XJ750 Seca shaft drive question

Hi guys,

I just purchased a 1982 Seca 750 with 15000 miles the other day and got it running today. The bike's in real nice shape, always garaged and all stock.

I've searched but I can't find anything on lubing the shaft drive splines. Plenty of threads on what type of gear oil to use but I'm wondering if the splines should be checked often and what type of grease to use for them. I remember hearing horror stories about people stripping the splines on older Vulcan 750s due to them not being greased up properly and would like to avoid this with my Seca.

Thanks,
A

 

Honda Synthetic front wheel drive grease with Moly.

Heck, anything would be better than nasty 28 year old grease.

 

It's not something I've ever seen come up here. It is a common issue on the larger Yamaha shaft drive bikes. I think that the XJ splines are either beefy enough that they continue to work when worn or that XJs typically don't get the miles the touring bikes do.

The service manual calls for molybdenum disulphide grease. Word is that Yamaha recommends the Honda branded Moly 60 (which is what I think Time is talking about). It's quite pricey. I've also bought moly grease at Harbor Freight and I assume the auto parts stores have it too. Supposedly the Honda stuff has way more molybdenum disulphide in it.

There is an oil seal where the drive shaft goes into the coupler at the final drive. There is a very good chance you'll ruin it taking the shaft out. You might want to have a new one (part number 93108-23007-00) on hand when you start.

You should also lube the other end of the drive shaft (where it goes into the U-joint) with moly grease. It's also what the service manual calls for on the splines to the rear wheel.

That little cartridge of Honda Moly 60 is enough to do the job several times.

 

Thank you very much! That's exactly the type of information I was looking for.

Good to know about that seal as well. I'll probably be doing this soon since it's winter.

Thanks again, guys.

 

AND you really should get your hands on a service manual before you tear into it.