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Really depends on how long you want the motor to last. The earliest for a street motor would be as soon as you got the break in oil out of it. I wouldnt bounce it off the limiter until then.
The only "thrashing" to a motorcycle on a dyno is to the drivetrain and that is minimal. A person does more damage to any motor, when they rev the free-wheeling motor for no other reason than to be heard. Any motor on a dynometer is measured under a specific "load". Most motorcycle shops, with dynos, take a baseline reading before any mods are done to any part of the bike. That is mostly done for the curiousity of the owner and to show the customer what they received for their money spent on the mods. Anytime after the first oil change of a new motor is fine.
The only "thrashing" to a motorcycle on a dyno is to the drivetrain and that is minimal. A person does more damage to any motor, when they rev the free-wheeling motor for no other reason than to be heard. Any motor on a dynometer is measured under a specific "load". Most motorcycle shops, with dynos, take a baseline reading before any mods are done to any part of the bike. That is mostly done for the curiousity of the owner and to show the customer what they received for their money spent on the mods. Anytime after the first oil change of a new motor is fine.
I don't thrash my engine when I rev. I have a rev meter that helps prevent that from happening.
I had mine dyno tuned after riding it around the block. Waiting 500-1000 miles is not necessary. In fact why would you want to ride it 500-1000 miles with a questionable air fuel ratio? (new bike AFR isnt a concern) That could do worse damage.
My engine was my first "Harley" engine build. When it was done, I asked my head guy what to do next. He recommended I call a local tuner and get it dialed in. I called the tuner and asked them what they recommended. They told me ride it around the block a couple times and make sure its nice and sound....No noises. Then bring it in and we will take care of the rest.
I asked them what they recommend after they tuned it, they said ride it normal.
I have seen 300+ HP turbo Hayabusa engines built, installed and straight to the dyno. Those engines turn way more RPM than our bikes!
In short, mine had about 5 miles on it before the dyno tune, changed the oil when I got it home...It runs great!
Last edited by redrubicon2004; Nov 3, 2009 at 06:42 AM.
I agree. On my 117" build it was dyno'd immediately.
Originally Posted by redrubicon2004
I had mine dyno tuned after riding it around the block. Waiting 500-1000 miles is not necessary. In fact why would you want to ride it 500-1000 miles with a questionable air fuel ratio? (new bike AFR isnt a concern) That could do worse damage.
My engine was my first "Harley" engine build. When it was done, I asked my head guy what to do next. He recommended I call a local tuner and get it dialed in. I called the tuner and asked them what they recommended. They told me ride it around the block a couple times and make sure its nice and sound....No noises. Then bring it in and we will take care of the rest.
I asked them what they recommend after they tuned it, they said ride it normal.
I have seen 300+ HP turbo Hayabusa engines built, installed and straight to the dyno. Those engines turn way more RPM than our bikes!
In short, mine had about 5 miles on it before the dyno tune, changed the oil when I got it home...It runs great!
i waited till 1000 mile service. friend works for a dealer and he recommended wait till after the service. but this comes from the same dealer who sells stage 1 bikes off the show room floor with race tuners. so that would leave me to believe they dyno them with zero miles. i guess what iam trying to say is who knows
As we all know, when a bike is dyno tuned it gets a little thrashed.
After the 500 mile break in period, what is the minimum mileage you would have a Dyna dyno tuned ?
Regards.
Hi from England! I had a new S&S motor fitted last year and waited until it had 1,500 miles up before having some fine tuning done on the dyno, but the tuner didn't run it to peak rpm, in deference to its short life. I plan a further run and some mild tuning next year, when it will have around 10k miles up.
If you are having tuning work done by a professional builder, go by his recommendations. He will build your bike and give you running-in instructions, ditto regarding any dyno work. If you have a brand new bike and are thinking of doing the work yourself, consider your warranty!
What are you planning to do?
Last edited by grbrown; Nov 4, 2009 at 04:45 AM.
Reason: Grammar
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