valve clearance for CD70 engine is 0.08mm to 0.10mm
adjusting valves of bikes needs some experience & good knowledge
i won't recommend your friend to try adjusting his bike valves himself
rather i recommend him to take his bike to honda antenna dealer or also
called warranty claim center there must be honda trained mechanic he should
get his bike tuned from there
CD Dream should give average what CD70 gives 80km/lt
i with my friend had tested 2013 CD70 fuel average it had given
us 83km/lt at speed 40-45km/lt on highway