Scooter back break has allways been weak since i got bike new a few months ago but now its stupid i have it tightened up fully, need to sort urgently but dont have a clue with back wheel and drum break etc
Symptoms are: squeaky, break bolt tightend right up, low breaking power i have had since i got bike allthough i have gradually tightend bolt as it has gotten gradually worse
i think the problem may well be break fluid related as i cant see how the pads would have worn out unless they were somehow not right from factory
so my questions are
how do i check the break fluid as i have never done this, guessing its in maunal someware, need any advice with checking level of fluid etc
My 2nd question is incase the fluid is good has anyone taken the back wheel off if so how easy is it and whats involved
Last Edit: Sept 15, 2006 16:30:10 GMT by Macrofeet
You'll probably have to remove the exhaust (usually 2 bolts at the engine and 3or4 bolts along its length)
You should wear rubber gloves as brake dust is poisonous.
Undo the big nut at the centre of the rear wheel. There may be a split pin through it and a cover which needs to be popped off. You may need to put a piece of wood through the spokes of the wheel to stop it from turning while you undo the wheel nut.
Slacken off the rear brake adjuster to prevent the shoes gripping the wheel when you are wrestling it off.
Give the wheel a jiggle and withdraw it from the wheel spindle. The brake shoes will be visible right there on the back of the engine.
They will be held together with some kind of spring(s). you should be able to lever one out while still attached to the other. Alternatively remove the spring(s) first. Make a note of which way round they were for replacement.
Have a look at the shoes. If the outer layer seems very thin, replace them. If theres plenty of meat on them, clean them with a little petrol or white spirit. While they dry off clean out the dust from the back plate on the engine. This dust can be the cause of the squeaking, if the shoes anre not worn out.
Look at the surface of the brake shoes, if it looks shiny, the shoe has overheated at some point, and the surface has become glazed which reduces braking efficiency. lightly rub the surface of the shoe with emery paper or a small file to achieve a matt finish. rub across the shoe not along it.
Reassemble the shoes and refit them to the brake backplate on the engine. Then refit the wheel and exhaust. You should use a new split pin and exhaust gasket, but I dont always.
Dont forget to readjust the brake with the adjuster Take the bike out and test it.
Hope this helps ;D
Last Edit: Sept 16, 2006 8:21:32 GMT by px166bajaj
I took the wheel of my spare 125 was really simple put it all back together with no hassle
Then i did the same to my working 125 and had a few annoying problems
The wheel nut was 24mil, on my other bike it was 23mil dident have a 24 socket, only found out after i took the exhaust off
lucky for me me dad had one which i aquired off him never to be seen again ;D had to wait ages for him to bring it over tho the inconvenience he took hours lol
Finally got the nut off but the tire would not fit over the oil fill pipe without letting the tire down even tho it did on me other bike .....
"look at the surface of the brake shoes, if it looks shiny, the shoe has overheated at some point, and the surface has become glazed which reduces braking efficiency. lightly rub the surface of the shoe with emery paper or a small file to achieve a matt finish. rub across the shoe not along it."
This had happend i used abit of fine sand/glass paper to sort it
i also set the break cable lever back notch so that i could tighten the bolt more if needs be
Works better now i'm happy that i've seen the pads and they are not worn out allthough i'm not 100% happy with the break power still
Last Edit: Sept 26, 2006 21:11:27 GMT by Macrofeet