Gee, I'd want to ask was it 40 or 45, big diff, I get that kind of spread only when I run mostly city,, and then mostly highway, otherwise I stay with-in 1 mpg...
Then I would say, 35 is mighty low for a mostly stock sickle... Jetted properly you should get about what you started with even with more power---more efficiency more mileage...
Take charge of this and figure it out yourself by doing a plug run...
Get up to highway speed and retain constant speed for about 10 miles... Then in one motion, pull in(dis-engage)the clutch and turn the switch off, then coast safe to stop using only brakes... Gloves on, plugs out, and look at color of porcelin and tip... If your poor mileage is due to over-rich jetting, plugs will be very dark-to-black... I like light-brown/brown or med-gray... On way home, take frontage road or slow lane at sustained low speed,, 40ish, 10 or more miles, don't lug, and repeat same test...
How is your timing,? improper timing (rate of advance too fast AND/OR too much advance) will screw power, mileage, efficiency, and carb tuning, make sure it's correct before carb tuning...
Posted by: frisco-rigid on Apr 23, 07 12:05:37 am  | 
Linear Mode
