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Discussion Starter · #1 ·
I’m thinking of putting the SCR’s floating front disc on my SR400. The disc dimensions are equivalent: 5mm thickness, 300mm OD, 6-bolt pattern and no flange offset.

However, the OEM brake pad part numbers I found online are not the same: SCR950 5S7-W0045-00-00 and SR400 4TR-W0045-00-00. Being overanxious perhaps I suspect there may be some subtle difference I’m overlooking. Perhaps Eddie can chime in with his shop experience as to the wisdom of this mod :confused:
 

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I’m thinking of putting the SCR’s floating front disc on my SR400. The disc dimensions are equivalent: 5mm thickness, 300mm OD, 6-bolt pattern and no flange offset.

However, the OEM brake pad part numbers I found online are not the same: SCR950 5S7-W0045-00-00 and SR400 4TR-W0045-00-00. Being overanxious perhaps I suspect there may be some subtle difference I’m overlooking. Perhaps Eddie can chime in with his shop experience as to the wisdom of this mod :confused:
I looked high and low to find a set of SR400 pads in the aftermarket world and discovered Ferodo FDB781 pads fit it AND the SCR950(!). Hurray! The Yamaha part # difference may be due to a different pad compound being used. I know the Super Tenere I have came with metallic front pads and organic rear pads. I changed everything out for EBC sintered metallic.

Oh! The FDB781 can be had with a HH rating (ST code in Ferodo-speak). = strong brakes.

Me? I'd swap out the pads first and see how well they work before changing rotors. All things being equal, it'd be nearly impossible to tell a difference between the SCR and SR rotors. Other than the SCR looking cooler with the waved edge, that is. =)
 

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Discussion Starter · #4 ·
Hey, thanks Eddie. You’re right, the part numbers may reflect different pad compounds as both bikes are single front disc but the SCR needs more stopping power, being some 160 lbs heavier. Maybe it uses the same pads as your Super Tenere?

I want to use the SCR disc as it is floating and therefore I assume self aligning, unlike the SR400’s rigid disc that already has a slight runout creating a periodic scuff-scuff sound coming to a stop. At least the theory behind floating discs is they are more resistant to heat warpage. I don’t expect any difference in braking effort.

If changing over discs I need to be careful the loctited bolts don’t mess up the aluminum threads in the hub. Maybe a pre-soak in acetone will help as I’m not going use a torch to heat the area. I expect new mounting bolts will come with pre-applied thread locker?
 

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Hey, thanks Eddie. You’re right, the part numbers may reflect different pad compounds as both bikes are single front disc but the SCR needs more stopping power, being some 160 lbs heavier. Maybe it uses the same pads as your Super Tenere?

I want to use the SCR disc as it is floating and therefore I assume self aligning, unlike the SR400’s rigid disc that already has a slight runout creating a periodic scuff-scuff sound coming to a stop. At least the theory behind floating discs is they are more resistant to heat warpage. I don’t expect any difference in braking effort.

If changing over discs I need to be careful the loctited bolts don’t mess up the aluminum threads in the hub. Maybe a pre-soak in acetone will help as I’m not going use a torch to heat the area. I expect new mounting bolts will come with pre-applied thread locker?
I'm with you on the factory's pad compound choice for their respective application. But, why not put the "good" pads on both bikes? The organic ones may be slightly more expensive and if the organics slow the 400 down okay, they might be doing it to save a few $/yen per unit. Things like that do add up with volume production. =)

I've changed out a few rotors, not too many, and the bolts are indeed held with locking agent of some sort. That said, once broken free with a bit of muscle on a good hex bit & breaker bar, they spun right out with a 3/8" air gun with no problem.
Maybe have a friend hold the SR's brake lever firmly and loosen the rotor bolts on the bike? Someone has to hold the wheel.
Why not let the bike itself do it? =)
Keep us posted!

Oh! EBC's FA179V is a another good metallic pad for the SCR/SC front. $33.20 from Dennis Kirk. Regular FA179s are Kevlar and a bit kinder to rotors. I had a set on a Transalp that lasted like 25,000 miles.
 

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Probably can't edit posts after a while so people can't delete vital info later on in spite. I've seen it happen to a forum a long time ago and it was a mess.

On the bright side, motor pads aren't exactly the most expensive part to replace on your own and there's plenty of options out there.
 

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Speaking of brake pads; has anyone looked into pads with different materials like ceramic composite brake pads? I've heard that they give you a good bite, is pretty quite and long lasting.
No man not at all, my SCR has like 800 miles on it. Hope I don't have to replace the brakes for a good long while.No desire to upgrade as I've never ridden a motorcycle with better brakes than the SCR has. Then again I haven't ridden any other motorcycles newer than 1988 lol. It's probably a little strange but I was quite happy the SCR didn't come with ABS ... thems the breaks I guess.
 

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No man not at all, my SCR has like 800 miles on it. Hope I don't have to replace the brakes for a good long while.No desire to upgrade as I've never ridden a motorcycle with better brakes than the SCR has. Then again I haven't ridden any other motorcycles newer than 1988 lol. It's probably a little strange but I was quite happy the SCR didn't come with ABS ... thems the breaks I guess.
I haven't locked a tire up....yet.
I've noticed that the OEM tires begin to howl and protest as a warning: "Hey, man. It's about to get interesting. You might want to cut that crap out.". Like to today, for instance when a deer walked out in front of me while I was going about 60mph. I had time to slow enough and so did my gf on her V-Star 950. However, I did suddenly wish for a second front disc.
 

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Discussion Starter · #11 ·
... I did suddenly wish for a second front disc
I hear you…… my 80’s Ducati had twin Brembos up front that were confidence inspiring. Then again, knowing you have more stopping power can lure you into more offensive rather than defensive riding >:)
 

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Every time someone says Ducati, I always assume it's taken to the track and pushed to the limit. Thus the need for twin Brembos. So long as the scr950 factory pads still has a good enough bite, then I'm happy as is. Shouldn't be too hard to change them out when the time comes.
 

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Discussion Starter · #16 · (Edited)
makes me wonder what we can poach from the SR400 for the SCR.
My main wish would be the twin analog instruments - speedometer and tachometer to replace the SCR’s poorly legible digital unit. But the SR's old-school clocks are cable driven and the conversion to SCR would be unthinkable.

One other nice SR400 touch is a grease nipple in the tool kit to service the swing arm bearings. How nifty is that?

While we're on the subject of brake pads I'm getting sold on composite ceramic that doesn't shed an unsightly black dust film over forks and wheel rim.
 

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My main wish would be the twin analog instruments - speedometer and tachometer to replace the SCR’s poorly legible digital unit. But the SR's old-school clocks are cable driven and the conversion to SCR would be unthinkable.

One other nice SR400 touch is a grease nipple in the tool kit to service the swing arm bearings. How nifty is that?

While we're on the subject of brake pads I'm getting sold on composite ceramic that doesn't shed an unsightly black dust film over forks and wheel rim.
Some good "insurance" for our wheels while still new and flawless is to get them coated with a wax-like product. Brake dust can do some damage.
 
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