1989 KX 125 front brake issues

final touch
Having issues with my front brake it doesn’t work very well at all very spongy ,so far I’ve rebuilt the master cylinder with new seals rebuilt the calliper new front disc as the old one was glazed ,and genuine nissin pads ,it already has a braided brake line.I’ve took these videos

1st one of the pistons one seems to come out a lot easier than the other is this normal ?both push back in to the calliper with ease.

2nd seems to be quite a lot of play in the calliper or is this normal ?

Hopefully these links work.

https://youtube.com/shorts/3ecOIvod9n4?feature=share

https://youtube.com/shorts/lca1iwWRB30?feature=share
|
Tracktor
Profile picture for user Tracktor
Posts
2343
Joined
8/17/2006
Location
The RTF/Amboy, WA, USA
Tracktor 3/31/2022 11:30am
3/31/2022 11:30am
final touch wrote:
Having issues with my front brake it doesn’t work very well at all very spongy ,so far I’ve rebuilt the master cylinder with new seals rebuilt...
Having issues with my front brake it doesn’t work very well at all very spongy ,so far I’ve rebuilt the master cylinder with new seals rebuilt the calliper new front disc as the old one was glazed ,and genuine nissin pads ,it already has a braided brake line.I’ve took these videos

1st one of the pistons one seems to come out a lot easier than the other is this normal ?both push back in to the calliper with ease.

2nd seems to be quite a lot of play in the calliper or is this normal ?

Hopefully these links work.

https://youtube.com/shorts/3ecOIvod9n4?feature=share

https://youtube.com/shorts/lca1iwWRB30?feature=share
On any older bike easiest way to get good front brake feel is to use Honda MC & line (if you can). 07+ CRF works best but even an older CR/CRF will make a big difference...........cheap on ebay.....
1
final touch 4/1/2022 4:20am
4/1/2022 4:20am
Thanks for that I’ll take a look
Factor E
Profile picture for user Factor E
Posts
962
Joined
9/22/2011
Location
So Cal, CA, USA
Factor E 4/1/2022 8:20am
4/1/2022 8:20am
How did you bleed the system?
final touch 4/1/2022 8:40am
4/1/2022 8:40am
Factor E wrote:
How did you bleed the system?
The old fashioned way and then by back bleeding ,also left a cable tie around the front back over night ,might of made a slight difference but nothing much

The Shop

See All »
Factor E
Profile picture for user Factor E
Posts
962
Joined
9/22/2011
Location
So Cal, CA, USA
Factor E 4/2/2022 1:48am
4/2/2022 1:48am
Now bleed at Banjo fittings a couple of times
start at top. Crack open/close w pressure on lever
After both ends done then crack bleed screw again
should get more pressure.
final touch 4/2/2022 2:53am
4/2/2022 2:53am
Factor E wrote:
How did you bleed the system?
final touch wrote:
The old fashioned way and then by back bleeding ,also left a cable tie around the front back over night ,might of made a slight difference...
The old fashioned way and then by back bleeding ,also left a cable tie around the front back over night ,might of made a slight difference but nothing much
Will give this a try thanks for the advice ,can you see any issues in the videos I posted or does everything look normal

Post a reply to: 1989 KX 125 front brake issues