Hydraulic Brake Lever Master Cylinder Sight Lens 18mm - (Set of 2), Premium Replacement Kit with O-Rings by Precision Auto Products Review

Works great! I pulled out the old broken lens on the main cylinder and pushed it in with a large C clip. I installed it on an original '86 Honda Goldwing master cylinder.

I took the master cylinder apart and shot peened it for the restoration and was very happy to find these replacement sight glasses. Haven't installed it yet but looks like the perfect easy to install press. has an o-ring that sits behind and the o-ring fits perfectly. buy again

I don't know how long it will last but they fit perfectly and don't leak. They were exactly as advertised, they said if you want them to be better order their other version, the glass version. I wasn't quite sure what to expect and when I received them I was glad they fit and worked.

Does not fit 1985 Honda Fourtrax 250 master cylinder. I understand the installation process. The depth must have been wrong because when pushed, it completely crushed the master cylinder o-ring groove before the sight glass was even remotely level. The master brake cylinder is original. After I removed it and used the second glass, all I had to do was place the o-ring in the hole and press the glass against it and hope for the best. So far, so good.

*EDIT* Brake sight glass deteriorated in two years. Not bad for the price but definitely not a 5 star product. The original review is as follows: Worked exactly as intended on my '86 Honda Goldwing. Be sure to remove all pieces of the old sight glass before attempting to install this - often a metal ring will remain after you pull out the main glass. old ones, but I don't think they will.

I tried to clean the service glass on my quad's front master cylinder and found it was soft and leaking brake fluid. The local dealer said I had to buy a complete handbrake assembly for about $70. I kept looking and found these and thought I'd give them a try. It took about 10 minutes to fix the leak. Just touch the old one by slightly heating the heat gun and the ring and gasket will be easy to remove. Clean the hole and install the new glass and ring with a clamp and wood. When properly…

Works great but you will need 2 because like me you break one you will need the second, it fits my 86 Honda Shadow 500 and leaks but doesn't I'm not saying you shouldn't try this installation method. The best way to avoid bending the sight glass body is to use a block of wood and a vice. I used a c-clip and a block of wood to make sure it went in evenly and once it was in I took the block out, covered the scope with a rag and laid the c-clip down the way you rotate it. but only the side that is