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YZ450JONNY

2005 YZ450 Break-in

15 posts in this topic

Hey folks...new to the site here...Just interested in knowing your thoughts about breaking in the 05' yz450...I just purchased one and havn't got it home yet...Any inside tips for me would be great...I will be racing it this summer with CMRC in South Western Ontario...Should be a blast...I still have a 2000 YZ 426, if you know anyone interested, drop me a line...It's in the Bike Trader right now for $3800.00 or best offer.

bye for now

Jonny

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Yeah like said regrease everything.

Then warm it up and ride it for an hour or so in gentle modeat the track. Do a lot of gear shifting. Take it to the pit, change the oil and after that, go wack the trottle.. :)

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Thanks for the comments...I'll be picking it up next week or so....i'm gettin' pumped...What else should i know about it, that differs from my older 2000 426. I got a bite on the old bike today...guy sounds interested, took it for a ride and was going nuts over the power...his first ride on a THUMPER...Hopefully it sells, but it'd be nice to have as a practise bike...

TAKE CARE, AND KEEP THE RUBBER SIDE DOWN... :)

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Tear the entire bike down and grease EVERYTHING. Then I would suggest following Motomans Break In steps. I followed them and my CRF works great, but everone has there opinion :p.

http://mototuneusa.com/break_in_secrets.htm

696

Ditto.

I can't honestly see why it should be driven gently, why?

It has been breaken in already for 5 extremely hard minutes at the assembly line, beating the crap out of it, full wide open throttle. And that is what the piston rings need to be seated. And that has to happen within the first critical 20 miles, not after some hour or so. If it would break down, it would have done it already at factory and it will do so anyway regardless how you ride it. Some fail and will be opened up by the factory R&D. This is infromation from a guy who has been at the line seeing this in Japan when he got his schooling there. Forget what the manual says.

First let it warm up properly, then do it in cycles - hard riding and cooling down. 10 minutes/10 minutes. Do it 6 times and change oil and filter.

Never rev it cold. Don't hit the rev limiter and don't let it run too hot.

Read the article and remember you have a 4-stroker, not a 2-stroker. Done like this on my 426F, 525SX and 450F, and so have everybody else here. Has someone doing like this had problems, please report? I know this topic is controversial and there may be other opinions, so I will not comment on it more. I have seen earlier the discussions and am sick of the "first 500 miles only half-throttle" bullsh*t. But it is your bike and good luck with it and enjoy every minute! :):)

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I rather enjoyed my "gentle" break-in...I did it per the manual, and, quite frankly, I couldn't have ridden it any harder if I had wanted to! Sure, I could have been revving the piss out of it, but sooner or later you have to get out of first gear.... Seriously, though, the gentle break-in time will also acquaint YOU with the bike, rather than trying to be agressive on your first ride. As an MSF instructor, take it easy on ANY bike until you are familiar with it's characteristics...then, and only then, RIDE IT LIKE YOU STOLE IT!!!!

:)

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I rather enjoyed my "gentle" break-in...I did it per the manual, and, quite frankly, I couldn't have ridden it any harder if I had wanted to! Sure, I could have been revving the piss out of it, but sooner or later you have to get out of first gear.... Seriously, though, the gentle break-in time will also acquaint YOU with the bike, rather than trying to be agressive on your first ride. As an MSF instructor, take it easy on ANY bike until you are familiar with it's characteristics...then, and only then, RIDE IT LIKE YOU STOLE IT!!!!

:)

Good post Butta. :) I think you hit the nail on the head.

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I always think it is funny when people tell you how to break in a bike. Read the manual. I think the engineers know best.

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The gentle break in is for the suspension, brakes and most importantly, the rider.

If the manual said "Ride it like ya stole it", then people who didnt know what they were doing would jump on, pin it, crash, and sue.

My question to the advocates of the hard break in is: 'If they supposedly do this at the factory, what difference does it make how we break it in?'

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He doesn't answer this question. He presents a conundrum:

He says that a hard break in is needed to make the rings seat. He says that even the manufacturer knows this because at the factory they rev the guts out of them as part of the assembly procedure.

Then why do brand new bikes that are broken in using the motoman method outperform easy break-in bikes?

I'm not trying to dispute the motoman method, it is an honest question. I suppose the only answer that i can think of is that we get them when they are partially broken in.

Another question. Does this mean that if a piston gets changed, the barrel should get changed as well?

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Per the manual.

When you're checking the tightness of everything remove the little inspection caps on the side covers and put Loc-tite on them. I lost one on my 03 and it ended a day of riding. Also, make sure you have the tops of the fork tubes flush with the top of the tripple clamp until your suspension id fully broken-in, about 2 hours of track riding. Don't mess with the clickers until you get at least 2 hours on the suspension. It softens up a bit. Finally, make sure you re-set the sag after the 2 hours and set the forks lower if you like.

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