Do I really have to take the front sprocket off?
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XS650SH left me stranded again
- Thread starter jetmechmarty
- Start date
Can't see why?
That chain guard under the sprocket. I had to take the chain off.
It runs again. I’ll finish reassembling tomorrow evening.
Glad I suggested that. I've seen it on a few bikes over the years.
Yes, a good one.
Question from me now is - When all the near 50 year old pick ups have gone faulty, what happens then? There's a Gonzo unit to replace the TCI box. But as far as I'm aware, there's no new pick up available.
Apologies in advance, that's a whole new thread topic.
Didn't mean to sound snippy.
Didn't mean to sound snippy. I was thinking the wires ran under the chain guard. Oh well, good opportunity to check sprocket nut torque. Glad you're running. Very entertaining thread.
Bob Wegman
XS650 Addict
Question from me now is - When all the near 50 year old pick ups have gone faulty, what happens then? There's a Gonzo unit to replace the TCI box. But as far as I'm aware, there's no new pick up available.
I guess Jim will have to start rewiring those too, along with the rotors.
I guess Jim will have to start rewiring those too, along with the rotors.
Just what I was thinking Bob.Question from me now is - When all the near 50 year old pick ups have gone faulty, what happens then? There's a Gonzo unit to replace the TCI box. But as far as I'm aware, there's no new pick up available.
I guess Jim will have to start rewiring those too, along with the rotors.
Still lots of these out there. While they do have a finite life so good ones will be harder to find. By then, Ai and a holographic-multi-media printer, no worries.
While we're here. Fairly simple magnetic pickup/trigger. What other bikes/weedeaters might be compatible with the yamaha tci? Apologies in advance.
When you get the old one off dissect the harness where it passes under the sprocket I'll bet you find a near broken in two pick up wire there.
Nope! The outer sleeve is broken in one spot aft of the sprocket. The wires inside are clean and untouched. I only applied heat to the module itself and the stator frame to induce failure. It didn’t take very much heat.
I had the same failure a very long time ago. The used spare came from 650 Central right after it was passed from John Zelna and before it was in the hands of Michael Morse. It wasn’t easy to find back then. That may have been as long as 25 years ago.
AFAIK, the twin pickup * design is unique (or almost so) to the XS650 TCI ignition. I can't think it's impossible to mount two modern pick ups in a custom mount to replicate the original. I don't know of a ready made modern equivalent. But anyway I understand the spacing between the pick up coils is critical in the TCI ignition advance/retard function.
* Claude AI says they're very likely inductive coil pick ups.
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Everybody buys a Boyer-Bransden ignition unit.
Arguably it's an inferior choice to fit to a TCI equipped bike though.
I tend to believe the stock TCI XS650 ignition is superior to anything else, price considered. It’s extremely robust.
A single pickup can be used with the GN250 TCI box.
Agreed on both points.
Good stuff guys. Thanks
My clutch is way out of adjustment, but I warmed it up and rode it down the street and back. It’s loaded on the truck. Off to VYR early in the morning.
Safe travels, Marty. I'm going to miss the VYR this year. Leaving early Saturday morning for a British Car Gathering in Hiawassee.
