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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Engine » Breathers (crankcase breathing system) » Sorry for the stupid Q but why do I need a catch can? « Previous Next »

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Js_buell
Posted on Thursday, January 01, 2009 - 05:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I just wonder what does the catch can do to the performance of the motor, I know it is supposed to keep stuff out of the motor but how and what are the advantage of it? Thank you for your patience I know a lot about airplane motors but not so much about cars and bikes mechanic and want to get better.
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Tim
Posted on Friday, January 02, 2009 - 10:36 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The catch can itself doesn't do anything to performance. Its routing the breathers so that they are spewing their water/oil vapor cocktail somewhere other than the intake that improves the performance. The catch can is just to keep from making a mess on the ground or bike.
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Js_buell
Posted on Friday, January 02, 2009 - 11:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ok thx. How hard is the installation of a kit? Let's say the drummer kit for exemple

(Message edited by js_buell on January 02, 2009)
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Buellfart
Posted on Thursday, February 05, 2009 - 06:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You can also route the hose out around the oil filter and just let it hit the road, just a few drops anyway.
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Bombardier
Posted on Thursday, February 05, 2009 - 08:24 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

May not improve your performance but may well improve the longevity of your sensors as they will not be getting covered with the oil/water mix in the airbox and the extra burnt oil through to your O2 sensor and the carbon build up in the cylinders.
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