This post is not about how much fuel you wish to use but more about how well the engine is using it. Also the following MPG numbers are only for town work, London traffic, as this is mostly what I am doing at the moment
. I will try a run later to see what happens.With the bike STD I used to get 43 mpg using STD 95 RON fuel. At 5K I fitted a Remus can, Remus Powerizer, K&N air filter and moded the airbox. This, with 95 RON fuel, cut the MPG to 38. At about 10K I then tried 97 RON fuel and the bike run better, but not perfect, and the MPG went up to 42.
Now that the Earth problems, that had effected the ECM and starting, have been sorted the bike is now giving an average of 43 mpg and runs as smooth as a nut. That was over 2 tanks, 300 miles and the last tank gave 148.7 miles with more than 1L left. Very good IMO given that aftermarket cans and wot-not do tend to cut MPG.
Some of this is due to fact that I can now just "ride the torque" and need to use less revs/clutch slip to control the engine because it was fecking about before. Massive power and torque across the whole rev range, no flat spots, no poping and no ECM map changes. I also suspect that using 97 RON fuel will be even better
.The point of this post is that the Thunderstorm engine can "walk-the-walk" it just needs a bit of thought and TLC to get the best from it. As it is I am amazed at what it can do given its "model-T" era base design.
