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Shimano Sora Derailleur ?

Old 06-06-20, 12:50 PM
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FREEBIRD1
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Shimano Sora Derailleur ?

I have a new Lightining Phantom recumbent with Shimano Sora rear derailleur and Deore shifters. (I realize on this bike they use the cheapest components available), but I would still like to ride it this season. Anyone have experience tuning these? it will shift ,but hops off the smallest cog, I can run up to the next to the last, but not top high gear. Everything is lined up correct. I'm starting to think the dealer gave me the wrong chain, or the cassette is defective or incorrect. I do a standard tune as I do on all of my bikes, but this one will not cooperate. Any suggestions?

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Old 06-06-20, 01:07 PM
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Bill Kapaun
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Sounds like the H screw is adjusted too far out, assuming it "hops off" the outside of the smallest cog.
The quality level of the parts is more than sufficient.
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Old 06-06-20, 01:39 PM
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Basic derailleur adjustment should suffice. Do you have prior experience with this? Adjusting for the small cog is best done with the cable undone so that the derailleur is completely at rest on its own.
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Old 06-06-20, 03:40 PM
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Originally Posted by Eric S. View Post
Basic derailleur adjustment should suffice. Do you have prior experience with this? Adjusting for the small cog is best done with the cable undone so that the derailleur is completely at rest on its own.
Yep, did that, that's the first thing I learned on tune-ups. The derailleur on this bike is really sensitive to the tension adjustment on the barrel screw. and the shifters are pretty slow. I managed to get it to run through the gears so it is rideable, I did not expect much from that unit it's about a $30 piece retail. Thanks for the quick replies, you guys are the best
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Old 06-06-20, 04:40 PM
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Lube the cable.
Adjust H screw.
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Old 06-06-20, 05:01 PM
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I have a Sora rear derailleur on my bike. It's a perfectly good device. Just adjust it accordingly.
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Old 06-06-20, 05:05 PM
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Originally Posted by Bill Kapaun View Post
Lube the cable.
Adjust H screw.
Make certain that the rear shifter has paid out all of the cable (it is in high gear position) before attaching it to the derailleur; click the shifter a few times while pulling on the cable to ensure this. It sounds like you are off 1 gear in your indexing, besides having a mis-adjusted high limit screw. Make sure the low limit screw does not allow the derailleur to shift past the big cog.
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Old 06-06-20, 05:43 PM
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Originally Posted by dsbrantjr View Post
Make certain that the rear shifter has paid out all of the cable (it is in high gear position) before attaching it to the derailleur; click the shifter a few times while pulling on the cable to ensure this. It sounds like you are off 1 gear in your indexing, besides having a mis-adjusted high limit screw. Make sure the low limit screw does not allow the derailleur to shift past the big cog.
All is good now on it (or as good as it gets with this one).
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Old 06-06-20, 05:49 PM
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Originally Posted by FREEBIRD1 View Post
All is good now on it (or as good as it gets with this one).
There is no reason that the Sora derailleur should not perform its task perfectly well. Higher-level components may be lighter or better finished but all will function properly IF correctly installed and adjusted. One suggestion would be to have the derailleur hanger adjustment checked; even on a new bike it may be slightly off.
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Old 06-06-20, 05:54 PM
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Originally Posted by dsbrantjr View Post
There is no reason that the Sora derailleur should not perform its task perfectly well. Higher-level components may be lighter or better finished but all will function properly IF correctly installed and adjusted. One suggestion would be to have the derailleur hanger adjustment checked; even on a new bike it may be slightly off.
Probably a good idea, who knows what type of handling these things see before they arrive at your doorstep.
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Old 06-06-20, 10:11 PM
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Originally Posted by FREEBIRD1 View Post
Probably a good idea, who knows what type of handling these things see before they arrive at your doorstep.
True. I've had several bikes shipped to me. They've been "project" bikes so I disassembled them and built them back up from bare frames. I've checked derailleur hanger alignment on all of them.

Also, given your Lightning's long and contorted cable routing, I'd double check that the cable is moving freely through the housing. A little extra friction will cause the derailleur to hesitate when shifting into the small cog which could be the source of your hop.

FWIW: I bought my Lightning directly from the factory in 1991. Since I lived close by I didn't have to deal with shipping. It was a fun bike- now there's 4 recumbents in the garage. My wife and I appear in the old Lightning promotional video at about the 8 minute mark:
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Old 06-07-20, 05:14 AM
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Nice vintage video, and some interesting info as well. I would have liked to get the P38, but they were a little too pricey for me. It came down to this Phantom or a Barcchetta Giro.
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