awilliams64 Posted August 17, 2014 Report Share Posted August 17, 2014 Not sure what this is, I think its the crankcase breather,,,is it really needed? It seems to take up a lot of space.. Quote Link to comment Share on other sites More sharing options...
zerorev3rev4 Posted August 17, 2014 Report Share Posted August 17, 2014 should be able to pipe straight to the air box if it has no other function Quote Link to comment Share on other sites More sharing options...
axulsuv Posted August 17, 2014 Report Share Posted August 17, 2014 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 Quote Link to comment Share on other sites More sharing options...
awilliams64 Posted August 17, 2014 Author Report Share Posted August 17, 2014 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 Quote Link to comment Share on other sites More sharing options...
lineaway Posted August 18, 2014 Report Share Posted August 18, 2014 Sold a trials bike and kept a trail bike? Quote Link to comment Share on other sites More sharing options...
htrdoug Posted August 18, 2014 Report Share Posted August 18, 2014 (edited) 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, 2014 by htrdoug 1 Quote Link to comment Share on other sites More sharing options...
awilliams64 Posted August 18, 2014 Author Report Share Posted August 18, 2014 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. Quote Link to comment Share on other sites More sharing options...
fp90lawrence Posted September 17, 2014 Report Share Posted September 17, 2014 If removed, don't forget to plug the hole to the air box! Quote Link to comment Share on other sites More sharing options...
thats_a_five Posted September 17, 2014 Report Share Posted September 17, 2014 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. Quote Link to comment Share on other sites More sharing options...
Rollox Posted September 18, 2014 Report Share Posted September 18, 2014 (edited) ... 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, 2014 by rollox Quote Link to comment Share on other sites More sharing options...
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