96 M900 Forks

[joshn569]

replacing the fork seals and was wondering how much oil and what weight is recommended? im apx 165 lbs. SHOWA FORKS

also internals came flying out when i pulled them apart and was wondering if anybody had a exploded view of the showa forks.... not exactly 100% sure where the piece in red came from.

[ducpainter]

That piece is the retainer for the spring. It goes at the top of the damper rod in the groove just below the top cap.

I don't know how much oil.

[printman]

Haynes      457 cc   from empty    or 79.5 mm level      Showa s.s8 oil   or somewhere between 10-20  I would lean to the 10 side  on good fork oil

[M900]

Did you buy OEM, and if so do you have the part number for the Duc seals?

There's an ebay Duc parts sales guy that's local to me and I'm looking at picking up what I need to fix a leaky oil seal on my 96 M900.

[joshn569]

yea oem parts, I will post the part numbers tomorrow when I get out of work. I didnt get the bushings tho, mine are in ok shape so im not going to worry about them, but i did get the oil seals dust seals and the clip that hold them in and the crush washer for the bottom bolt.

[joshn569]

93010021A - Oil Seals
34910581A - Dust Seals
88410051A - Snap Rings
34910761A - Crush Rings

You need 2 of everything. ( if your doing both forks that is....)

Again, you should do the bushings too, I dont have the part numbers for those.

[M900]

93010021A - Oil Seals
34910581A - Dust Seals
88410051A - Snap Rings
34910761A - Crush Rings

You need 2 of everything. ( if your doing both forks that is....)

Again, you should do the bushings too, I dont have the part numbers for those.

thanks.  I think my "oil leak" was just crap that dribbled down the fork after a long ride, but I'm keeping this info -- just a matter of time before I have to rebuild the forks.

[avizpls]

While you're there......


Race Tech Gold Valves and linear rate springs. Must. must. must.

description	qty	unit	Race Tech part number	unit price	price
Type-1 compression valve	1	set (L/R)	FMGV S2043	169.99	169.99
Type-1 rebound valve	1	set (L/R)	FRGV-S02	169.99	169.99
Spring set 34.7x340mm .85kg	1	set (L/R)	FRSP S3534085	109.99	109.99
Shock oil 3.5-5wt	2	quart	US-1	29.99	59.98
Inner fork bushing	1	set (L/R)	FMBI 41201 P	24.99	24.99
outter fork bushing	1	set (L/R)	FMBO 41202 P	21.98	21.98
SHOWA oil seal	1	set (L/R)	FSOS 41P	21.98	21.98
SHOW dust seal	1	set (L/R)	FSDS 41P	19.98	19.98
			TOTAL	598.88

also...it was kind of a pain in the ass to get that table formatted correctly....I hope someone finds it useful. Maybe getting the SHOWA parts from racetech is cheaper than ducati dealer? Genuine Showa parts

[brad black]

you don't need to pull the cartridges out to do seals, makes it much simpler.  the red circled piece is what you take off to get the spring, etc, out.

i use 5 weight in the showas to take the edge off the high speed compression damping.  i'd run them about 90mm, altho there was a bulletin early on saying to raise it 30mm from spec, which would make it 50 or 60mm ish.  was to help with full compression harshness i think.  best to respring it while it's apart with linear springs.

bmw rear drive too.  you poor bastard.

[joshn569]

bmw rear drive too.  you poor bastard.

LOL, I take it you have had to rebuild and re-shim a few BMW rear drives before.

While you're there......


Race Tech Gold Valves and linear rate springs. Must. must. must.

description	qty	unit	Race Tech part number	unit price	price
Type-1 compression valve	1	set (L/R)	FMGV S2043	169.99	169.99
Type-1 rebound valve	1	set (L/R)	FRGV-S02	169.99	169.99
Spring set 34.7x340mm .85kg	1	set (L/R)	FRSP S3534085	109.99	109.99
Shock oil 3.5-5wt	2	quart	US-1	29.99	59.98
Inner fork bushing	1	set (L/R)	FMBI 41201 P	24.99	24.99
outter fork bushing	1	set (L/R)	FMBO 41202 P	21.98	21.98
SHOWA oil seal	1	set (L/R)	FSOS 41P	21.98	21.98
SHOW dust seal	1	set (L/R)	FSDS 41P	19.98	19.98
			TOTAL	598.88

also...it was kind of a pain in the ass to get that table formatted correctly....I hope someone finds it useful. Maybe getting the SHOWA parts from racetech is cheaper than ducati dealer? Genuine Showa parts

Good stuff, thanks for all the info