Clinician
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Post by paulo on Mar 26, 2016 10:00:58 GMT -6
Hi guys... Last year i bought a second hand yiying benzhou yy-125-t scooter. Its been queit a reliable chineese scooter. Now i need to get a new rear wheel brake disc. Sounds easy right? Actually not...its become a nightmare as it seems like my scooter must be the only one in the world with a 230 mm rear brake disc. I have spent hours researching and have spoken to 2 or 3 different online shops, and there is no disc that size for my scooter. Although my scooter is a yiying benzhou the front lights are stamped jonway. the speedometer is identical too. Even the whole bike is very very similair...yet no jonway so i have been told has a 230 mm rear disc too...Could some "Master Experts" help me out? Im sure there is someone out there who can help me find the reference/make or model for me to order the correct rear brake disc. Any help will be much appreciated my friends. A huge hello from Belgium and a happy easter to everyone. Thanks Paulo   |
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Post by Alleyoop on Mar 26, 2016 11:58:36 GMT -6
Are you sure it is 230mm in diameter I want to see the measurement for myself not that I don't believe you but it is very easy to make a mistake. So I want to see the diameter, put the calipier on each side or measure with a ruler across so I can see what it measures at. As they say MEASURE TWICE CUT ONCE  REASON I want you to verify is I can find one but not 230 in diameter everything else matchs. Alleyoop |
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Doc's Anything Goes
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Post by tvnacman on Mar 27, 2016 7:56:18 GMT -6
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Post by Alleyoop on Mar 27, 2016 11:44:05 GMT -6
John Read what diameter he needs, he needs a 230 diameter disc ALSO his is a 125t-12 not a 150 big difference. |
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Post by cyborg on Mar 27, 2016 11:51:21 GMT -6
Alley is correct yet again,,,I would be measuring the original disk,,,and not to throw gas on a fire but what's wrong with the disk? Doesn't look too bad in the pic,,,,no way to have it resurfaced?
And my condolences to your country for the recent dreadful events,,,,,,
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Clinician
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Post by paulo on Mar 27, 2016 14:49:38 GMT -6
I would like to thank you guys in advance for the replies and help...
@ Alleyoop...I have remounted the disc back on the bike. I can guarantee you its 229/230 mm in diameter. I checked easily 4 times before i remounted it as i searched all over the internet and i found some with same measurments inbetween the mounting holes, but diameter i think was 180 or 190 mm...
@ Cyborg.... The disc is not that bad except for a slight buckle in it...As too resurfaced....yes i could do it but sooner or later im going to need a new one.....
I got into contact with a huge UK online webstore of chinese scooter parts and they too did not have a match.
One thing is certain....it is 230 mm diameter and i am sure im not the only bike on this planet to have that size disc.. (especially coming from china ) :-) It really has made me look for hours and hours to try and identify it....
Ps: I did find once a webstore in France selling parts and there was a disc of 230 mm advertised. I got into contact with them but never recieved an answer. Now they are nowhere to be found....
Thanks Cyborg for condolences....it happened 30 km from where i live....Makes no sense these cowards attacking innocent civilians....
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Doc's Anything Goes
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Post by tvnacman on Mar 27, 2016 19:18:51 GMT -6
I would check the area that contacts the brake pads and see if the smaller diameter rotor would be in full contact with the pads. if you have 5mm over the top of the pad you can give up 10mm in diameter.
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Post by cyborg on Mar 27, 2016 20:00:05 GMT -6
After mounting see how much room there is between the outside edge of the disk and the inside of the caliper,,,,,, it looks to me like the swept area of the disk is very far out to the edge,,,,, and some of the holes drilled in it are not even touched,,,my meaning is you may be able to go out 10 mm,,,,which is actual 5 mm per side
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Post by Alleyoop on Mar 27, 2016 20:40:40 GMT -6
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Clinician
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Post by paulo on Mar 28, 2016 7:15:53 GMT -6
You guys rock....how the hell did i not think "out of the box" I cant get the exact measurment with brake disc mounted but from what i see there is a possibilty to drop the diameter from 230 to 220 as it has queit alot of overhead from brake pad contact point to outer diameter.... that example you sent me alleyoop, would that be possible to mount it on the bike?   |
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Post by Alleyoop on Mar 28, 2016 11:51:47 GMT -6
The 220 is 1/2 of an inch smaller in diameter SO that gives you 1/4 of an inch the disc will be down in the caliper brake pad according your picture the smaller disc would almost be on the edge of the caliper  You can always make it work it all depends on the mount and you can always modify the mounting plate if needed. About the one I posted ASK THE SELLER the question about the MEASUREMENTS you need to know the 3 mounting holes center to center measurent so it will fit yours. |
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Doc's Anything Goes
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Post by tvnacman on Mar 28, 2016 18:30:49 GMT -6
maybe take another look at this again. John |
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Post by Alleyoop on Mar 28, 2016 18:52:36 GMT -6
What he is looking for is a 230 diameter disc which cannot be found "YET".
1. A 230 is little bit over 9 inchs in diameter
2. A 220 is 8 1/2 inchs in diameter
3. A 200 is 7 3/4 inchs in diameter
4. A 190 is 7 1/2 inchs in diameter
5. A 180 is litt over 7 inchs in diameter
So his best bet is anything closer to 9 inchs in diameter.
Alleyoop
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Post by paulo on Apr 1, 2016 15:40:06 GMT -6
I do apologize for not having remembered to change into inches the sizes....easy conversion but i really did not remember....
Just a quick update ( because i owe it and am grateful ) to you guys that took the time to help out.... Also who knows if someone else wont be in a similar situation and stumble upon this thread....
I am just waiting for a last confirmation about a possible solution....It seems EBC (Part number EBC MD989D ) has a rotor slightly smaller than mine (8.84 inches)... the inner diameter is 2.29 which is perfect. This is a front wheel rotor, so drill holes on the pad contact area would run the opposite way...but that is just cosmetic. Just waiting to see if its a straight fit on fixating holes or will i have to re drill new holes. I will post here and let you guys know when i have certainty....
To Alleyoop, tvnacman and cyborg..........Thankyou guys...Have a great weekend.
Paulo
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..BAD TO THE BONE..
