Thoughts?

You don't have to pull it apart to check the oil level. Just remove the fill plug and look. The gear oil should be nearly level with the bottom of the hole.
My only concern is that the oil seal may be weeping, causing the buildup that you see on the output shaft. It could also be the remains of an over-application of grease.

 

Right I know about checking the gear oil that's no biggie changing the tire was the first time I've had the back tire off I was talking about pulling it apart to make the buildup on the output shaft disappear

What's the easiest way to tell what's what? Ya know grease or a slight weep of oil?

 

Tires: I saw this: http://www.foreven.com/motorcycles/Tyres/YaSeca55.htm
A buddy of mine also loves the Avon Roadrunners. Runs them on his Triumph.

 

I'm taking it the chart would be the same with a 16" rear rim instead of the 18

 

That chart is very out of date. There are many more tire choices now than when that chart was created. Not all tires are available in all wheel diameters. I'd look at motorcycle-usa or revzilla. They both have a fairly comprehensive system for looking up what tires are available for your wheels, but it is limited to what they carry.

As for the buildup. It wouldn't hurt to pull the wheel and clean it up, but I'd wait until after checking the seal for weeping. The way to tell if it's a weeping seal or not is to ride the bike for a good while, then pull the wheel and check for oil on the shaft.

 

How long is a good while? We talking hours or days?

 

If it's weeping you should see oil on the output shaft within 20 minutes or so.

 

No leaks

 

What does this control?

 

That is the throttle shaft that the butterfly valve is attached to. The butterfly valve is part of the system that controls how much gas/air makes it into the engine.

If you were testing for air leaks and found one there, it is your throttle shaft seal that is leaking. You will need to take the carbs apart fully to replace them all, but you might be able to get just that one by removing the circlip thing and plastic washer.

 

He was looking for leaks at the final drive.

 

I like the pics they are always helpful

One bad seal could make the bike run crappy?

 

Yes. A vacuum leak anywhere will cause a lean condition, and that means crappy running. High or hanging idle; eventual holes in pistons if it's lean enough.

 

It's running rich tho plugs 1 2 & 4 smell of gas and are sooty I was just looking at that piece in the carb it looks wet on the outside and that's what caught my attention

What's this little deal about?

 

That is a vacuum port (I think it might technically be called something else, at least in the Haynes manual). You use those when syncing your carbs. Normally, all but the port on #2 are blocked off, with the #2 port having a tube running from it to the petcock (if you still have have the stock vacuum petcock, some people replace it with a manual one that doesn't use vacuum).

 

Haynes calls it the inlet stub.

 

those things are cheap, cut loose. get a new see thru fuel filter while your there

 

My bike has a metal purolator filter. What's brand on the see thru filter?

 

I've already got it see through fuel filter

My inlet subs are dry rotting tho glad to know they are just blocked off and not used for something other than syncing

 

Does the manual petcock eliminate the vacuum and/ or how does it affect the bike?

 

The manual petcock does not need the vacuum line and the port on the carb boot can be blocked off like the rest.
The standard petcock simply activates the fuel flow when the bike is running which means you don't have to manually turn it on and off. There is no other difference affecting the bike.

 

Definitely leaving it stock then

If manual petcock was left with fuel on would it really hurt anything? I know I used to leave petcock open on my 4 wheeler all the time

 

It SHOULDN'T hurt anything, but that is dependent upon whether or not your floats and pin are doing their job. It would be like leaving your current petcock on prime.

 

I changed to a Manuel petcock. I've gotten into the habit of turning it on and off but I have forgotten to turn it off (and on) a few times. Hasn't hurt anything by not turning it off but you learn pretty quickly when you forget to turn it on! Lol

 

I prefer the Jose petcocks, personally, but to each their own!

My Honda has a manual petcock, and I have had the same problem when going to start the bike, wondering how you ran out of gas, ha ha.

 

Dang spell check! Lol

 

Fuel filter, not oil.

 

Alright cool thanks for the info my next question on the stock petcock if it's turned to on I can unhook the hoses and it shouldn't leak correct?

 

Yes, that's what I'm talking about! I can provide a photo.

 

That's right (assuming it's not in need of a re-build).

 

Mine is all good I believe

Whats a reasonable price for a 750 tank? The tank does not come with a lid. I found one and I'd like to get for my 650 the dude wants $80 I haven't seen it yet so condition is really unknown at the moment ill be getting pictures later I can post

 

If it's dent and rust-free $80 is a good price anymore.

 

So it took a little while longer than I thought to get pictures
He said inside has minimal rust but here is the outside

 

If I buy a 550 maxim 4 to 1 exhaust will it bolt up to my 650 maxim?

 

No.

 

The headers are wrong?

 

Nothing about the 550 exhaust will fit onto a 650, except perhaps the gaskets.

 

Shoot for real I found a good one for 70$ I was hoping to get since mine is crap and there ain't no way to make it work huh man I figured they was about the same

 

I'm looking to get a mini tach/ speedo all in one and seen something about ratio for tach what ratio works for the 650j ?
Also is it possible to go digital with speedo?

 

I think you should look into some new caps. The tape on those is suspicious. If they are cracked and leaking, the bike will not run properly (air/vacuum leak).

 

I'm looking into a little bit of everything right now the bike is just parked in my shop my plans are to rebuild and take carbs to church adjust valves sync up pressure test replace what's bad as well as get rid of the stock wiring (going with the minimal) safteys headlight gauges all new front brake system it's really a project I haven't riddin it in a while just working on it probably take the rest of summer and winter I'm really in no rush anymore
Right now I'm waiting to get the service manual I've got the Haynes but not enough details or pictures lol it's helped some here and there tho

 

Does the 750 motor mount right up on 650 frame?

 

Yes, so long as it's from the same submodel. Maxims are rubber mounted and Secas are solid mounted. A cross-submodel swap can be done, but it requires some fiddling with the motor mounts.

More details on engine swaps can be found here: The Information Overload Hour

 

Thanks it's the same sub just a regular ole maxim

I have the opportunity to buy two 82 maxim 750s for $200 one has title one doesn't one is in pieces the other isn't so much but needs carbs I'm not sure if the air boxes are there or not

Any pointers on things to pay attention to that would turn away someone that is more educated on these bikes than me ?? I won't be able to start either one of them

 

At that price you just buy them and worry about any details later...........

 

That's kinda what I was thinking but wasn't for sure thanks my mind is made up now this will be number 3 and 4

 

+1.

Gary H.

 

It's a done deal I bought both bikes the only thing I really noticed that was missing was one of the air boxes and the bowls to one set of the carbs I will know more when I get them back to my shop and start going thru the boxes of parts I'll get some pictures up when I can might have some parts for sale

 

Also I've'm gonna be going to the salvage yard here this week or next supposedly they have a huge selection of xjs and other Japanese bikes if anyone is in need I can make a list and see what's available

 

Cool. Let me know if they really do have a good selection, and if they aren't asking outrageous prices ( I think I know which yard you're going to ).