It’s been a little over a year since the EFM Auto Clutch was installed on my V-Star 1300.
Since then I’ve tried to objectively share my impressions and what I’ve learned in three previous reviews. Those three reviews are:
EFM Auto Clutch — First Impressions
EFM Auto Clutch — Almost-But-Not-Quite-Final Impressions
EFM Auto Clutch — Final Review
More people than I ever imagined have shown an interest in the reviews, so I want to continue writing about my experiences with the EFM — good, bad, or neutral — in the hope that others will find it useful. This article talks about some symptoms that developed with my clutch assembly and the solution to that problem.
Last July I left off by saying in Final Review that the EFM Auto Clutch occasionally made a loud rattle/grating and gronking sound on take-off and that sometimes I couldn’t shift from second to first without pulling in the clutch lever. Over the next several months, both of those issues became increasingly more frequent.
Later on, the forward pull described in Almost-But-Not-Quite-Final Impressions suddenly seemed to take on a life of its own, and I experienced a few scary butt-pucker moments while stopping the bike. In fact, in those butt-pucker moments, the clutch pull was so strong I was afraid I might not be able to reign her in.
With the “runaway” clutch pull, I took the bike to Jennifer at Austin City Powersports. After inspecting and measuring the clutch plates and clearances, she tried varying the spacing washers within the recommended range of clearance and also varied the amount of spring washers. Garry, from EFM Auto Clutch, suggested making some more adjustments with the spring washers. Any and all small adjustments were either too much or not enough, and it was impossible to fine tune the adjustment so it worked properly. None of that worked to her satisfaction.
Even though the friction plates still measured within Yamaha specs, they were glazed. Jennifer replaced the old friction plates and then had to start over with correct clearances and spring washer adjustments. That solved everything. I consider myself lucky to have a mechanic who stuck with it long enough to find a fix.
So, to make a long story short, last week I picked up my bike, went on a nice, long ride, and can confidently say that riding with the EFM Auto Clutch is back to normal. In the future, if any of these annoying symptoms show up again, I won’t put up with them for long!
Central Texas has had some rain, bluebonnets are blooming, and it’s time to get out and ride!
Peace on the Road!