6
5. 50–100 Miles: Ride normally, do not lug the engine. Avoid high
heat conditions, no stop and go trac or extended idle periods.
Limited short bursts of throttle can aid in ring seating from this
point forward during the break-in, but avoid continuous high
speed or load conditions. Max of 4,250 RPM/70 MPH.
6. 100–500 Miles: Avoid lugging the engine and high heat conditions.
Max of 5,000 RPM. Change oil at 500 miles.
7. 500–1,000 miles: Ride bike normally, but avoid continuous high
load operation and high heat conditions.
8. From 1,000 miles on: Break-in is complete, enjoy!
NOTES FOR COMPLETING INITIAL 50 MILE BREAK-IN AND INITIAL
TUNING ON A CHASSIS DYNO
• When running the bike on the dyno it is critical that engine
temperatures are monitored, AFR is kept between 12.5–14.7
and the engine is not overheated. Fans must be used to
keep the engine cool. When tuning under higher loads stop
regularly and allow the engine to cool.
• A load must be placed on the engine to properly seat the rings.
Running a new engine continually with no load will result in cylinder
glazing and poor ring seal. The engine should be loaded to simulate
close to the weight of the bike, a load of 10–15% on a Dyno jet 250i is
usually sucient. It is not recommended to use an inertia only dyno to
break-in an engine as no load can be placed on the engine.
• Initial tuning on the engine can be completed during the initial 50
miles of dyno break-in. It is recommended the engine be run on the
street for a minimum of 500 miles prior to completing tuning at full
power. Monitor engine temperature during tuning to ensure the
engine is not overheated.
DYNO BREAKIN PROCEDURE FIRST 50 MILES
1. Follow the same procedure outlined above for initial start-up and
heat cycling the engine.
2. Run the bike for 25 miles on the dyno under varying speeds and
loads while going up and down through the gears. Keep engine
RPM below 3,500 RPM but do not lug the engine. The dyno must
be operated so the engine runs under a load roughly equal to the
power needed to move the bike down the road, this would be
about 12 hp at 55 MPH. Keep engine head temperatures below
200°F at the temp sensor or surface of the head. Stop and cool the
engine if needed.
3. Allow the engine to cool down to room temperature.
4. Run the bike for 25 more miles (50 miles total) under varying
speeds, loads, gears as before. Make sure there is some load on
the engine. Keep engine speed below 4,250 RPM but do not lug
the engine. Limited short bursts of throttle can aid in ring seating
as long as the calibration/tune keeps the AFR in control. Keep
engine head temperatures below 225°F at the temp sensor or
surface of the head.
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