I was hoping to tap the collective knowledge of the DMF.  I'm trying to trace the history of front and rear axle sizes, caliper spacing and caliper types.  Thanks in advance.

Axles.  Modern monsters have a hollow 25mm axle (correct? Even for the S4RS?).  The chart below is from chromo2001 in this thread.  Can anyone confirm?

Monster wheel sizes
1993-1999 20mm front | 17mm rear
2000-2001 25mm front | 17mm rear
2002-current 25mm front | 25mm rear (for dual sized swingarms)

Brake Calipers.  Is correct?
Radial:  696, s4rs, s4rt
2 piston, 2 pad:  695, s2r800, '05 620. 
Goldlines (4 piston, 2 pad):  All other monsters, including 02-04 620s
Others:  ______ ?

Discs.  Correct?
Single front:   600 and pre-2000 750.  The '02 620 can be either a single disk or double.  Correct?
Double front disc:  all other monsters

Caliper Spacing. 
65mm:  all monsters 2000+ 
40mm:  all 1999 and prior monsters
Other spacing: ____???

Caliper Spacing. 
65mm:  all monsters 2000 on
40mm:  all 1999 and prior monsters
, I think.

Then we have the 300mm discs....

I would also say add "Front Fender" as they changed at the same time as the brakes did.

specifically

1993-1999 used the smaller 2 bolt "fixed" mount that's higher on the front of fork than the actual brake mount which is on the backside of the fork.

2000-2008 use the plastic clips which wrap around the lower fork legs and give the 2 fender mounts somewhere to clamp.

2008 /S4Rs uses the same fender mount as the 749/999 style. Meaning 1 bolt low in front of fork leg and 1 bolt behind fork leg between the brake mount and fork leg. (hope that makes sense)

Fender fitment. (in addition to the standard Monster fender)
1993-1999 Can use the SS's from 1992-1998, 851/888
2000-2008 Can use the 748/916/996/998, 1999-2008 SS & ST fenders
2008/S4Rs Can use the 749/999

all above are direct bolt on. But you can get creative and make adapter brackets and even fit fenders from other bikes depending on how "creative" you get.

'01 & '02 750 dual disc.

S4Rt with the Showas, it is a 25mm axle, but the 'large' end is much larger than all other 25mm axles.

I'm pretty sure all of the S4Rs and S4Rt are the 5-bolt rotors with the different offset.

No idea on what the offset/bolt pattern are for 696.

2 piston, 2 pad:  695, s2r800, '05 620.
300mm rotors go with the 2 piston, 2 pad calipers.

Calipers: I *think* all of the 65mm spacing are 2-pin pad retainers, and 40mm spacing are single-pin.

Rotors; I think all of the carriers with the round holes are steel, snowflake are aluminum, as are the straight-spoke ones.

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Edit: calipers on dyslexia corrected......

Calipers: I *think* all of the 40mm spacing are 2-pin pad retainers, and 65mm spacing are single-pin.

He really meant "I *think* all of the 40mm spacing are  single-pin retainers, and 65mm spacing are 2-pin retainers.


some of the early front axles may be 17mm as well, these were used on the early 851 and supersports so you may see a early (93/94) with the small front axle. Hey its all they had lying around.

Quote from: ducvet on September 08, 2008, 07:08:38 PM
Calipers: I *think* all of the 40mm spacing are 2-pin pad retainers, and 65mm spacing are single-pin.

He really meant "I *think* all of the 40mm spacing are  single-pin retainers, and 65mm spacing are 2-pin retainers.


some of the early front axles may be 17mm as well, these were used on the early 851 and supersports so you may see a early (93/94) with the small front axle. Hey its all they had lying around.

My 96 has a 17mm front axle.

Quote from: ducpainter on September 08, 2008, 07:19:21 PM
My 96 has a 17mm front axle.

I'm pretty sure my '97 has a 17mm front axle.  One end of the axle is actually bigger (maybe 20mm) than the part that fits through the wheel, but the actual axle is 17mm.

Quote from: ducvet on September 08, 2008, 07:08:38 PM
-----------------snip---------------
He really meant "I *think* all of the 40mm spacing are  single-pin retainers, and 65mm spacing are 2-pin retainers.

-----------------snip---------------

At least I got it *completely* backwards. 

Original post corrected...

Quote from: howie on September 08, 2008, 02:51:21 PM
'01 & '02 750 dual disc.

This is market specific - my Australian delivered '99 M750 has dual front discs (I'm 99% sure the same year US delivered 750's had single discs)

big

disc rotors:

4 piston are 320mm - goldline / radial

2 piston are 300mm -

QuoteCalipers: I *think* all of the 65mm spacing are 2-pin pad retainers, and 40mm spacing are single-pin.

Correct. 65mm-2pin, 40mm-1pin.