It seems like after every ride when I check my counter balance oil is foamy or milky looking. I was not suprised when the oil was milky after I played around in a stream last month. But any other time the only water I'm in is an occasional mud puddle on the trails. I pored a quart of oil threw it this time to flush it out real good. I thouht maybe I wasn't getting all the bad oil out and maybe that's why it kept looking milky. I would appreciate any ideas on how to keep this from happening. Thanks

 

I always use Mobil 1 10W30 in mine, actually quiets things down. Take a close look at your o-ring seal on the dipstick. Make sure there are no cuts or other deformaties. Also, take just a bit of oil and coat the o-ring. Make sure there aren't any sharp casting irregularities that could be slicing the o-ring. Also, are you making sure that you're tightening it enough? The water pump seal, and the couterbalance seal are back to back inside your motor. It normally takes a very long time to wear those out...I'm talkin' years here. Migration is also possible there.

 

Its the water pump seal, mine went bad at less than 20 hrs. I have had to do mine 3 times, what a joke, I can't believe they have not fixed this problem yet. Do a search for some more info.

 

Thanks modquad. I use AMSOIL 10W30 synthetic. I use a large washer in the slot of the dipstick cap to tighten it. I've noticed that at finger tight it will work loose. I'll check the o-ring. It's definitely water and not coolant.
Modquad, you seem to know a lot about these bikes so I have another question for you. How tight should the front sprocket be on the countershaft? My sons TB250 has been making a clicking noise from the front sprocket area. I loosen the chain and look things over to find that the front sprocket seems really loose. But it looks to me like the only thing holding it on is the snap ring.

 

The stock front sprockets don't normally last to long. You can contact Hot Seat, they sell Sunstar sprockets. Another source is Sprocket Specialties, either one is much tougher than the stocker. Loosen the chain, then remove the snap-ring. Easy fix.

There's a lot of people with great info on here, ask away, normally the answers are posted pretty quickly. [img]i/expressions/face-icon-small-happy.gif[/img]

 

the front sprocket is designed to float on the shaft ,so it shouldn"t be real tight . your clicking problem might be a loose chain or maybe chain is missing some rollers, I have had this happen before with polaris chains, use DID x ring if you are replacing.

 

My chain clicked at the front sprocket area, and it was a bad link.

Farmr

 

Modquad,
How often do you change your cb oil? This is driving me nuts. Everytime I ride the oil gets milky. The last time I changed the oil I flushed it with a full quart and then filled it again. I'm not riding in a lot of water. An occasional mud puddle but nothing deeper than the floor boards. Does the oil get air in it while it's being circulated. Maybe I'm confusing air in the oil for water!?

 

Your seal is definitely leaking.If you don't get it fixed it will cost you dearly.A new counterbalancer cost about $300 not to mention the bearings will eventually freeze up ,come apart then bust thru the case.The same thing just happened to my friend.I change mine twice a year ,you're only talkin about 70cc of oil.Good luck.

 

Tblazerdad:
I agree, the water that is in the oil must be coming around a leaking water pump seal. The water pump & counterbalance are driven off the same shaft, so a bad water pump seal can easily let water into the counterbalance.

Farmr