Do you have the International 61 tooth rear sprocket or the US 70 tooth one? I used to get 57 MPG on the Hiway with my '87 FXLR. Python II pipes, EV27 cam, Stock 38mm Keihin with pre '77 accelerator pump kit installed and the 61 tooth rear sprocket. Ran about 2,600RPM @ 70mph.
For sct100
I like the spyder just fine but I have had to space the fender out so that it did not rub on the tire. Flying the chair, (read showing off) pounds the fender down into the tire and has bent the fender bracket. To anyone that has one and has not yet mounted it. You will likely want to shorten the male slider to pull the hack in close to the bike. I took 5 1/2 inches out of mine. Do not poound the slider into the female slider past the cut in the tubing. You'll have a hell of a time backing it out.
Sam
for sidecarlenny
My experience with Mikuni's for Harleys is that the power goes up and the mileage goes down, way down. The S&S I used didn't change the mileage at all. Of course all this depends on the size carb and how much time you take jetting the thing.
Adding a extra fuel supply to fuel injected Harleys can be easy. There are several different gas tanks that I know of. One of them (I think 02-03)has two fuel bungs and one is capped off. We added a fuel tank and a pump into a friends right saddle bag for the Iron Butt and plumbed the fuel line into the tapped off (unused) bung. Worked great. But not all injected engines have this blanked off.
HI guys just got home and saw the new post.
THIS IS FOR HACK'N
I have the 70 tooth rear sprocket.
Did you put that pre77 accelerator kit on your 87 FXLR ?
sebjones
Thanks for the heads-up on decreased mileage on the mikuni.
For HACK'N again
Regards to your 87 FXLR was that a solo rider?
If so, what % decrease gas mileage would you expect if you added a sidecar.
I understand that would be a rough estimate.
The pre '77 pump kit is available from Gary Bang complete with instructions. One small hole will have to be drilled. It's a quicky job that will get rid of the flat spot off idle and won't cause any significant difference in mileage as long as you are smooth on the throttle (Not a throttle Jockey).
The 61 tooth sprocket and matching belt is like a 13% overdrive. The big twins have plenty of torque to pull it with a sidehack attached.
The long figures were as a solo. With sidecars mounted it got about 45mpg with a 562 attached and a little less than that with a Sputnik III. Both sidecars had windshields and the bike had either none or an Arlen Ness fairing.
