Out for a long ride today and the water pump started leaking. I took it apart and this is what is there - http://www.ebizviewer.com/2008BetaRev3.jpg .

Can it be saved or should I be getting a new internal clutch cover? It looks like the corrosion has prevented the o-ring to be held in place.

I think the part no is 12-62663-0-67.

Edited September 14, 200916 yr by mcharchuk

That looks buggered. On the plus side the new cases are made out of different stuff and aren't supposed to corrode. It's also an easy job. Make sure you use a good quality coolant premix as well.

Regards

Jim

Also do a search in this part of the forum, this subject has been done a few times over a couple of years. Answers to your questions are within.

sorry pal but thats scrap metal now. replacement inner cover is 70 odd quid. takes a couple of hours to sort

My '04 Rev3-250 and my '06 Rev3-200 did the same thing. Both bikes were used, I replaced the clutch side case, seals and bearings. I use Honda coolant and replace it often. NEVER dilute with water! The Beta dealer should sell you the parts at costs. Seems to be a common problem.

I wonder if other bikes have the same problem?

It's a very common trouble on Beta's. The cause is that the cover is made in magnesium, and magnesium is one of the most easy materials to be corroded, especially if it's in contact with other metals. It's a problem of erosion-corrosion.

I repaired an old corroded cover and protect another new one. Here you are the pictures:

Now, the protection of the new cover.

Saludos

Thanks for the info. Should I be replacing all of the seals and bearings at the same time as the case or can they be popped out easily enough?

You need to remove the bearing and seal from the pump to mount it on the new cover. You will need a new seal. If the bearing is damaged, replace it too.

Saludos

I found the same thing on the used 2003 Rev3 I purchased recently and had to replace the cover. I was told to check for it as it is very common problem with the magnesium. I found it just in time before it ate its way into the engine cavity. To my surprise the worst of it was behind the impeller. It's an easy fix with the new cover and you'll know what needs replacing once you remove it. Mine looked worse than yours and I only needed to replace the seal behind the impeller in addition to the cover. When you replace it stay away from glycol based coolants. I was told a couple brands to use and ended up going with Silkolene ProCool. Also if the bike goes into storage for a long period of time drain it to be safe.

Is it Motul Motocool-Expert good coolant? I have it in my Beta and it contains ethylene-glycol.

Is it Motul Motocool-Expert good coolant? I have it in my Beta and it contains ethylene-glycol.

I don't know if it's good or not, but it's an organic one. All coolants contains a glycol base.

I use an organic one, too.

Saludos

Thought I heard the new cases were Ali, and no longer Magnesium. Not positive about it?

you could try removing the the bit of inner lip thats left with a small file, then when its flat use thick, oil resistant gasket paper and make your own gasket.

I know this is it a bit '' bodge it and scarper'' but if doesn,t work, well it was buggered anyway...

If nothing else it might just get you to winter.

Thought I heard the new cases were Ali, and no longer Magnesium. Not positive about it?

I heard about aluminium cases too, but I haven't seen it. Anyone here has got one.

Saludos

Thought I heard the new cases were Ali, and no longer Magnesium. Not positive about it?

This is correct.