Ok I went out for a ride today. After about 3 hours of riding my 2000 200TXT starting making a knocking noise/rattling in the engine. Not sure where as it was hard to tell. It was intermittent between a rattle to a hard sounding knock? I came home washed the bike and changed my oil and it was milky white ie: water? I changed it and fired up the bike still a knock. I check the oil again and its milky white? Any ideas of where to look??? Looks like a big job?

Lets hope its just the water pump that needs replaced.

You water pump shaft seal is probably shot. Possibly even the shaft but its not that expensive of a repair. The knocking noise may be due to the lack of collant now in the cylinder. Try not to run it much longer with out coolant. The little glass eye under the kick starter is for inspecting the fluid like that. In the future look at the glass eye and if you see similar then shut her down and fix the water pump. Txt's were not as bad as pro's for this concern.

--Biff

hi i had a 2001 txt 200 and when riding it started to have a engine knock only small but gradually got worse and worse it was the little end bearings packing up so it may be them

hi i had a 2001 txt 200 and when riding it started to have a engine knock only small but gradually got worse and worse it was the little end bearings packing up so it may be them

Which bearings are you referring to? I'm going to pop the tank off tonight, and check the coolant level.

Hi there,

Definately sounds like you have water in the gearbox oil, probably from the water pump seal passing.

Could be from drowing the bike but then you would know if this is the case.

The seal shaft would have most likely worn a groove and this needs replacing too, you should be able to buy a water pump seal/shaft kit - you need to remove the clutch case to get at the water pump, get a clutch case gasket too just in case! Easy job to do, be careful to line up the water pump plastic gear with the mating gear on the crank - the plastic gear can be easily broken if you try to force the case back on.

Dump the oil asap. Refill with either a 10 weight mineral oil, or an ATF rated to Dexron III, 700ml.

Knock may be "pinging" from lack of coolant allowing the motor to run hot, or a dirty carb, or a little end bearing (the needle roller supporting the gudgeon pin in the piston) - though this is not so common. I always run with a 50:1 fuel/oil mix, 95 Octane.

Bye, PeterB.