1985 Maxim-X 750 Recommission - Putting it back together

Re: 1985 Maxim-X 750 Recommision - carb assembly

Thanks! The diaphragms are fine and I was able to get the needles cleaned off without having to soak everything. The slides seem a bit varnished but I'll see if they still slide fine before worrying about it. I saw somewhere on here where someone suggested sanding/polishing them with some high grit wet/dry paper which I could do. (I think I have up to 3k grit for restoring/polishing straight razors)

 

Re: 1985 Maxim-X 750 Recommision - carb assembly

Putting the floats back in the bowls and I'm wondering if the PO installed new floats but didn't adjust them at all. The tangs on all 4 are perfectly flat and way out of spec. I'm actually having a tough time getting the first one bent to where it should be. With the carb upside down, the shop manual says to bend the tang (no easy task, they are very stiff) so that the top of the floats ate 17.5mm from the mating surface without gasket. They are sitting at around 19mm or so.

I'm tempted to go straight to measuring the fuel level in the bowls to see how far off they actually are using the tube in the drain hole.

 

Re: 1985 Maxim-X 750 Recommision - carb assembly

Make sure you are bending the correct tang! It should not be very stiff at all.

The float "down stop" arm is quite stiff, but it never gets bent.

See page 5 and 8:

http://www.xj4ever.com/setting%20fuel%20levels.pdf

 

Re: 1985 Maxim-X 750 Recommision - carb assembly

The middle bit that the float needle hooks onto, yes? That's the one I was trying to bend and it was quite difficult, like to the point where I was worried I would start bending and twisting the whole float.

 

Re: 1985 Maxim-X 750 Recommision - carb assembly

They are easy to bend... Hold the float and press with a flat screwdriver, keep in mind that a TINY bend makes a big change in measurement ...

 

Re: 1985 Maxim-X 750 Recommision - carb assembly

That's what I thought, but it is not bending easy and curls up instead of bending nice.

 

Re: 1985 Maxim-X 750 Recommision - carb assembly

Then pull the pivot shaft and use needle nose pliers

 

Re: 1985 Maxim-X 750 Recommision - carb assembly

Double-checking --- you haven't put the floats in upside down, have you?!?!?

 

Re: 1985 Maxim-X 750 Recommision - carb assembly

Tried that as well, that's how I got the end to curl up. Not enough room to grab the whole length. I'll try it some more but was curious if what I was experiencing was normal.

 

Re: 1985 Maxim-X 750 Recommision - carb assembly

Over the last couple weeks I cleaned the fuel tank, cleaned and rebuilt the petcock and cleaned the fuel level sender.

Today I checked the fuel level in the carb bowl using the hose tool attached to the drain and it checks out in spec, so that's good.

After wrestling the carbs back onto the bike, tightened the clamps on the manifold... Go to start getting the air cleaner boots on and there's something missing... one of the drain hoses from the carbs. That's odd, it was there a minute ago. Search around and find that it on the ground, the T junction broken off... Not very impressed with myself. I was so hoping to see if it would start, but now it looks like I'll need to order a part and remove/reinstall the damn carbs again.

Oh well...

By the way, where do the 2 drain hoses from the carbs go? They were disconnected and the bike partially disassembled when I acquired it.

 

I've got a wiring question. I don't think the stock controls (for run, off, start) are what is on the bike as the plugs do not match. I am wondering if the 2 red/white wires coming off it are unique in any way? I want to change the plug to match the bike but am wondering if I can just match up either red/white wire with the other side or if they are somehow unique. I've looked at the wiring diagram but can't make any sense of it.

 

I just got the bike back from the local bike mechanic this week. Last summer I had done the valve spacing, carbs, battery, spark plugs, and fuel tank. The engine would run but would leak fuel everywhere. I took it to the local shop a few weeks back and now it runs great! He put new tires, did the brakes, brake lines, syncd and tuned the carbs, and generally went over the whole bike making sure it was good to go on the road.

I am so pumped to finally be riding this thing. It's a blast!



Got a question now tho, what should the RPMs be at in 5th going around 60mph? It seems high to me but I'm used to cars. It's around 4500 rpm.

 

That sounds about right. 65 MPH is seen at 5,000 RPM. You're right in the midrange of the engine and can run like that all day long.

 

Learn to enjoy the sound of it whining like that.... It's supposed to--- and YOU'RE supposed to

 

Oh I enjoyed it, just wanted to make sure it was normal. I've only had out up to 6k, easing into it. Lol.

 

6k.... You're juuuust starting to get into the powerband. Once it comes in, you're gonna feel " the X factor"

 

Yah I figured I was about 1k from the real bike. It's my first bike and my third day riding, figured I'd take my time. Heh

 

DO more than ease into it. Get thee to a beginning rider's course. There is a huge skillset required of a motorcyclist if you want to remain an uninjured/non-deceased motorcyclist for long. You might also benefit from getting a copy of David Hough's excellent street skills book, "Proficient Motorcycling."

 

^ +1 on Hough's book and the beginner's class . . . .just do it!

Bought it three years ago and usually finding myself re-reading it every winter waiting for spring.

 

Thanks for the tip, I'll check out that book for sure. Unfortunately there's no course locally but there it's one a couple hours down the road.

edit: Just ordered that book, thanks for the tip!