mcharchuk Posted September 14, 2009 Report Share Posted September 14, 2009 (edited) 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, 2009 by mcharchuk Quote Link to comment Share on other sites More sharing options...
jimw Posted September 14, 2009 Report Share Posted September 14, 2009 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 Quote Link to comment Share on other sites More sharing options...
subanator Posted September 14, 2009 Report Share Posted September 14, 2009 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. Quote Link to comment Share on other sites More sharing options...
totalshell Posted September 14, 2009 Report Share Posted September 14, 2009 sorry pal but thats scrap metal now. replacement inner cover is 70 odd quid. takes a couple of hours to sort Quote Link to comment Share on other sites More sharing options...
trialsmm Posted September 14, 2009 Report Share Posted September 14, 2009 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? Quote Link to comment Share on other sites More sharing options...
mecajental Posted September 14, 2009 Report Share Posted September 14, 2009 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 Quote Link to comment Share on other sites More sharing options...
mcharchuk Posted September 15, 2009 Author Report Share Posted September 15, 2009 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? Quote Link to comment Share on other sites More sharing options...
mecajental Posted September 15, 2009 Report Share Posted September 15, 2009 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 Quote Link to comment Share on other sites More sharing options...
mrkartoom Posted September 16, 2009 Report Share Posted September 16, 2009 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. Quote Link to comment Share on other sites More sharing options...
samo Posted September 16, 2009 Report Share Posted September 16, 2009 Is it Motul Motocool-Expert good coolant? I have it in my Beta and it contains ethylene-glycol. Quote Link to comment Share on other sites More sharing options...
mecajental Posted September 16, 2009 Report Share Posted September 16, 2009 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 Quote Link to comment Share on other sites More sharing options...
copemech Posted September 17, 2009 Report Share Posted September 17, 2009 Thought I heard the new cases were Ali, and no longer Magnesium. Not positive about it? Quote Link to comment Share on other sites More sharing options...
houseape1000 Posted September 17, 2009 Report Share Posted September 17, 2009 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. Quote Link to comment Share on other sites More sharing options...
mecajental Posted September 17, 2009 Report Share Posted September 17, 2009 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 Quote Link to comment Share on other sites More sharing options...
pa. Posted September 17, 2009 Report Share Posted September 17, 2009 Thought I heard the new cases were Ali, and no longer Magnesium. Not positive about it? This is correct. Quote Link to comment Share on other sites More sharing options...
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