Should i wait for the break in period to dyno? Will I see a great difference in preformance when I install the DTT ignition I have?

 

My HD dealer said they would dyno my bike once I put 1,000 miles on it and not before. I have seen some people in this forum say 500 miles is enough on a new engine but you have to wonder if that's just because they're in a hurry to know how much power they make.

For my bike they were dyno tuning the new computer so it took a lot of dyno runs to complete this. That's a lot more than just 1 or 2 runs on the dyno to see how much power it made and maybe the reason why they made me wait 1,000 miles.

Maybe you should talk to they guys at the dyno and see if they have any recommendations on how long to wait before having the new engine dynoed. You just don't want the engine to sieze up.

 

It only takes about 50 miles to seat a set of new rings, matter of fact the first 25 mile windowto seat the rings are the most important. With todays materials in the pistons and cylinders, the barrel cut pistons, with moloy disulfide coating on the thrust surface you can be tuning on the dyno in 100 miles. Now I wouldn't say this if it where a Shovel head or and Iron Head because the materials used in those days would transferfrom the piston to the cylinder causing major damage.

Personally I think it is a much worse situation to run a bike on the road for a 1000 miles with the wrong AFR and timing....more damage is being done here than you think.

I've been dyno tuning for over 8 years now and building hi performance motors for many more years. After I do a build, I break the customers bike in for 75 to 100 miles and on the dyno she goes....the tuneis complete and I never had one come back with internal damage or even smoking. Again gentleman, it's all in the materials that are being used in todays motors that allow this to be done, it has nothing to do with my abilities.

In my opinion if you have 150 miles on the new top end and it is an EVO or newer you're ready to tune with a competent tuner.

 

I agree w/ Doc ~ 100%

Only thing I'd add is that I'd do a quick oil change and then schedule the tune!

 

Schedule your dyno time. It's ready to go.
As to what Doc mentioned about running it untuned for 1000 miles, I agree 100%.
We just saw a 110" come in and it had been in service for quite some time with a "dealer tune". The damn thing had run so hot, both exhaust valves were warped, and when we just touched the fuel line, it all but crumbled in our hands.