Breaking in a bike

[discotex]

Well, honestly i dont think its a bad idea. Been doing that on all our dirtbikes basically. Keep it calm for an hour or so to let it settle then ride/race like you want. Dont see why road bikes would be any different.

Totally makes sense to me but for some reason I'm not sure I want to ride it like I stole it straight off the showroom floor. He's got some good points though.

[motorbyclist]

(constant revs is supposed to make a mark in the cylinder which would cause the piston not to seal as well as it should later on)

i've heard that a few times yet have never heard any sort of explaination


imho it shouldn't make much difference - it's just metal polishing metal, ideally without excessive heat/wear

Well, honestly i dont think its a bad idea. Been doing that on all our dirtbikes basically. Keep it calm for an hour or so to let it settle then ride/race like you want. Dont see why road bikes would be any different.

roadbikes should last atleast 50,000km without the rings giving in, whereas dirtbikes are meant to last a weekend or two (if you beleive what the manual says)

[Real_Wolf]

With the mark in the cylinder, one would assume that it wouldn't be doing anything keeping it at constant rev's anymore than it would 10,000k down the road

[motorbyclist]

With the mark in the cylinder, one would assume that it wouldn't be doing anything keeping it at constant rev's anymore than it would 10,000k down the road

reword please?


how does not varying the load wear a mark? it's a piston goign up and down over the same range reguardless of speed (give or take the 0.001mm stretch/squish in the conrod)

higher load (ie higher torque requirements) just means higher pressures in the chamber which means higher pressures on teh rings pushing against the cylinder (along with every other loaded bearing/gear through to the wheel). aslong as we minimise this until everything has mates properly what does it matter?

perhaps it's jsut to get us to use all the gears to ensure that they all have done the most part of their wear and run in properly before the 2nd oil change (again not loading the engine will mean less forces on the gears)

[Real_Wolf]

yeah, my post makes very little sense lol.

what I meant is that the 'don't keep it at constant revs' shouldn't truly matter much in terms of the engine, for the forces being placed against the cylinder, and indeed all the forces in the engine should not be that significantly varying over time (as in, over the km's that you travel), and as such the materials that it is constructed out of should not be experiencing any different stress/strain than they would be 10,000km down the road. And if the metal is finished off properly, the amount of stress/strain it can take won't change significantly either.

Though it could be for some other part of the bike that they don't want it at constant revs.

[bucket boy]

I am too tired to answer this one, pm Gordie on this site he will give you a concise answer on your predicament

does nodrog ride is bike i thought it just stays in the garage

[discotex]

what I meant is that the 'don't keep it at constant revs' shouldn't truly matter much in terms of the engine

Constant revs is possibly the lowest strain you can put on the engine while you're riding the bike. If you need some strain on the engine to bed things in then constant revs could be bad.

[jonbuoy]

Theres a lot of confusion because different parts of the engine need different ways to run in. Piston rings need a high engine loads to bed in properly and avoid glazing poor compression and oil burning, rotating surfaces need to polish each other and undergo a few heat cycles before things loosen up a little. Gears and shifters need to wear together. You´ll notice yourself some difference in the way the engine picks up once its run in.

The only thing thats definately bad for a new engine or any engine is raping from cold, sitting in traffic, lugging, excessive idling in the driveway. Common sense says mix it up and don´t be scared to give it a quick squirt every now and then.

[Real_Wolf]

ah thanks for clearing it up, its don't idle so it puts varying pressure so that other stuff has more pressure on it rather than that the low pressure damages it

[carver]

just thrash it

[gavjn]

just thrash it

rofl fuckn love it, str8 up and out of nowhere.

really wish that were the case, the bike has SOOO much more power than my pisshead 250 (which is unfortunatly the most powerful bike ive riden ><)

[carver]

rofl fuckn love it, str8 up and out of nowhere.

really wish that were the case, the bike has SOOO much more power than my pisshead 250 (which is unfortunatly the most powerful bike ive riden ><)

well, maybe i should have said just ride it normally and how you want.
il break in a bike properly in 100k, then just ride it how you want

[gavjn]

jst another noob question... wats lyk the hottest temp your engine shud get before its not good?

[3umph]

jst another noob question... wats lyk the hottest temp your engine shud get before its not good?

good question... and is the gauge reading correct??? and if you only have a gauge not a readout then what temp is what on the gauge???

[3umph]

Run the bike in as you want to ride it... just no full noise shit or laboring it... up and down the revs and gears is good

and warm it up first before doing anything....

find a good long twisty section of the road and go for it