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clutchinoregon

breakin in the 450

9 posts in this topic

hey every one, whats up? i just sold my 89 cr 500 and decided to give these 4 strokes a shot. man was i impressed! so impressed i ran right out and bought a 05 yz 450. now, ive never had a NEW bike before....i got most of my breakin in stuff done ( bolts, ect ) but im unsure about the bikes forks. they are way stiff, also the rear is to high for me, i like a tall bike, but this is ridiculous, if i turn the preload down, it should lower it ? no? what effect does that have on the rest of the shock? right now the rear is perfect,rebound ect, its just to high. man, that header pipe sure gets hot fast..... i also drained the coolant out and got some engine ice. ...besides bolts, takeing it easy for awhile, oil, do i need to do anything else special to break this bike in?thanks.....

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Then this is going to throw you a curve: Apart from the fact that they aren't broken in yet, your forks are too stiff because your springs are too soft.

The bike is sprung for a rider weighing about 165 lbs. With you, or to a slightly lesser extent, me on it, the compression damping has to be cranked up too far because the springs can't do what they should. The rebound doesn't work right either, because the springs aren't pushing hard enough. The right springs make a big diference.

Read these two pages concerning setting up sag and checking spring rate.

http://www.tootechracing.com/suspension_tips.htm

http://www.tootechracing.com/Static%20Sag%20Suspension%20Tip.htm

Lowering the rear by itself will decrease the head angle (the forks will lay out flatter) and make the bike steer badly.

If your header gets hot enough to glow a dull red after only two minutes at idle, it's....entirely normal. :)

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Man if your anything like me and dont understand the whole suspension set up thing. When i bought my 05 i told the dealership that i wanted the suspension done up for my weight. They had to keep it for a couple of extra days but it was set up the right way. Riding that 450 is like riding on air....very nice...

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damn, a curve it sure was. 165???? well at least i got a idea of what needs to be done now..... thanks for your help... and for the tip on that header too

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Well it sounds like I might have to do a little adjusting my 05 is real stiff too.

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Man if your anything like me and dont understand the whole suspension set up thing. When i bought my 05 i told the dealership that i wanted the suspension done up for my weight. They had to keep it for a couple of extra days but it was set up the right way. Riding that 450 is like riding on air....very nice...

I agree totally. While being able to fine tune the set for the your needs of the day. Your shop should be more than willing to help you set up your sag , and show you the finer points of the suspension. It will make your life easier for sure. Then again getting in there and doing it yourself will help you cause.

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Break In.

I ran my bike through three 8-10 minutes rides at 1/4 to 1/2 throttle, letting it cool for about 15 minutes in between each ride. After that I changed the oil and filter, checked all the bolts and it was ready to race. As for the suspension, I weigh 225 and have a stock suspension. One of the Techs at Factory Connection advised me to change the rear spring and also make some adjustments to the front forks. I have not had a chance to do this yet but plan on it soon. I ran Southwick (Ma) yesterday in a local racing event and my body took a beating. Other than breaking the motor in properly and regular oil/filter changes, adjusting the suspension to your weight is critical. Most of the people I ride and race with all have their suspensions dialed in and their ride is much smoother and they finish near or at the top.

Good Luck!

2004 Yamaha YZ450, White Brothers Aluminum Pro Exhaust

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