HI,

Got a new bike recently and adjusted the gears today for the first time, it was a shop floor bike, not new in box. Ive not had it out a ride yet. Was doing first adjustments today, gears, new grips, saddle adjustments, oiling chain etc.Anyway its a claud butler cape wrath 04 29er with 27 gears.So I got the all the gears working fine without rubbing front derailer, but my problem is when I go into 2nd or 1st gear ( biggest front sprocket and 2nd and 1st biggest rear sprocket) the chain comes off the bottom jockey wheel on the rear derailer. Its as if the rear jockey wheel is not adjusting to the chain going from left to right properly, if that makes sense, as in these two particular gears that is when there is the most lateral distance between the rear and front gears. Im not sure what I need to do to fix this issue, can anyone offer some advice.

Any help will be apprecited.

I didn't find the right solution from the Internet.

References:
https://www.bikeradar.com/forums/viewto … t=13033119
POS Solution Video Example

Thank you.