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Marketplace => Wanted => Topic started by: LWC82PE on June 28, 2015, 10:27:34 am

Title: 76 RM250/370A rear brake plate
Post by: LWC82PE on June 28, 2015, 10:27:34 am
Looking for a rear brake plate for a 76 RM250/370 for 15mm axle.
codrington307 at h0tmail d0t c0m
Title: Re: 76 RM250/370A rear brake plate
Post by: micko on June 30, 2015, 06:57:33 pm
I may have one, will check tonite
Title: Re: 76 RM250/370A rear brake plate
Post by: LWC82PE on June 30, 2015, 07:16:33 pm
Ok thanks.
Title: Re: 76 RM250/370A rear brake plate
Post by: bigk on June 30, 2015, 07:53:54 pm
I possibly have one as well but have no idea how to identify. Any clues?
Cheers,
K
Title: Re: 76 RM250/370A rear brake plate
Post by: LWC82PE on June 30, 2015, 08:05:57 pm
I could probably tell from a photo but i am probably about as clueless on them as you are. It will have a lug for brake cable, 15mm axle, 150mm brake shoes. 77 will be for 17mm axle. Since its from a non ADR bike it may not have 'wear lining limit'? Its a guess.
Title: Re: 76 RM250/370A rear brake plate
Post by: LWC82PE on June 30, 2015, 09:20:50 pm
It does actually have the wear limit indicator on it

(https://fhqjcw.bl3301.livefilestore.com/y2p_YZqzpPBcv7CGP7mRzSATrISGAOug9qqE5V3CjssNNd0uM8qKBGPOeC08H8Tq7ZFCBudWR-jnd85siXk7A60GvT6f_aENw9fzD6MI9niLQ-_Wc9vWrzuUdXf8UVUzhms4RpOEEYqmX5YpNxaYbW-n1crIfN5AvswyMFRV2W2_38/76rmhub.JPG?psid=1)
Title: Re: 76 RM250/370A rear brake plate
Post by: bigk on July 01, 2015, 10:11:02 am
Found 2. One is stuck in a hub which has corrosion, it looks good but not sure if I can get it out without damaging it. The other has had the cable lug repaired but it's a decent repair & once painted no-one would know. Send me your email address again please (my computer has had the hard drive replaced & I lost all the contacts).
Cheers,
K
Title: Re: 76 RM250/370A rear brake plate
Post by: micko on July 01, 2015, 01:46:02 pm
Sorry, couldn't get out to the shed last nite. I will look tonite, I have a brand new one - just have to check the axle size
Title: Re: 76 RM250/370A rear brake plate
Post by: micko on July 02, 2015, 04:04:24 pm
Sorry, its the 17mm. Must be 77 "B"
Title: Re: 76 RM250/370A rear brake plate
Post by: LWC82PE on July 02, 2015, 05:12:05 pm
I am still interested in a B plate aswell.
Title: Re: 76 RM250/370A rear brake plate
Post by: LWC82PE on July 22, 2015, 08:02:09 pm
I am still needing a 76 plate.
Title: Re: 76 RM250/370A rear brake plate
Post by: LWC82PE on October 24, 2015, 11:43:05 am
Still looking for a A model plate.
Title: Re: 76 RM250/370A rear brake plate
Post by: Davey Crocket on October 24, 2015, 12:03:42 pm
New ones come up all the time, even the "mag" one.....try Paul Millar cycles in the US
Title: Re: 76 RM250/370A rear brake plate
Post by: Oldfart on October 24, 2015, 03:41:39 pm
Think I have one gathering dust....
Title: Re: 76 RM250/370A rear brake plate
Post by: LWC82PE on October 24, 2015, 06:23:12 pm
Never seems to be any when i have looked but that has been used one. Maybe i need to search by part number for NOS one then.

Another thing, the 76 parts book shows these parts but i dont understand why it would have these when the brake is non floating. If this is the wrong drawing, does anyone know a site that has the correct one for the 76?

(http://i1105.photobucket.com/albums/h357/30782/250a_zpska1wq658.jpg~original)
Title: Re: 76 RM250/370A rear brake plate
Post by: Rossvickicampbell on October 24, 2015, 06:51:07 pm
which site is this from?
Title: Re: 76 RM250/370A rear brake plate
Post by: Oldfart on October 24, 2015, 07:40:40 pm
76...  Rm 250-370  has a smaller dia hole thru plate that axle just paces thru  .... from memory around 15.5mm ??
Title: Re: 76 RM250/370A rear brake plate
Post by: LWC82PE on October 24, 2015, 09:30:40 pm
CMSNL but its the same drawing on Alpha-Sports.

Yes i would of thought the A model is just a straight 15mm hole too, but i cant work out what the parts book shows those bushes in the plate.

Anyone actually have the correct 250/370 A printed parts book?
Title: Re: 76 RM250/370A rear brake plate
Post by: Rossvickicampbell on October 24, 2015, 09:36:29 pm
Partzilla is the same albeit with different numbers.
Title: Re: 76 RM250/370A rear brake plate
Post by: LWC82PE on October 24, 2015, 09:46:06 pm
I have just found a combined 76-78 microfiche dated june 80 so i will see what that shows. Cant see it clearly enough with the pocket viewer so i will have to put it in the full blown reader tomorrow.
Title: Re: 76 RM250/370A rear brake plate
Post by: LWC82PE on October 25, 2015, 03:46:33 pm
So I looked up the parts numbers on the microfiche and there are 3 plates listed for the A model inc a magnesium one.
Parts 13, 14, 15 & 4 are listed in a way that suggests they are to be used with any of the 3 A backing plates. There is nothing that says they are only used from  certain frame number onwards or only with one of the 3 backing plates. I also checked the C2 model plate and its a different number and actually uses a bearing, so these A model bush parts are nothing to do with a full floating brake either, i do not understand their reasoning as to why they would be required on a non floating plate.

I guess i will jsut have to try find one of the 3 A model plates and then if it turns out it requires parts 13, 14, 15 & 4 then i will have to get them after.

Has anyone seen a A model plate that has a 15mm hole straight in the backing plate or are they all machined out bigger and then reduced to 15mm with parts 4 & 13?
Title: Re: 76 RM250/370A rear brake plate
Post by: TT5 Matt on October 25, 2015, 05:30:45 pm
maybe they were going to do a floating rear brake and decided not to [bean counters deemed it too exspensive!] as b models are solid or left over parts from rh/rn's
Title: Re: 76 RM250/370A rear brake plate
Post by: Oldfart on October 25, 2015, 05:46:01 pm
yes I have a NOS plate
Title: Re: 76 RM250/370A rear brake plate
Post by: crs-and-rms on October 25, 2015, 06:12:35 pm
i have two a/b backing plates one is the magnesium and the other is the standard plate both have the steel insert in them with the hole 15mm in dia looks like they are cast into the backing plate. just had a look at the parts book  think mine are b,c backing plates not a
Title: Re: 76 RM250/370A rear brake plate
Post by: LWC82PE on October 25, 2015, 08:43:30 pm
Quote
i have two a/b backing plates one is the magnesium and the other is the standard plate both have the steel insert in them with the hole 15mm in dia looks like they are cast into the backing plate. just had a look at the parts book  think mine are b,c backing plates not a

B model is for 17mm axle so if both yours are 15mm then they are both 76 A.

I thought that maybe the bushes were just for the magnesium plate to add more durability but the parts fiche does not indicate that.

Oldfart what is the part number for the NOS plate you have that does not use parts 13, 14, 15 & 4? Thats the one i prefer.
Title: Re: 76 RM250/370A rear brake plate
Post by: Oldfart on October 25, 2015, 09:51:04 pm
64210-41102      with a number on inside of plate 430... mine is alloy not magnesium.
Title: Re: 76 RM250/370A rear brake plate
Post by: LWC82PE on October 26, 2015, 01:02:27 am
Great, now I know the one to find. Doubt there's many magnesium ones around.
Title: Re: 76 RM250/370A rear brake plate
Post by: LWC82PE on October 27, 2015, 06:55:28 pm
Tried Paul Miller and he has none of the plates.
Title: Re: 76 RM250/370A rear brake plate
Post by: matcho mick on October 29, 2015, 11:54:31 am
i have a bare one,it's 17mm axle,has 490 on the inside?, :P
Title: Re: 76 RM250/370A rear brake plate
Post by: LWC82PE on October 29, 2015, 01:02:50 pm
Thanks but

15mm = 76 A
17mm = 77 B

I am after 76 A
Title: Re: 76 RM250/370A rear brake plate
Post by: Jumbo J on October 29, 2015, 07:54:55 pm
Does it have to be RM, TS 15mm no good?
Title: Re: 76 RM250/370A rear brake plate
Post by: LWC82PE on October 29, 2015, 08:19:21 pm
I have TS one if i cant find RM one but RM is narrower which i need. NOS magnesium one would be nice though :)