Discs replacement ?

General forum on frames, brakes, suspension, wheels and tires

Moderator: rztom

Post Reply
Message
Author
JKO
Posts: 25
Joined: Thu Jun 21, 2018 10:02 am
Location: Denmark. Fyn. Fåborg.

Discs replacement ?

#1 Post by JKO » Sat Aug 11, 2018 4:08 pm

Can anyone confirm that front and rear RD 350 brake discs fit the RD 500 too?
Jesper Kofoed
Ducati 748S
Suzuki GS500E Electric 5 Kwh battery
Yamaha RD500

silverstrom
- - - - -
- - - - -
Posts: 3236
Joined: Sat Feb 04, 2012 7:36 am

Re: Discs replacement ?

#2 Post by silverstrom » Sat Aug 11, 2018 5:02 pm

RD350 YPVS front discs do fit. I have a pair on an RD500 wheel now that is for project here. RD500 disc thickness is 7.5 mm. RD350 YPVS disc thickness is 5.0 mm (1983-85) or 4.5 mm (1986-90).

User avatar
jackson.40
*****
*****
Posts: 2328
Joined: Fri Dec 30, 2005 7:01 pm
Location: Cambridge,UK

Re: Discs replacement ?

#3 Post by jackson.40 » Sat Aug 11, 2018 6:24 pm

I can confirm the rear disc will not fit and is not vented

bungerlowbill
- - - - -
- - - - -
Posts: 100
Joined: Fri Feb 12, 2010 3:47 pm
Location: surrey u.k

Re: Discs replacement ?

#4 Post by bungerlowbill » Sun Aug 12, 2018 8:22 am

thundercat rear disc same size and disc bolt OCD will fit , rear disc 245mm hope this helps regards

JKO
Posts: 25
Joined: Thu Jun 21, 2018 10:02 am
Location: Denmark. Fyn. Fåborg.

Re: Discs replacement ?

#5 Post by JKO » Sun Aug 12, 2018 3:38 pm

Thanks for all answers.
Can I get the mc approved with RD 350 brake discs where the minimum size is 4mm ?
Jesper Kofoed
Ducati 748S
Suzuki GS500E Electric 5 Kwh battery
Yamaha RD500

JKO
Posts: 25
Joined: Thu Jun 21, 2018 10:02 am
Location: Denmark. Fyn. Fåborg.

Re: Discs replacement ?

#6 Post by JKO » Sun Aug 12, 2018 3:54 pm

Hi bungerlowbill:
So a rear brake disc for yamaha yzf600r thundercat will fit directly on the RD500 and can also be road approved ?
For example. such:
https://www.ebay.com/itm/68B407H8-REAR- ... cat=177922" onclick="window.open(this.href);return false;
Jesper Kofoed
Ducati 748S
Suzuki GS500E Electric 5 Kwh battery
Yamaha RD500

JKO
Posts: 25
Joined: Thu Jun 21, 2018 10:02 am
Location: Denmark. Fyn. Fåborg.

Re: Discs replacement ?

#7 Post by JKO » Tue Aug 14, 2018 7:42 am

Now I have just spoken with the local road supervision.
The message was:
If the MC is from before 1990, then there is nothing in the database about brake discs.
You may not use data from, for example, Hayn's manuals.
The data must be verified by the manufacturer, maybe the original manual is okay, but I do not have it.
Thus, the viewer will read only the minimum thickness of the brake disc,
and if it's OK, the MC will not be discarded due to this.

Are there any problems with brake calipers associated with thin discs, for example. 4mm ?
Normal minimum thickness is 7mm.
Jesper Kofoed
Ducati 748S
Suzuki GS500E Electric 5 Kwh battery
Yamaha RD500

Post Reply