Has anyone changed the gearing?

[Django]

As soon as I get my 19/35 combo from 7GD, I'll be posting my results. I don't expect any problem off the line, only a great reduction at hwy speeds 4,000 will become 3,401. The 14 models do 3300 @ 70. I also expect hwy mpg (@70mph) to go from 43.5 to apx 50. The 3.9G tank will then be matched to performance correctly - IMHO without the need for a 4.4G tank upgrade.

It's a common misunderstanding, that lower revs would mean better mpg in every case.

A petrol engine has its best fuel economy at revs at max. torque, which is 5,500 rpm for our CB.

That means, doing exactly the same speed in the same gear at 3,300 instead of 4,000 will reduce mpg. But luckily not much or noticable, as our motor has a very flat torque characteristic.

For the details: https://en.wikipedia.org/wiki/Engine_eff...29_engines

Cited: "Engine efficiency peaks in most applications at around 75% of rated engine power, which is also the range of greatest engine torque (e.g. in most modern passenger automobile engines with a redline of about 6,000 RPM, maximum torque is obtained at about 4,500 RPM, and maximum engine power is obtained at about 6,000 RPM). At all other combinations of engine speed and torque, the thermal efficiency is less than this maximum."