Heat cycling a new engine

[Deye76]

Now that we have the engine question answered.. how about those tires.. Have you broke them in yet?    Yes, there is a breakin period for tires, first 100 miles take it easy! 

If you want to talk tires, start a new thread.  OP was asking about motor heat cycling, not tires.

I thought he was joking  least that's how I took it.

[rbabos]

Now that we have the engine question answered.. how about those tires.. Have you broke them in yet?    Yes, there is a breakin period for tires, first 100 miles take it easy! 

If you want to talk tires, start a new thread.  OP was asking about motor heat cycling, not tires.

I thought he was joking  least that's how I took it.

Technically he's correct, but don't apply here.
Ron

[hd06myway]

Now that we have the engine question answered.. how about those tires.. Have you broke them in yet?    Yes, there is a breakin period for tires, first 100 miles take it easy! 

If you want to talk tires, start a new thread.  OP was asking about motor heat cycling, not tires.

I was just making light, but there is a breakin period with tires... but that's another thread somewhere else... 

[les]

I have a few questions about break in of the rings.

1) Can excessive heat on the edges of the rings cause damage or longevity problems?
2) Do the ring edges build more heat on a new engine than one that's been ridden for 100 miles, or so?
3) Does higher RPM result in higher ring temperatures due to friction?

[rbabos]

I have a few questions about break in of the rings.

1) Can excessive heat on the edges of the rings cause damage or longevity problems?
2) Do the ring edges build more heat on a new engine than one that's been ridden for 100 miles, or so?
3) Does higher RPM result in higher ring temperatures due to friction?

Yes to all the above. Ring land damage and microwelding from the high heat as well.
Ron

[les]

The physics of that makes sense to me too.  So, what's the best way to prevent this?  Is it to heat cycle and conduct break in rides for a reasonable time?  Or, is it to fire the new engine up and ride the hell out of it from the get go?  I'm trying to look at this from a logical, mechanical, and physical perspective.

[Dennis The Menace]

Its winter, so you have some time to read, right?  http://mototuneusa.com/break_in_secrets.htm

It has to do with getting the right temp and pressure to set the rings, and to wear the hone properly of the cylinder.  Not too much, and not too little.  The hone of the cylinder is key to long life of the rings and the role they play in oil control and cylinder pressure.

[les]

Thank you very much for the link.  I've read his writings before.  It's interesting that honing techniques have changed.  I'm thinking that perhaps stone has recently changed.

[RK101]

If you've ever been to the York Plant you'd see how those 4 miles got on there. They run the bikes on rollers up to about 60/70 mph. They do all the dignostic checks on it at the time.
When I got my roadking I just road it like I'd normally ride it. I didn't beat it nor did I baby it. However I kept the trips short at first and under 60 MPH for the first 100 miles.. . What I did do was change my oil and filter in all three holes the first 100, 500, and 1000 miles. At the 1000 miles I started using Mobil one 20/50 and Purolar oil filters. That was back in 04 and to this day the bikes motor,primary, or trans has never had an oil related problem, nor have the cases been opened. If I was to buy another bike I'd do exactly the same thing, as I'm a big believer in doing new bikes oil changes early and often. Then every 3000 miles.  I've broken in three new Harley's the same way except the first two I remained using the HD dino oil for as long as I owned those two bikes. Congrats on the new bike.

[HarleyHiwayMan]

I bought 2 2011's and won a 2012. All three were ridden as I always ride, out of the gate from mile 4 (4 on when I bought). I changed the fluids the first time at 1000 miles. All run perfect, don't use fluids. The Road King Classic is 22 months old and has 47,700 miles, while the other two have many less miles. 6600 on the Street Bob, 3000 on the 2012 Forty Eight. I'd see no reason to baby or beat the hell out of the bikes, and see no need to dump out good fluids before 1000 miles.

[05FLHTC]

Good night nurse you all take the enjoyment right out of a new purchase for christ sake!

Just ride the thing enjoy & change the oil, this ain't yr Dads HD.

It's covered for 2 yrs so if it's got any flaws find em pronto, don't baby it along until the 2 yrs are up.

Don't lug now or ever enjoy & most important enjoy 

Did I say ENJOY