Steven,
Us Harley guys like to play with our engines just like us Honda guys do.
2003 Fat Boy injected. Was 58hp (dyno specs before) at 88ci. Altitude 6480 ft. Now 84hp/94ftlb at 95ci, cam, intake and exhaust mods, race tuner module and dyno set up.
Have fun but don't make a bet!
88ci. to make 58hp is really very pathetic. 88ci. = 1442cc or like the equivalent to 2.88 CB500's, or 2.62 CB550's, or 1.92 CB750's
Even at 95ci, it's 1940's technology at work, trying to keep up with the rest of the world. 
Yeah Steve F, my stock 2001 Fat Boy got rather anemic at 105mph but it took a damn good head on collision.
They put the stock counter balanced Porsche 1450cc engine together for 2 reasons: (1) low HP = more longevity and good fuel mileage (~60-65 mpg) and (2) to sell more engine parts after we bought the bike.
Luckily the insurance company was happy to settle how I wanted so the engine work on my 2003 was pretty much gratis. Granted, I'm pushing 84 non stock HP and 94ftlb of torque versus a 69/70 750K, a 77/78 750K or a 75/76 750F of 67HP and perhaps 45ftlbs of torque or a mid model 750K of maybe 45HP but the Fat Boy ran like a scalded ass monkey through the Nevada desert at 90mph and 3400rpm all day long 8/17 without a hiccup. Now that would translate into almost 7000rpm on my 750 which I definitely would not do
all day due to such things as over heating, head gasket leakage, and excessive vibration (yes, more on the 750). Plus I care for my one owner 33 year old Honda too much to abuse it like that!
Just don't understand why some guys lump all Harleys/Harley riders together. I don't hear anyone belittling Honda riders on here, not even from us Honda AND Harley riders. Us 810 and above riders don't slam the Honda guys that ride the little 500/550 scooters.
(post edit with the emoticon) We're all RIDERS, get over it or get on with your lives.
Hey Ichiban,
I have the 810 tuned in fairly well but when I put it together the last of 3 times I couldn't afford such luxuries as a ported head, bigger jugs, lighter/stronger rods, CR31 carbs, etc. I think a lot of guys can't afford to do much to their ONE bike let alone own 2 or 3. I'd love to fine tune it on a dyno before I make it right with all the above mentioned goodies and the 900 kit just to see where it's truely at. It's kinda hard to compare the 2 bikes without a side by side. 2 totally different beasts. The 810 would have taken my stock 2001 Harley but I wouldn't bet on it taking my 2003. The 200lb weight difference is significant. The 810 really starts to shine above 6500rpm and once it gets above that you don't have time to watch the tach - it's up to 10000rpm in an instant and you'd better know how to shift by sound. However it doesn't have anywhere near the grunt before that whereas the Harley pulls real hard up until it's 6200rpm rev limiter. If you rode over 45mph
I'd let you ride it with me on the Harley. Ha ha.
Jerry
