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techtalk:ref:carb06 [2019/07/17 23:13] hippysmack [Aftermarket Air Cleaners and Modifications] |
techtalk:ref:carb06 [2019/07/17 23:30] hippysmack [Aftermarket Air Cleaners and Modifications] |
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| For these breathers you would need to get a head breather kit and carb support bracket. \\ | For these breathers you would need to get a head breather kit and carb support bracket. \\ | ||
| The breather kit routes the head vents to the ground (or atmosphere) while the carb support bracket keeps the carb in the intake. \\ | The breather kit routes the head vents to the ground (or atmosphere) while the carb support bracket keeps the carb in the intake. \\ | ||
| + | \\ | ||
| + | This is a breather vent re-direction on an EFI model. ((jcmellis of the XLFORUM http://xlforum.net/forums/showthread.php?t=1179974)) \\ | ||
| + | A small amount of crankcase oil was dripping into the A/C on a Figure Machine/Engineering air cleaner assembly. \\ | ||
| + | This air cleaner uses the stock Harley-Davidson breather tubes. \\ | ||
| + | There was no drip into the stock a/c but using the same breather tubes, it did with the afrtermarket A/C. \\ | ||
| + | This mod doesn't bypass the air cleaner. \\ | ||
| + | It doesn't solve the problem but rather just hides it. \\ | ||
| + | You still have the excess oil but this will arrange for it to run straight into the intake and away from the A/C. \\ | ||
| + | The problem is that the oil vapor needs to make a 180 degree turn, up and over the lip of the kit's bell-mouth, into the throttle body. \\ | ||
| + | A rubber hose would work, except the radius of the curve is too sharp due of the limited space inside the filter. \\ | ||
| + | It'd take some sort of semi-rigid tube. \\ | ||
| + | |||
| + | The Screaming Eagle Stage 1 air cleaner deals with the venting issue using two small preformed rubber tubes or hoses. \\ | ||
| + | The Figure Machine air cleaner utilizes the stock Harley breather hoses (63520-04). \\ | ||
| + | The hoses fit perfectly over the breathers. \\ | ||
| + | The only problem is that about 3/8" needs to be trimmed from both ends to fit the different internal dimensions of the filter/air cleaner. \\ | ||
| + | (The photo above shows the stock part on the left and the trimmed part on the right.) \\ | ||
| + | Once trimmed to size, the hoses are positioned at the mouth of the throttle body. \\ | ||
| + | |||
| + | {{:techtalk:ref:carb:hd_breather_mod_1_by_jcmellis.jpg?direct&300|}} ((photo by jcmellis of the XLFORUM http://xlforum.net/forums/showthread.php?t=1179974)) {{:techtalk:ref:carb:hd_breather_mod_2_by_jcmellis.jpg?direct&300|}} ((photo by jcmellis of the XLFORUM http://xlforum.net/forums/showthread.php?t=1179974)) | ||
| ====== Running the Breather Hoses (91 and UP) ====== | ====== Running the Breather Hoses (91 and UP) ====== | ||
| ===== How the umbrella ( head breather) valves work ===== | ===== How the umbrella ( head breather) valves work ===== | ||
