xj650 discs & mc fit xj750?

Would 650 brake discs and master cylinder fit a 750? mc capacity same from single to dual discs? Handle bars same dia.?

Also, would xj1100 front wheel w/discs interchange with a 750? And would an xj1100 rear wheel work on a 750? That is if the xj1100 disc can be replaced with a 750 drum.

I understand Maxim wheels are the same size, 16" rear and 19" front. Does the rim width change between a 550, 650, 750, & 1100?

 

I can only answer your first question...well part of it.

The MC from a 650 doesn't have the capacity to squeeze the dual disc setup, UNLESS the MC is from a 650 Seca, which has dual discs.

The handlebars on the 750 and the 650 are both 7/8"

 

To answer more Q's -
Let's all assume you have a 750 Maxim
You can't expect anything from the 550 or 1100 series bikes to work, with few exceptions.
Even the 750 Seca and 750 Maxim had different brake parts.
You cannot interchange a drum for a disc (without entering the "modification" room.)

You absolutely need the right parts.
You will need to be patient and watch E-Bay, or source NEW parts from Chacal at XJ4Ever at the top of the screen.
Or post in the "buy-sell" forum. We won't steer you wrong !!

 

While the 650, and 750 Maxim use the same wheel. The 650 uses a different diameter brake disc. You could bolt the 650 disc to the 750 wheel, but you would then have to use the 650 lower fork also for proper location of the brake caliper.

The 650 being a single disc system may not have the same capacity master cylinder. Some 650's did come with the larger capacity master cylinder. The lower capacity master cylinders are identified by the sight glass that is held in by a small c-clip. The higher capacity master cylinders have a glued in sight glass.

On the handle bars.
Basicly all the XJ series bikes use the 7/8" diameter handle bars. Just differences in styling, length, width. The 82 750 Maxim uses an adjustable modular handle bar.

On the 1100 wheels.
While the wheel, and brake disc may bolt to the forks of the 750. You are once again looking at a different brake caliper mounting, and would have to use the 1100 lower forks for proper brake operation.

The 1100 rear uses a disc brake, and does not have the molded in brake drum, and can only be used in a rear disc application.

As far as wheel widths.
No they are not universal. the 650 uses a 2.85" wide wheel. The 750 uses a 3.00" wheel.

What are you trying to accomplish?

Ghost

 

I once had a 550 Maxim in the 80's, and I still like the Maxim style. Recently bought an '82 750 Maxim that didn't have wheels or brakes, it came with a "parts bike", which was a 650 Maxim. It's good to know the rim width is different, but most importantly it will not work if simply bolting on some 750 (or 1100) discs onto a 650 wheel. I'll look for 750 rims...or reconsider the expense involved. The bike has a title, but I may be tempted to part it out...it all hinges on if I can get it running. I'd like to restore it, repaint the frame, and the tank, and perform lots of TLC with this "winter project". However, I may end up selling it next spring since I already have a dependable bike to ride.

 

For the record, Chacal just sent me some info which helps clarify how the 650 & 750 wheels differ:

FRONT wheel: are exactly the same on XJ650 all models (except the XJ650 Turbo models) and all the XJ750 Maxim/Seca models (1.85 x 19")...exactly the same. The XJ650 Maxim models had a plastic "block-off" plate attached on the right side of the center hub, to "pretty up" that side due to the lack of the right side rotor, but it just pries out of position and the right side 750 Maxim rotor will bolt right on.

REAR wheel: the XJ650 Maxim rear wheel is 3.00 x 16", and the XJ750 Maxim rear wheel is also 3.00 x 16", so from a design and size-only perspective, yes, they will interchange. HOWEVER, the XJ650 rear wheel uses a smaller drum brake shoe size, and thus the rear drum (integral to the wheel hub) is SMALLER than the one used on the XJ750 Maxim models............something that you really don't want to "downgrade" (the drum and brake\shoe size) for your XJ750.

 

so, can you bolt another 650/750 disc and caliper onto a 650 fork?

 

Nope. Different style calipers have different mounting points, and the 650 Maxim fork only has provision for mounting a caliper on one side.

 

darn. I just looked at my fork. some more braking power would be nice. I went with some new Vesrah pads. anyone done ss lines?