As for Dapleb & no evidence. I still say look at Motoman's Photos. What would he have to gain from giving BAD advise apart from threat of death from
very upset bikers! Quite the contrary, from what I read they support his method.
Over on the Thumpertalk forum, specifically the DRZ400 section, the moderator owns a bike engine tuning business.
He lambastes people for not doing it the mototune way
He swears by it. He has the pistons to prove it.
Owners who are having oil burning issues, he gets them to post up pics of their pistons and you can see the blow by of the rings exactly like motoman says
Then there are others who have posted pics of their piston coz they are doing engine mods, who have done it the motoman way and sure enough the piston skirt look like new.
Indeed he can tell which motors have been broken in too gently
Now I 'm an engineer by trade, and it makes sense to me.
If an engine is going to make max power then it needs a good ring seal. FACT.
The late John Robinson (from PB mag) explains this is what is needed in his engine tuning books from the mid eighties
Be under no illusion, if you have a tight clearance in your engine from a manufacturing defect, no amount of gentle running in will fix it.
Yes it is possible to over do it
To avoid warranty claims the manufacturers advocate a simple, safe break in.
Not the best, but certainly prevents warranty claims
Just imagine if they put it in the hand book to be agressive and stress the engine
there would bound to be some who trash it form cold
They don't want to be forking out for this stuff, hence they are over cautious.
Ever seen a car at the end of the assembly line, on the rolling road?
if you think you need to baby you engine, it would open your eyes.
