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Something we came across the other day on our 2023 Husqvarna FC350 test bike that some of you should be aware of:
We were riding at our local test track and noticed our clutch lever pressure/engagement was going in and out. One minute we would have engagement on the Brembo hydraulic clutch and the next minute there would be no engagement as well as zero clutch pressure at the lever. We were puzzled for a little while and even thought it was a faulty slave cylinder. After changing the slave cylinder and bleeding the hydraulic line, we finally saw the culprit. The breather hose, from the crankcase, that routes down the engine, towards the linkage was pinched. We have seen a couple from the dealerships like this as well as consumers greasing their linkages then installing the breather hose in the incorrect position. Before you bleed or change out your slave cylinder, because your clutch lever pressure or engagement feels off, just take a look at the breather hose first. This could save you some headaches and money! What happens is the crankcase pressure builds up in the cases and it collapses the slave cylinder causing intermittent engagement.
Please view below the right way and wrong way of the breather hose.