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New brakes time

Started by Waiex191, July 30, 2023, 09:52:26 PM

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Pat Conlon

Do you have the correct seals for your model of caliper?

The Yamaha axial mount monoblock calipers comes in two flavors
1) the 2001 and earlier silver or blue button calipers use the thinner wall stainless steel pistons.. the seals on these calipers are crazy expensive (and I don't know why) see here:
https://www.partzilla.com/catalog/yamaha/motorcycle/2001/yzfr1-yzfr1n/front-brake-caliper

2) the 2002/2003 gold button calipers (last years of the axial mount caliper on the R-1) uses the thicker wall aluminum pistons...these seals are a different part # than the above seals and are much less expensive.
https://www.partzilla.com/catalog/yamaha/motorcycle/2003/r1-yzfr1r/front-brake-caliper

I'm not sure you can use the less expensive aluminum piston seals on the stainless steel piston calipers, the part #25803 is the same, but model prefix is different and on the 'Related Fitment' listings I see no backward compatibility with the 02/03 seals and bikes using the earlier calipers.

Aluminum pistons use inexpensive seals:


Stainless pistons use $$$ seals



Cheers.  Pat
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

Waiex191

Pat,
I've got stainless pistons and bought the kit from RPM. They seemed right.

I've just got the MC back together. I may have done a poor job on installing the new seals. I also re-cleaned everything and polished the piston where the seal rides. Also the inboard seal was not stuck on the spring properly the first go. I think it's better. We will see shortly.
Bryan
1989 FJ1200
1981 Suzuki GN400
Poplar Grove, IL
 

Millietant

Not sure why it is Pat, but the seals for my stainless early blue spots R1 calipers are not particularly expensive compared to seals for most other bikes. Not had any issues with my R1 calipers over site a few years.

I wonder if it's just an availability issue in the USA that is driving the price up?
Dean

'89 FJ 1200 3CV - owned from new.
'89 FJ 1200 3CV - no engine, tank, seat....parts bike for the future.
'88 FJ 1200 3CV - complete runner 2024 resto project
'88 FJ 1200 3CV - became a race bike, no longer with us.
'86 FJ 1200 1TX - sold to my boss to finance the '89 3CV I still own.

Pat Conlon

I hear ya Dean, the price is one thing, but different part # prefixes and according to the 'related fitment' listings, it shows only forward compatibility for the 2002/2003 seals and no backward compatibility for the earlier calipers. Same with the 2001 and earlier seals, No forward compatibility with the 2002+ calipers.

I wonder what's up? I think I'll go visit the R-1 forum and ask the question.

Bryan, what Yamaha part # did you get?

Cheers
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

Waiex191

Quote from: Pat Conlon on September 16, 2023, 07:13:55 PM
Bryan, what Yamaha part # did you get?

Cheers
390N?  That's on the casting.
Bryan
1989 FJ1200
1981 Suzuki GN400
Poplar Grove, IL
 

Pat Conlon

1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

Waiex191

Bryan
1989 FJ1200
1981 Suzuki GN400
Poplar Grove, IL
 

Pat Conlon

1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

Waiex191

Quote from: Pat Conlon on September 17, 2023, 06:30:02 PM
Ok, no problem,  I was just wondering if they had a Yamaha part # on the bag vs aftermarket.
From memory, the parts were in an unmarked bag.  The RPM folks probably know what they are.

I think I have my leaks squared away.  Bike is packed up for tomorrow's commute after a short test ride tonight.

Still working fender fixes, I'll share that later.
Bryan
1989 FJ1200
1981 Suzuki GN400
Poplar Grove, IL