It has been more then 2K miles since I mounted this inexpensive replacement master cylinder for the dual disc 1980 Interstate. I didnt have allot of money to spend on a master cylinder the original was pitted in the bore and seeing how bad it was I didnt trust that I would find a used replacement in better condition. It seemed most unknown used ones folks wanted at least 30 on up to 100 for what may have been no better then my own and still needed a rebuild kit as well.
In comes China with a 14MM bore brand new replacemnt for around 30 bucks shipped to my door, even came with an extra piston,seal,and glass window, that only made me more suspisious about the quality but I bit and a week later it arrived.
Looking it over it didnt seem to have any defects, even had a brake light switch attached wich I`ll comment on later, casting was a little rough but fit of moving parts seemed allright and for me that is what really counts. It installed firmly to my bars with no trouble, the tapping of the mounting threads seemed rough so I used a little ant seize to lubricate the threads, maybe some grease would have been just as good.
Filled it up and loosened the bleed screws and proceded to bleed the brakes. I have heard the brakes arent easy to bleed so I just used some tape to tie the handle all the way in and walked away, came back the next day and refilled it, pumped the lever allot and let sputter out air and brake fluid fom the nuts. Seeing as how it wasnt going to be an easy bleed I then got out the vacuum pump and gave that a go filling and vacuuming fluid , afterwards I was getting slight pressure and again I tied the lever in and walked away.
Next day I did have a pretty good lever but spongy,Bled the system again and got all fluid comming out the bleed screws so not in a hurry so I checked the fluid level and decided that it was at least ridable and so I did and it felt pretty good but did not inspire confidence. few hundred miles later but still didnt feel like I was used to with a stock type master cylinder and the brake light switch had a meldown as well. I have 4 1157 bulbs that all light up when the brakes are applied so I was thinking that had something to do with it. I did buy 2 LED brake light bulbs that should fix that problem..Just havent bought a new switch yet.
Fast forward and I now have a little over 2K miles on the bike since and at some point that master cylinder shure tightened up and feels just as good as any factory master cylinder I have used, it must have bleed a few tiny bubbles or maybe there is a break in period but it stop`s hard when I need to, feels solid and I`m very happy with it. I`m not exactly sure when it all came together, probably some evening it burped the last bubble out.
I just thought anyone that was looking at buying one or those that have bought one should know that given time they do seem to get better, at least that was my experience.
In comes China with a 14MM bore brand new replacemnt for around 30 bucks shipped to my door, even came with an extra piston,seal,and glass window, that only made me more suspisious about the quality but I bit and a week later it arrived.
Looking it over it didnt seem to have any defects, even had a brake light switch attached wich I`ll comment on later, casting was a little rough but fit of moving parts seemed allright and for me that is what really counts. It installed firmly to my bars with no trouble, the tapping of the mounting threads seemed rough so I used a little ant seize to lubricate the threads, maybe some grease would have been just as good.
Filled it up and loosened the bleed screws and proceded to bleed the brakes. I have heard the brakes arent easy to bleed so I just used some tape to tie the handle all the way in and walked away, came back the next day and refilled it, pumped the lever allot and let sputter out air and brake fluid fom the nuts. Seeing as how it wasnt going to be an easy bleed I then got out the vacuum pump and gave that a go filling and vacuuming fluid , afterwards I was getting slight pressure and again I tied the lever in and walked away.
Next day I did have a pretty good lever but spongy,Bled the system again and got all fluid comming out the bleed screws so not in a hurry so I checked the fluid level and decided that it was at least ridable and so I did and it felt pretty good but did not inspire confidence. few hundred miles later but still didnt feel like I was used to with a stock type master cylinder and the brake light switch had a meldown as well. I have 4 1157 bulbs that all light up when the brakes are applied so I was thinking that had something to do with it. I did buy 2 LED brake light bulbs that should fix that problem..Just havent bought a new switch yet.
Fast forward and I now have a little over 2K miles on the bike since and at some point that master cylinder shure tightened up and feels just as good as any factory master cylinder I have used, it must have bleed a few tiny bubbles or maybe there is a break in period but it stop`s hard when I need to, feels solid and I`m very happy with it. I`m not exactly sure when it all came together, probably some evening it burped the last bubble out.
I just thought anyone that was looking at buying one or those that have bought one should know that given time they do seem to get better, at least that was my experience.
