Thanks Jim / all for the considered replies. I have visitors this weekend and can't spend a lot of time in the garage so took the bike to Wally's Bicycle Works, the preferred LBS.
A little disheartening in that anyone not familiar with a standard Riv build has to work through the unfamiliar "Frankenstein" setup. Wally thinks the root of the problem may the BB or crank. BB is a Tange 68x107 not new but looked ok.He will replace that next week. He thinks the crank may have a little wobble from manufacture which could be but I wouldn't know the difference. Chainring bolts are tight and minor adjustments were made to limit screws and this morning the chain didn't fall off on the way in but I was very cautious though I rarely shift roughly. Sugino XD2 is brand new with less than 100 miles on it as are most of the components. I took my time assembling and torqued everything to spec. Greased crank arm bolts but not spindle. The main concern is on going chain suck. This frame may be prone to that since when purchased used (2001 / 2002 model) it had bad chain rash. That was repainted but I hemp twined it for the heck of it and it saved the chain stay from bare metal damage this time around. I am willing to replace the crank if that's what it takes. I googled "Atlantis chain suck" and found some folks had similar problems with this crank that were cured with a different setup. Any thoughts to what might be an upgrade BB / Crankset that would work with this bike? Thanks again. Bummed but riding. Mitch. On May 5, 8:12 pm, CycloFiend <[email protected]> wrote: > on 5/5/10 8:35 AM, Mitch Browne at [email protected] wrote: > > > Need advice. I finally put together my Atlantis and have been riding > > back and forth to work 16 miles RT for the past four weeks without > > issue and happily shifting very well. I am really enjoying fully using > > a useful triple. Bad news riding in this morning. The chain came off > > twice on both sides of the chainring low and high. This hasn't > > happened before. I was very careful in adjusting H and L limit screws > > when setting it up. It jammed pretty good at the chainstay but I had > > twined the chainstay at the small chainring so no rash yet. > > > The only thing unusual is that on the way home YESTERDAY one small > > hill I forgot to shift down on the front chainring and cross chained > > pretty good for a short bit until I figured out what was wrong. Could > > I have bent the cage? Forced the limit screws? > > Unless there's serious binding, cross-chaining really won't damage anything > directly. It will tend to flex your chain and weaken it prematurely. > > > The FD is the standard inexpensive Campy Mirage triple that Riv sells. > > Should I replace the derailer? I originally tried a Campy Chorus > > double but it didn't have the range though it seemed very stout. > > > The crank is the Riv Sugino XD2 Triple 172.5 and Tange 107 BB. > > Troubleshooting that problem: > > - Check for crankarm slop. Brace bicycle and see if there is lateral > movement in the arms. (loose bb, loose arms on spindle.). Check chainring > bolts. > > - Eyeball setup on FD. Not uncommon for them to slip slightly both in the > vertical direction and by twisting around the seat tube. > > - Chain length as others have mentioned. I've never run a chain without at > least removing several links, so I suspect you may have some issue there, > regardless. > > - Housing, cables, ferrules, fixing bolt. Always a possibility of movement, > play, seating in or reseating the ferrules. Cables don't "stretch", but they > can be devious in maintaining slack, and the fixing bolt can move if not > torqued properly. > > - Limit screws can definitely vibrate and move. If you have consistent > problems with that, a tiny dot of blue Loctite works. > > As others have said, there's not much you can do to a front derailleur that > isn't really obvious. High and low throwing of the chain would point me > towards the chain length, but definitely work through the other variables, > too. > > Hope that helps, > > - Jim > > -- > Jim Edgar > [email protected] > > Cyclofiend Bicycle Photo Galleries -http://www.cyclofiend.com > Current Classics - Cross Bikes > Singlespeed - Working Bikes > > Gallery updates now appear here -http://cyclofiend.blogspot.com > > "Nigel did some work for some of the other riders at Allied, onces who still > rode metal. He hadn't liked it when Chevette had gone for a paper frame." > -- William Gibson, "Virtual Light" > > -- > You received this message because you are subscribed to the Google Groups > "RBW Owners Bunch" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group > athttp://groups.google.com/group/rbw-owners-bunch?hl=en. -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
