So I just rode my bike 900 miles over a two day span. I have never checked the mpgs because I haven't had the bike too long. But on this trip was getting roughly 25-30 mpgs varying each fill up. Now I will say most of these miles were riding in no mans land on Nevada at 80-100mph. I was expecting a little better mileage but also at those speeds not sure if that's pretty standard or not.
Hmm I wonder what my issue is then. It's has stick coils. Recently cleaned carbs(still need to check their sync). Main jets were 120 I believe. Anyone know where I should start to try and improve this. Bike seems to run great. Starts right up and purrs at idle.
Tweeter what are you referring to with shoodabeen. I did do probably 100-150 miles at a more reasonable rate and easy accelerating and that was when I got 30mpg. The carbs we filling rebuilt and cleaned not long ago.
Steve has basically "written the book" on the Concours, both the C10 and since 2008 the C14. At the very least check out his website and his videos to see what he has to offer. I'm sure others will chime in also. His aftermarket work on the Concours is extensive.
Steve is a straight shooter. He may recommend his paid for services, but he won't complain one iota if you just ask for his advice.
That said, and given I've been here since before Jesus had measles, MPG for the C-10 is generally in the 38-42 mpg range. Less if you have a binary right hand (on-off-on-off-on...).
Normal riding I would get 42- 44 and my best ever mileage was 48.8 MPG When I held my bike at WOT all day at 135mph (no saddle bags or trunk) I got exactly 20mpg over and over again with the same bike. Your bike sounds about right.
I used to get 42-44 until one day it dropped to 32. Had a fouled plug because the well gasket was leaking and oil fouled the plug. Replaced the gasket and adjusted the valves and it went back up and stayed there. Lose 25% of your power and run the same speed, you get 75% of your gas mileage I guess.
I'll check the plugs. Just did 2000miles round trip and got mostly 25-30 mpgs but most of that was at very fast speeds. I did manage to get one fill at 38mpg when I rode through a bunch of construction and towns.
Ron Dawg I feel is on the right track. My previous bike was getting below normal MPG's and I'm easy on the throttle. Adjusted the valves and found one of them pretty stuck. After the adjustment, MPG's went up to what the bike normally is expected to get.
Probably not. I'd bet you have a well gasket that slipped when reinstalling. They have a big loop that seals the valve cover and well joint and a little one that sits on a pin on the underside of the cover so they stay put while you're messing with putting the cover back on.
I pinched one "just a little" one time and it leaked "just a little oil" in the plug well from a tiny tear or pinch that I could hardly see and it fouled that plug. After that, I never used the same well gaskets over but once. New ones were cheap insurance to me. But other people say they use them over and over. I'm ham fisted I guess.