How Do Rings Bed In?

[more_fasterer]

Very good point there Ocean1 about the oil temp.

You get a similar flat drone from the V4 - I like employing "excessive or unnecessary acceleration" just so I can decelerate excessively to hear that noise.
But the howl at >8000 rpm when the Satantune's got the spud out lifts the hairs on the back of your neck in a way a v-twin doesn't.

[smoky]

A new engine from a shop will already be prepped ready to go – ride it – by the time you get use to it and want to start pushing the motor it will be ‘bed in’. Just avoid labouring it (being in too lower gear)

If you however rebuild your own engine this is my approach; (haven't done it in years)
First time I fire it up – I give about 2000 RPM watching the oil pressure light (fit a gauge if you can) – checking temperatures and for any fluid/oil leaks – for about 20 minutes. Shut off and change the oil, reset tolerances – valving, check static timing, head bolts/nuts torque – bla bla. Then run up to idle and tune.

Take it for a blast – get it nice and hot driving it hard (not valve bouncing or anything) – a good windy hill road opening it right up, load the engine up a bit. Depending on the engine I have run hotter plugs while doing this.
Getting it hot and loading it up will burn the glaze off the cylinders and everything will ‘seat’ and bed in – 300 ks’ should do it.
Repeat the oil change and valve adjustments
Real fussy dudes worry about running up a new engine on un lubed valve springs, or a non ‘work-hardened’ cam and will often use a lighter set for run in and then replace them after 300 ks or so – never been that fussy myself.

[007XX]

Sorry for going:

You need a set of my custom and highly illegal twin open megaphones on that little VTR.

Like these that I prepared earlier
http://www.kiwibiker.co.nz/forums/sh...postcount=1852

http://www.kiwibiker.co.nz/forums/sh...82&postcount=9

I thought it was pretty awesome just revvin it wild in the driveway, but the first time I shut the throttle at 11 grand ohhh....

A v-twin with these would just be da bomb, and probably much louder than one!

Warning, these exhausts render the noise dampening effects of earplugs to levels were the earplugs need earplugs!

And what makes you think my little VTR hasn't got after market pipes on already, Oh Wrongly Assuming One?

Ask anyone who's ridden with me before...my girl sounds Reeeaaaaall good

[007XX]

I didn't, she was "pre-loved".

But yes, as I said I've used that general principle for longer than he's been publicising it. I am a tad more concious of oil temp with a new engine though, some are easy to overheat for a while...

Indeed...i could be wrong, but I was told this was especially an issue with Triumphs, they definitely do not like to overheat.

This was also a reason for my questions, as I am very tempted by a 675 Daytona...Mind you, if I was to buy myself such a little gem, I would spend any length of time required by the manufacturer to do it properly, no questions!

[Sully60]

And what makes you think my little VTR hasn't got after market pipes on already, Oh Wrongly Assuming One?

Ask anyone who's ridden with me before...my girl sounds Reeeaaaaall good

I knew it did, I saw it on your profile pic before your changed it to the lovely picture yo've got now. Very cool btw Twin mufflers and all that, very balanced look from behind.

But you don't have a set of hand made NWM custom loudening pipes to scare the shit out of the entire Norf Shore though.

[Ocean1]

Indeed...i could be wrong, but I was told this was especially an issue with Triumphs, they definitely do not like to overheat.

This was also a reason for my questions, as I am very tempted by a 675 Daytona...Mind you, if I was to buy myself such a little gem, I would spend any length of time required by the manufacturer to do it properly, no questions!

Lot of the more serious sprotstoys are bloody light, one of the ways they get there is trimming coolant and oil volumes. Some of them are easy to cook.

[007XX]

I knew it did, I saw it on your profile pic before your changed it to the lovely picture yo've got now. Very cool btw Twin mufflers and all that, very balanced look from behind.

But you don't have a set of hand made NWM custom loudening pipes to scare the shit out of the entire Norf Shore though.

No, and it may be just as well, given the supposedly upcoming noise regulations...

Honnestly, i do think that loud is reall noice but I'm still a bit of a girly girl, somewhere deep down, and prefer a musical growl to actual bark...However, you should hear 007XY's

[homer]

Enough of this levity and general chuckleheadeness. I have questions.

So a piston reciprocates within the cylinder. The rings touch the sides and flatten off high spots during the first few hundred thousand cycles. At this stage the motor is referred to as tight. Fine.

Pistons do not simply reciprocate up and down. There are lateral forces transmitted by the conrod to the gudgeon and thence to the sides of the pistons. The conrod converts a turning force from the crankshaft into a vertical force but there is some sideways pressure.

So logically, since the lateral forces only go to each side, the bore should become slightly oval. Right?

But rings are floating. How can they turn and flex and move yet form a seal if the shape they are forming changes every 90 degrees?

This is all true
its called the thrust side
which is when the spark occurs it forces the piston harder to the front side of the cylinder
when it comes back up its with less force

[homer]

You talk to your momma with that mouth?
And there was I, trying to learn and take part in a serious bike thread...That''ll learn me!

Now, back on topic...does the "bedding in" time vary from bike to bike? For example: would a Vtwin take longer than a normal in line four?

Reason I ask: still doing research for potencial next bike.

i dont think it would take longer at all but this would depend on the woman and the time required and i guess the bed could be a problem
but i say no moslty just depends on the woman