Join Date: Sep 2011
Thanked 258 Times in 197 Posts
Well, my estimation of the amount of gas we used last time out was way off.
Turns out I only added 1 gallon of premix to the tank to fill it for the 65 miles we rode - so that's easy - 65 mpg. I was expecting half that.
Pretty surprising, as it's running 8000 to 9000 most of the time, with frequent spirts over 10,000. The stock carb was a 14mm, the flatslide is a 24mm.
I just got a 15T countershaft (EDIT: +1 tooth to drop some revs) sprocket to try when we get a chance. Looked at the plug color from the last time out, and it was medium-tan - almost perfect.
Had it out again tonight for about an hour or so, and it's a bit rich on top. Ambient temps are up about 15 degrees from the last time out, and the jetting needs to be leaned to match the reduced air density.
EDIT: Went to the 170 main jet (down from 175) and it pulls cleaner on top now. It will cruise at almost 70 reasonably well and not at WOT.
Last edited by jkv357; 08-13-2015 at 10:21 AM.