I have a 2018 RE C5 500cc classic with their "modern" (at the time) UCE engine ( Unit Construction Engine ), being a mild tuned 500 single it is a plodder, but it so reminds me of the BSA singles that I rode in the 70's. It will plod along all day at 50 to 60 mph on A roads with just a hint of vibes through the bars. Build quality is actually very good, way better that the quality of Brit bikes from the 70's. Its electric start and on my model it still has a kick start, fuel supply is by injection plus it has hydraulic valve lifters, it starts on the button and settles to a low RPM thump thump thump. I have fitted RE's own low rider seat, so only a single seat M/cycle. It now has UK Hagon rear shocks which were set up to my body weight and it has a Hitchcocks ( UK RE dealer of a very long time ) rear silencer, the engine is rated as Euro 4 and its mini cat is just before the silencer in the downpipe, so I have been able to change the silencer for a UK one which gives it a nice deep tone with just a hint of bark and then twitter on the over run, but its not too loud.. All in all its a great bike for a nice relaxed ride over the hills on A and B roads.. I have thought of upgrading to their 650 twin, but in honestly I like riding the C5 so much its a bit of a keeper... and I still have my prewar BSA singles and 60's and 70's bonnies if I want the real experience..