SEPTEMBER 2022 UPDATE: I recently had my bike on the Dyno again (JULY 29th) at what is considered the best place in Florida by most professional tuners. (CYCLE RAMA) I was suspect of the first dyno tune because I was not allowed to witness it and it was over in about 1.5 hours. I knew that did not seem correct. This session took about 3.5 hours and the Tuner worked his butt off. This session was at 105 degrees! 2 degrees hotter than last year! OBVIOUSLY, motors do NOT make their best power at these temps. 59 degrees at sea level and 29.92 barometric pressure is considered the best condition for best power. Having said that, the first tuner used a lot of throttle "acceleration" to make the throttle very snappy. It is kind of a false sense of power. This Tuner took that out and simply concentrated on tuning the Motor without "electronically cheating". The result was more power and torque and much sooner than before. 110 HP and 122.5 ft lbs of TQ The prior dyno sheet showed inflated HP compared to now, but no doubt it is false as evidenced by this PRIOR tuning #'s. The first run with no tuning was 100 HP and 106.5 TQ. The curve is substantially improved, with 100 ft lbs of TQ by 2500 rpm and 122 by 2900 rpm.
Don't get me wrong, the bike a ton of power before, but the power band was not as smooth as I knew it could be. There was also small decel backfires which I was not happy with. Also bear in mind, my exhaust system has a CAT AND A BAFFLE (sound reducer) which both cut down PEAK #'s. With temps in the 70's or the 80's there would easily be a 5-10 # increase across the board. Without the cat and baffle there would be an additional few ponies at the TOP.....but the power band would suffer in low and mid range.
SUMMARY: Was it worth the 500 bucks and trip to Tampa? YES it was!! The motor is much smoother at ALL rpm ranges. The idle is not as choppy as before, but still has a mean powerful idle. The throttle response is still fantastic, and the mileage seems to be a tad better. The motor feels and sounds very happy...and there is zero backfires. When you get after it....the increased power is VERY noticeable. The roll on power is much improved as evidenced when I ride with my friend with a low rider. I shoot away from him easily with just a little throttle. How often do I ride at 5K or over? Almost NEVER. Why? Because I do not have to ! I can run away from most never going past 3-4K. However, when you get after it....the big power is there and screams to 6k effortlessly. This shows how much difference a GOOD Tuner makes to ANY combination of parts. I am now 100% happy with the performance of my M8.......Gene :)
Cam, Cylinder Head and Transmission "breather mods" review.
Once again, the phone picks up about 5% of the sound. The cam is actually shaking the floor and is MUCH louder!
PROPS to Ron's Workshop Channel for the info on the Trans Vent. • M8 Crankcase Venting •... (Great Channel)
The differences that I did are: I did not use a check valve. I used 1/4" fitting and hose instead of 3/16". I also kept my breather filter up high above the battery rather than drop it low.
UPDATE: I went for a little road trip today to Daytona Beach. Temps were in the low to mid 80's. (NICE!) Total distance about 240 miles. I filled up twice.....but checked the mileage once on the way down. I rode the off Interstate highways and also US1 and A1A along the coast. A perfect mix of higher speeds 60-90+ , going through towns 0-45 and stop and go in lots of traffic. I did not try to save fuel.....just enjoyed the bike and played with the power. At fill-up, I rode 114 miles and used 2.5 gallons of gas. (93 octane) That is 45.6 mpg by my calculator! Tons of power and excellent mileage as well. That speaks well for the cam design and tune :)
26 июл 2024
