clutch seals

[fjtrevor]

hi guys,
           ive just changed master and slave seals.was wondering how long on average they last. mileage as well as time.thanks

[FJmonkey]

hi guys,
           ive just changed master and slave seals.was wondering how long on average they last. mileage as well as time.thanks

I don't think you will get a solid answer on this. The master (assuming the clutch) is away from the heat and better protected and tends to last much longer than the slave. So I can safely say many miles and for many years after I rebuilt mine. You will change the oil and adjust the valves many times before another seal rebuild.

[Bill_Rockoff]

You left your location blank and gave no information, so I will just make some easy assumptions.
- You live in Canada where it is cool.
- You ride only on the open roads.
- You park the bike indoors where it is temperate and dry.
Your clutch hydraulic seals will last forever, but either your grandchildren or their grandchildren will eventually have to bleed the system to maintain best performance.

Alternately,
- You live in Mexico City where it is hot.
- You are a bike messenger and you spend a lot of time idling in traffic, where engine heat will make the slave cylinder brittle.
- You park the bike outdoors, even in rainy season, so any air that seeps past your brittle slave seal is full of moisture.
You will want to bleed and replace the clutch hydraulic fluid every year, but you can alternate "using the bleeder valve" and "replacing the slave seal" every other year.

[ribbert]

hi guys,
           ive just changed master and slave seals.was wondering how long on average they last. mileage as well as time.thanks

An interesting point you make, time and mileage are often confused when referring to the life of parts and fixes.

A lot will depend on the method used to "clean up" the cylinders before fitting the new cups, the rougher the clean up, the shorter the life. The quality of the components will also contribute to this.
As Mark said, it's hard to put a number on but if done properly, and you don't pull them apart periodically to "service" them, they may well outlast you and the bike.

I know of one FJ that has 155,000 km on the original untouched M/C and the S/C is also original with only one new cup fitted about 100,000km ago and still with no sign of weeping, even then is was only replaced as a precaution. Some guys report much shorter intervals, especially the slave.
There are extremes in both use and environment though that can have an adverse affect on their lifespan.

I would recommend only changing the cup once and the next time is starts leaking, replace the whole unit, they are not expensive.

It's an odd question to ask, there's nothing you can do about it anyway but I believe the average life is just that, average for hydraulic cylinders. They are not prone to premature failure and there's every chance you'll never need to touch them again.

Noel

[fjtrevor]

You left your location blank and gave no information, so I will just make some easy assumptions.
- You live in Canada where it is cool.
- You ride only on the open roads.
- You park the bike indoors where it is temperate and dry.
Your clutch hydraulic seals will last forever, but either your grandchildren or their grandchildren will eventually have to bleed the system to maintain best performance.

thanks for reply bill you got most right except i am in u.k.
thanks everybody for replies.i am grateful

[FJ_Hooligan]

The UK?  You're hosed.  3 weeks max......

:-)