Well in that case forget the name Royal Enfield. I cannot speak about the new UCE but the old ones would require a great deal of money to cruise at 70 and you'd better have shares in loctite..no better still lock wire or you will be back tracking to pick up half the bike in bits. 60mph even a bit more is achievable but 70 for 15 hours - I don't think so.
If I were you, I would try a Bullet first, try several, I think GC has the measure of the situation myself...
Steffan
Thanks for that. I appreciate that the older Enfields would not be suitable, but with a claimed top speed of 80 for the new UCE Bullet, cruising at 70 seems feasible. Not stressing the engine too much by being on the stop, yet able to keep up with traffic on the motorway, were my thoughts.
I'm keen to understand the nature of the pre UCE bikes, especially with regard to built quality, comfort, etc. It seems from what you're saying though, they are a little fragile and need a lot of looking after.
I appreciate singles shake a lot, and from experience, I use copious amounts of loctite on both the DR and the KTM. I must admit, the DR with it's balancer shaft, is a very smooth engine, unlike the KTM's LC4.
Looks like I'm destined to either keep the DR indefinitely or having to replace it with another too tall Japanese machine! Or maybe start looking closer at twins

Simon