch would slip if engine was hot . I bought another engine was good for two years and it started to slip even cold . I have fixed both engines now so I have a spare engine now . When you get starter clutch out and see how simple it is after 30 plus years , the springs get weak , and rollers can be galled .

 

Thanks for the offer to help. I'm thinking this will be a winter project.