17 replies to this topic

[hammerman]

Now I have pretty much committed to having my cylinders honed and fitting new piston rings, I did some research on the break in procedure. I thought taking it easy was the normal way of things but then found this

http://www.mototuneu..._in_secrets.htm

What have others done to break their new rings in ?

[dapleb]

Hehehe its a topic loike oil/tyres etc.....lots of conflicting views and very little proof.

I went for upper end of Yamaha spec and advice from the Bentley Boys........did it work...well the bike still runs. I have no evidence that it worked better, different or worse than any other break in method.

Have also read about using mineral rather than semi/synth oil for break in.....again very little evidence on this.

Good luck with whatever you decide.

[OldGreyWizard]

In the "Old" days the gradual approach to braking in a new bike was the only option. Engine tolerances were not as good as they are today. For the last two new bikes that I have had the advise was, take it easy for the first few miles. That was only to scrub in the new tyres. As far as braking in the new engines, I was told that it was not really necessary these days.

There is a lot of advice here which is counter to all that is normally preached, howerver the guy has lots of experience and does seem to talk sense. He also has little if anything to gain.

That said you are talking about a rebuild here and not a new engine built with factory matched components. You have to go with your own gut feel I think on this one.

[Studley Ramrod]

I'd agree with OGW and rely on the force Luke

I've just done 10 miles on my new rings. I'd left the old oil in and topped it up, then got her up to temp before a run around the bypass a few times taking her up to 4,000rpm.

Got back and drained off the oil, which wer blacker than a miners mascara, put fresh in with a new filter.

I'm now waiting for the force to guide me in the next direction

[jdelfino]

I fuc%$#@ up a brand new diesel engine on a sailboat once! by going to easy on it during the first few hours, end up "glazing" the cylinder liners, months latter, found the engine manual and it said: "under full load rev engine up to 80% rated RPM during the first 20 hours"..!!! of course, I did the opposite! That "glazing" mean a lot of back pressure on crankcase and oil getting "burned" and leaks after a few hundred hours...

Edited by jdelfino, 01 March 2010 - 12:26 pm.

[TDMTAM]

and rely on the force Luke

You under estimate the Power of the Darkside...... Nail it
On a serious note I let my bike warm up but then just use the bike as I would normally dont this in diesel cars & on motorbikes appart from 2 Strokers
TAM

[tdm850rider]

Variation is the key, Run at differing loads (speed/rpm) just don't stay at any one for a great length of time.


Variation

Variation

Variation

[hammerman]

Well the consensus seems to be, not to take it too easy and not to push it too hard. So I guess a 100 mile trip including some motorways, A roads and some twisties with an oil and filter change at the end would seem a logical course of action.

thanks for the input people

[dapleb]

Good luck.

[dapleb]

He is probably trundling up the motorway as you type.

[hammerman]

He is probably trundling up the motorway as you type.

certainly no trundling going on, in fact no movement at all the bike's in bits all over the garage....


But when it's back together do I take it out and ride it like a stole it ???? There's a different answer for every day of the week.

[dapleb]

I did warn ya. Check the Yam spec....it says vary enjun speed....that ties in with not keeping at constant revs for prolonged periods.

When running mine in Wicky decided it would be a great idea to go up Porlock Hill. I were cussin him good and proper the billy sollox.

[AL-58]

As a younger person I used to work in the factory where they built Minis and Mokes in Australia. Straight off the line every car was run on a set of test rollers to test the gearbox and speedo etc. They took the car to redline in every gear (that's what it sounded like anyway, I was just across the road from the rollers). About 5 minutes of that treatment for every car.

Also my dad was a mechanic with a workshop at home, I clearly remember the packaging on the packs the rings came in saying to load the motor to put pressure on the rings to aid bedding in. Taking it easy was never a part of it. I've treated every new motor that way since.
Al

[Studley Ramrod]

Had a chat with the darkside and for my next mission I'm gonna give her a blast around the B roads, lots of variation in throttle and engine breaking braking.

Just popping the vehicle recovery card in me pocket first and check the coolant and oil levels. I reckon a good 30-40 miles should be ok.

[Studley Ramrod]

Had a good blast today on the bike , that is. Lots of 3/4 and full throttle and engine braking.

Engine is much better than pre-refurb really noticeable at higher speed, just keeps goin,

way past the *00mph mark .....erm, apparently

No plume de fumee noir et la le zorst, which is nice !

Bikes been starting on the button and no clinkyclanky or hissing sounds !

I reckon if I do the same tomorra that might just about bed me rings in.......vor gud !

Pity the weathers still total twyfords

Luke, you missed out bigtime, this Darksides' a ferkin' hoot

[dapleb]

NICE WAN.

[hammerman]

Rings arrived today. So I took the cylinder block off the bike tonight. The bores are in good condition, no marking or scoring and you can still just make out the original honing marks. The pistons show signs of a small amount of oil getting past the rings but nothing drastic. The block is booked in for a light hone on Saturday (The guy doing it described it as a 'glaze breaker'). I should have it back in the week so may get the engine back together in the next few weeks.