1 - A healthy 185 can do a KHI to Khunjerab with smile (Given you don't red line it all the time and cruise it in her limits - she is old rememeber that)
2 - Basically if bike is healthy then only You will have to master in setting up its point system and its electricals or else it will become a fatal stop to you trip or cumbersome to maintain in a long journey.
3 - After balakot, it might need its carb re-adjusted to thinner air less oxygen and sheer climbs which will over heat the hell out of her so carb setting per hath seedha kerlain. (its common with every carby bike)
4 - It will not afford offroad hands down, its a cruiser you will end up abusing it and end up water filled in point system and engine not responding and also the road clearance will be bummer.. two person sitting on sofa seat of a roadmaster you notice only a handful of space is left below the engine...
Even the exhusts on both sides are straight not lifted like CG and will tend to suck water when you will pass throught streams...
5 - Spokes Rims are fine as long as you are on KKH nothing is a big issue... even 185 engine would be happy to do it, CB250 night hawk k engine wesay bhi expensive hai bohut or ilta bhi nahi.
ya phir chinese replica engine ligwa lo..
Advice# if you have kept a Road Master for a long time and you know it from the bottom of your heart and you know if it goes dead in the middle of the night in middle of no where and you would still be able to figure out whats gone wrong and you can work around it then go for it.
Pori bike 100% ho bhi tu teen baray maslay apko face kerna hon ***//
1 - Point system maintainece
2 - Carb maintaince
3 - Road Clearance
As you mention that you dream to do it
I would advise to buy one make short trips first get use to its major and routine works then try this big agenda.
Hope that helps.