Which XJ750?

Hi everyone, noob here... Just bought my first bike and I've been riding it for a week. 82 xj750... Awesome! I've been doing as much research as I can since I bought it, finding forums like this one to seek out problems and solutions ahead of time. One thing I haven't been able to figure out, though, is the series! X, J, K, RH, Seca??? I imagine I should be able to tell by the VIN. Can someone please clue me in here? She's air cooled if that helps.

You know what, I might as well get all my questions out at once instead of starting 10 different topics. OK, maybe a couple, lol.

1.) The series.

2.) Fork seal replacement. I see the seals are cheap, and I've ordered my Haynes manual (yeah, I know the service manual from Yamaha is better, but for $80 plus shipping I'll suck it up with the Haynes!) How intense is their replacement? Labor hours?

3.) Reving down to idle after she's hot. What's the deal? After she's good and warm from a little interstate driving, she doesn't like to rev back down and hangs around 3K for a while. I hope it's not a compression problem. There's NO power loss that I can tell, but then again this is my first bike and I'm pretty ginger on the throttle.

I think that's it for now. Sorry for the dissertation, and I appreciate any and all help! Safe riding!

 

First welcome to the XJ Forum, and Second, kick back and relax as the help coasts in =)

 

The slow-down to (Idle) revs when she's hot could be a few things.
Sync
Pilot Mixtures ... or,
Diaphragm Pistons sticking.

Diaphragm Pistons sticking is a old-age issue.
The Bores that the "Slides" rise and fall in get aluma-oxidized.
A dull gray haze of tarnish forms on the surface.
It has to be removed.

Search the forums for a piece I wrote called "Clunk Test"
I have a feeling you'll benefit greatly from reading that article.

 

Post the as much of the VIN as you are comfortable with. The first 3 or 4 digits/letters should get us the needed info. A photo would be helpful too.

See above.

Don't fret, Chacal stocks most factory manuals for about half the price. Drop by the For Sale/Wanted Forum, you'll find him. The job is not hard unless you have rusted/frozen parts. You should spring for the factory seals (also available from Chacal) as they tend to last a lot longer than aftermarket units. You can swap a set of seals in about an hour if you are well equipped and know what goes where. Figure a few more hours if you are mechanically savy but haven't done it before.

You need to check your plugs. Pull them and look at the color of the insulator. Is it tan or black? My gut feeling is that you are running rich and the idle floats on the rich mixture but I will leave that diagnosis for the real geniuses around here.
Welcome to the wonderful world of XJ!

 

Yes, he does.

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lm2) Original reprinted FACTORY SERVICE MANUALS are also available. These full-size manuals covers all aspects of diagnosis, repair, and assembly for specific model bikes. These brand new, official Yamaha manuals are one of those "must-have" tools if you're going to be wrenching on your own bike. Plenty of photographs, diagrams, flowcharts, wiring charts (some of them even being correct!), torque values, etc. NOTE: cover design, color, and appearance may differ from originals.

HCP1152 Factory Service Manual covers all XJ750 Maxim models 1982.
$ 59.00

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Wow! Thanks alot guys! I think I found the right forum. I've read alot of great things about the maxim, which is why I jumped at the chance to buy this one. My dad had one back in the day, it might even still be in storage in Texas. Thanks for answering my questions. On a side note, is anyone in to full size offroad, like jeeps and trucks?

 

Here's some of the VIN: JYA15R005CA. I'd post a pic, but I'm not sure how on this forum. She's air cooled and has a square headlight with a small square spotlight under it.

 

15R is listed as a 1982 XJ750J USA model

 

He's got an uncanny way of finding you.
But, you could use the Personal Message feature and contact him directly.

 

So Axle, you've got an 82 XJ750J Maxim. Nice bikes. If your old man still has another stashed away, you might want to get your mitts on it, they are a great commuter bike!