In a clutch

[Ed S, SE Nebr]

Working on getting the bike I bought a week ago on the road.

See this post for some background: http://www.venturerider.org/forum/showthread.php?t=87003

 

In short, it's been sitting for maybe 5 years and I have $550 in it so far.

 

When I squeeze the clutch handle there's no resistance. So, while I can start the motor, I can't disengage the clutch to get it in gear.

 

After some looking it seemed to me like the slave was the most likely cause. I got that out this morning and it looks like I was at least partly correct. The pics show how nasty it was in there. After cleaning up the cylinder I see a tear in the outside seal.

I'm guessing the brown-sugar-looking junk is what old brake fluid turns in to.

 

Most folks say rebuilding the slave cylinder is not worth the trouble; I'm going to agree, especially looking at what I'd be starting with.

The shop near me says a new slave cylinder is $100. Sound right?

RonAyers has them for $70.

Rebuild kit for the master cylinder is $20 online and $30 in the shop.

 

What else?

The rubber cover over the bleeder seems ok. When I first pulled it off I thought it had disintegrated and lots of it had stuck to the case. But it looks like the PO had RTVd it.

 

How about that seal into the clutch case? Doesn't look like this is leaking and I hate mess with something if I don't have to. At the same time, I'm already in there...

 

I'm not ready to stick money into new hydraulic lines just yet. I still don't know if this thing's going to be ride-able or is going to go for parts.

 

Thanks for your thoughts.

 

eds

[Prairiehammer]

I think you are on the right track and have sound logic.

Get a new slave for $70 and worry no more. BTW, I believe a new rubber flap/bleeder screw cap is included in a genuine Yamaha slave assembly.

As for the crankcase oil seal, if it ain't leaking engine oil, then it should be OK.

[Ed S, SE Nebr]

The rubber cover IS inside the dashed line for the kit, isn't it?

 

Thanks

eds

[Peder_y2k]

One can 'feel' the difference between oil and brake fluid in the clutch system. Rubbing a sample between your fingers one feels the slipperiness of oil and the brake fluid has very little. Taking a sample of the accumulation under the engine can help determine if the oil seal is leaking and requires repair. The oil seal is an easy removal and replacement. Do it now, or do it later.

-Pete, in Tacoma WA USA

[bongobobny]

Old brake fluid can and does turn to a sludge like substance, and the masters and slaves get a crystallized crud in them...

[KISA]

The slave cylinder will be suitable for MkI from RSV?

[Brown Angel]

I know shes work but it sure is fun to get her back on road. Keep us posted love the pics.

Ask alot of questions here.

 

Angel:dancefool:

[Prairiehammer]

The slave cylinder will be suitable for MkI from RSV?

 

The part number is same, except for a minor (appearance?) change: 1FK-16381-10-00 for MKI versus 1FK-16381-11-00 for RSV.

 

I would bet they will interchange, but I don't positively know.

[Ed S, SE Nebr]

The part number is same, except for a minor (appearance?) change: 1FK-16381-10-00 for MKI versus 1FK-16381-11-00 for RSV.

 

I would bet they will interchange, but I don't positively know.

 

Cripes. I hope they interchange.

RonAyers.com's parts list shows the 11-00 slave for my '88.

The BOATS link you sent earlier shows the 10-00 number.

 

I have the 11-00 on the way.

Maybe that part is designed to go back in easier!