I don't claim to be a mechanical genius but I have enjoyed puttering around with my bikes over the years and I usually purchase a shop/service manual for each of them. When I bought my TW200, I found a "Cyclepedia Service Manual" for it that really helped make a lot of things clear and I found myself wishing such a guide existed for the Trail 125. I already have the official Helm publication and, yes, it's useful but I was hoping for more so I called up the publication office for Cyclepedia and asked if they were going to publish a manual for our bikes. Talked to a really nice guy named "Greg" (IIRC) who explained how they generate these guides by acquiring a specific bike, totally disassembling it part by part, photographing each step and having a tech writer narrate the entire process. Then the mechanic re-assembles the bike using the narrative as a guide to make sure everything is accurate and clear. He said they would like to produce such a manual for the Trail 125 but have not yet acquired one and didn't know when that would happen -- hopefully in the near future. Just thought you might be interested.