Charles, A couple of things to check, that you can do yourself. 1 - Make sure the cable is tensioned correctly. If it has stretched over time the shift position indicator may not be on target, so that position 3 or 4 is actually just shy of the ring. This can cause the chain to catch on the next ring and attempt to shift, but fail. While you are pedaling, use the threaded adjuster (at the shifter) to tighten it or loosen it just a bit. You'll hear if the chain gets better; if worse, go the other direction. If the cable adjuster is already at its limit, you'll have to shorten the cable at the dérailleur end. 2 - Make sure the chain and drive path are clean, including the dérailleur pivots. Dirt here can cause the above condition without a loose cable, and a dirty or rusty chain can cause kinking. 3 - Chains stretch and sprockets wear, but you said
you took care of that already. I think #1 will help. Patience!
--- On Wed, 6/24/09, Bicycle Minden <bicycle.minden@...> wrote:
From: Bicycle Minden <bicycle.minden@...> Subject: [TeamCatrike] Expedition drivetrain problems To: TeamCatrike@yahoogroups.com Date: Wednesday, June 24, 2009, 3:30 PM
I bought an Expedition about a year ago and have most of the bugs worked out except for a persistant drivetrain problem. The chain jumps on the rear sprocket on several of the gears. This problem persists even though I put on a new SRAM chain [after the original brike 2x in less than 6 months] that's one continuous piece except for the quick link. New rear sprocket, different rear shifter. Doesn't matter which front ring I'm in but I notice it mainly on gears 3 & 4 [counting from the smallest rear ring]. It's about to drive me nuts and my LBS mechanic thinks I am crazy.
Charles Rathbun
~~~~~~~~~~~~ ~~~~~ "It's a
beautiful day out there. What are you doing inside? Turn off the computer and GO RIDE YOUR BIKE!"
I bought an Expedition about a year ago and have most of the bugs worked out except for a persistant drivetrain problem. The chain jumps on the rear sprocket...
Charles, A couple of things to check, that you can do yourself. 1 - Make sure the cable is tensioned correctly. If it has stretched over time the shift...
... Charles, I just got back from a long ride and fiddle session.....Tightened the cable at the derailleur one click at a time rode a few miles, fiddled some...
... Charles, I just got back from a long ride and fiddle session.....Tightened the cable at the derailleur one click at a time rode a few miles, fiddled some...
... Charles, I just got back from a long ride and fiddle session.....Tightened the cable at the derailleur one click at a time rode a few miles, fiddled some...
... Charles, I just got back from a long ride and fiddle session.....Tightened the cable at the derailleur one click at a time rode a few miles, fiddled some...
brane new cable installed when busted right shifter replaced less than a week ago. Rode it 2 days after this was done...still jumping in the same places. ...
it HAD a KDS chain to begin with I think and it broke 2x in the first 6 months although I an very meticulous on cleaning and lubing the drivetrain Charles...
Does this, by chance, happen when you are cornering or going over bumps? I've had trouble with my trike (NOT a catrike, however) and several other recumbents...
not really...most of the time it's on straight runs and more often than not when I'm "under load" going up an incline Charles Rathbun ~~~~~~~~~~~~~~~~~ "It's a...
You know when I think about it I had a similar issue the chain was to long for the amount the boom was out. What I discovered as I had inadvertently not moved...
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