XJ 750 seca/maxim inner fork tubes

Merry Christmas to all!

I hope you all bought your XJs presents this year. I'm buying mine fork seals, to be installed on Christmas Eve.

My question is regarding XJ 750 seca/maxim inner fork tubes. Does anyone know if they're interchangeable? I know they're definitely both 36mm tubes. The problem is I have a parts bike Maxim 750 and a parts bike Seca 750. Each has a chip on just one of its inner fork tubes. I've read the forums on repairs that could be made to them and I've decided not to risk it. I wonder, can I just swap the bad inner fork tube on the Seca with the good one on the Maxim? Keep in mind that I'm in Canada so my Seca model is the XJ750RJC. I believe the Maxim 750 is the same as the American model.

Cheers,

Aaron.

 

This is a "chacal" question. Send him a PM if he doesn't jump in. I think* the tubes are different between the bikes with anti-dive and those without; do they both have anti-dive?


*I could be completely wrong. the fiche is misbehaving for me plus you have Canadian-spec bikes.

 

Hey man,
Thanks for jumping in. The Seca has anti-drive and the Maxim has adjustable air shocks, the type with four options on the top dial. If Chachal doesn't know I'll let everyone know over the weekend.
Merry Christmas!
Aaron.

(Unrelated, your 550s are mint. I just picked up my first XJ 550 for cheap recently. Getting into that over Christmas. It runs but it runs hot and it's gutless. I'm hoping that the new intake manifolds and air filter I picked up will solve the problem. The intakes were cracked to pieces. If not, I'm going to start posting to troubleshoot. I'm stoked because it only has 15,000 km.)

 

RE: 550s: Adjust the valves first thing, then check compression. Hopefully the poor thing doesn't have a holed piston (or two.) The 550 is bulletproof if properly maintained; it tends to be more succeptible to damage from neglect however, because it's a bit more "high strung."

 

Re: forks

XJ750RJC and XJ750J inner fork tubes are not interchangeable. I ended up replacing the seals and filling the dent in the dent with epoxy. If it doesn't hold up I'll replace it.

Re: 550

Fitz,

Good call on the shims. The ones I bought are for my XJ750. Will they fit the 550? FYI, I got my manifolds in. While I was in there I checked all the spark plugs and all look good with 10 miles on them. I also looked at the old plugs I pulled out awhile ago. They look good too. Forgot my keys so I couldn't try them out. Nuts!

 

Hi all,

So back in December put the forks onto the XJ750 and assumed they were good to go. I moved onto electronics and cosmetics. Today in February it idled on its own so I celebrated with a wee glass of scotch. I jumped on and tested the brakes and shocks and noticed a suspension issue.

Pardon my lack of terminology, but the forks sound... springy. I can hear the spring inside one or both of them. They hold air but they feel spongy. I am certain I filled them with the proper amount of 10w30 motor oil (257cc's.) These are off a Maxim 750 J, with no anti-drive, mounted onto an XJ750 triple tree and frame.

Any ideas?

Thank you,

Aaron.

P.s. The advice I get from this site is invaluable and I recently made a donation. I think it was $20 or $40, which is a pittance considering how much I have learned since I joined in 2008. If you learn something from this post, please consider tossing a few bucks to the good folks who keep this site running.

 

Anyone have any ideas? My springs sound too springy as per above.

 

You should use FORK oil, not MOTOR oil. You should hear the swoosh of the shocks, but not rattling springs.

I thought the "C" designated California bikes?

Never heard of C for Canadian bikes.

 

This problem solved itself today when I rode it around the block once and topped up the air again. It has held all afternoon. Onto the next issue.

Thanks KRSR14. The C indicates red tank, red decals, and a factory oil cooler in the 650 version. I imagine it's the same for the 750 in Canada.

I appreciate what you're saying about fork oil but my Haynes manual says motor oil is OK to substitute. I don't doubt that fork oil is superior but I've been running motor oil for years in forks with no issues.

Ciao,

Apato.