August 17, 201412 yr Not sure what this is, I think its the crankcase breather,,,is it really needed? It seems to take up a lot of space..
August 17, 201412 yr Crankcase breather/oil separator ... Surprised it's still there !?! Take it off and plumb to the airbox for safety and deep water crossings or just stuff the tube under the swingarm shaft like someone did to my kids reflex ... I never even noticed it before ! And the shop manual shows it , but never really explains it !. emission controls ... Glenn
August 17, 201412 yr Author ahh emissions, I am sure I can definitely do with out it the. Its kind of cool that I am coming across some of these older bikes. I just bought a 1974 ty 250 "cat" today. Kept if for less than an hour and one of my friends bought it, but its still cool to find these bikes and save them from some kid abusing them as a moto crosser
August 18, 201412 yr If the breather is clean inside and flows well it's actually beneficial,it will catch the oil in the vapor and return it to the crankcase,only penalty is the weight. The type of emissions it reduces does not impact performance.That said,it's probably more important if being used on the road,plus,it's ugly.Do the footpeg mod,Put some trials tires on that thing and ride it ;-) Vintage Cup next year!!! Edited August 18, 201412 yr by htrdoug
August 18, 201412 yr Author Sold a trials bike and kept a trail bike? yeah, I have enough bikes for now, the ty250 was just a fluke coming across it and it was a good deal. I put it in the hands of a guy that does a lot of work on the ty's. He will find a good home for it.
September 17, 201411 yr The breather / oil separator was required on bikes registered in California ( and maybe other states). It does not affect the running of the bike. The only caution I have is that in some states (CA and AZ, I know), for road registered vehicles all the emission control pieces must be in place to pass emission tests. If you don't need to pass emission tests, you can remove it but you still need a crankcase breather.
September 18, 201411 yr ... If you don't need to pass emission tests, you can remove it but you still need a crankcase breather. A little K&N crankcase filter helps to keep dirt and water out of the motor. Just put it in the airbox: and together with K&N air filter: Edited September 19, 201411 yr by rollox
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.