Thank you Satinderji.Hire agents to do such train bike work which you have considered a tough job.
You need these agents only.
They will quote you an amount which may seem more but only way out is this to get things done easily.
We have dedicated section of Bike Transportation on train and you can get info on google also.
Small Railway Stations also have agents and agents are more friendly.
Big city agents are not friendly but do their job anyhow after some chasing.
Prefer small stations to start and end if possible.
Avoid Big City Stations.
Instead of Delhi try for Haridwar / Dehradoon direct train and train should be one only. No changing of trains.
I did the same thing and learnt the same lessons. The saga will reflect in the travelogue at the appropriate chronological place.