pauldalgarno Posted May 20, 2011 Report Share Posted May 20, 2011 Hi folks, As above I've got water in the gearbox oil of my Beta Rev 3 250 (2005). Changed the oil, but back again immediately. My thinking is it's probably a water pump seal, but thought I'd garner opinion before stripping it down. Bike runs OK, and no overheating, so I'm assuming it's not a cylinder head gasket or O-ring up the top end. Any other potential causes or advice? Cheers, Paul Quote Link to comment Share on other sites More sharing options...
technowaldo Posted May 20, 2011 Report Share Posted May 20, 2011 your beta has succumb to the pourous water pump casing syndrome.take the water pump cover off and you will more than likely find it will be all corroded .about Quote Link to comment Share on other sites More sharing options...
si8433176 Posted May 20, 2011 Report Share Posted May 20, 2011 <mention of this company is not permitted on Trials Central> do them for Quote Link to comment Share on other sites More sharing options...
pauldalgarno Posted May 20, 2011 Author Report Share Posted May 20, 2011 <mention of this company is not permitted on Trials Central> do them for Quote Link to comment Share on other sites More sharing options...
john b Posted May 20, 2011 Report Share Posted May 20, 2011 If you're lucky and catch it fairly early then liquid metal and a new water pump seal can do the trick. Worked on my 08 250. cheers John Quote Link to comment Share on other sites More sharing options...
pauldalgarno Posted May 20, 2011 Author Report Share Posted May 20, 2011 If you're lucky and catch it fairly early then liquid metal and a new water pump seal can do the trick. Worked on my 08 250. cheers John Cheers folks, whipped the cover off and looked behind the impeller - wish I hadn't, it's riddled with holes Is there an anti-freeze that is non-corrosive for the new one? Looks like magnesium to me. Quote Link to comment Share on other sites More sharing options...
john b Posted May 20, 2011 Report Share Posted May 20, 2011 Apparently it's the regular change of the antifreeze that's important. You are supposed to change every year to avoid this. I would use std bike antifreeze and regular change (or buy a Scorpa SY200 like I did to eliminate any watercooling problems !! ) cheers John Quote Link to comment Share on other sites More sharing options...
tomtom385 Posted May 21, 2011 Report Share Posted May 21, 2011 Hi, the new casings are all aluminium i believe, so this problem goes away, except for the damage caused by cavitation. Had the same problem, on mine, new casing is the only way really. regards, Tom, Quote Link to comment Share on other sites More sharing options...
andygranger Posted May 21, 2011 Report Share Posted May 21, 2011 I bought a 07 250 on thursday,Dropped the oil yesterday and it was manky Took it to bits and found the casing had holed at the side of the impellor http://i306.photobucket.com/albums/nn268/Tinkle88/securedownload.jpg Quote Link to comment Share on other sites More sharing options...
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