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KVO-TN1-2beat

How often should I do maintenance?

11 posts in this topic

On a 2003 Yz450, used for woods riding, no racing, how often should I do the maintenance on the bike? Like valve chech etc? Also how tight should the chain be? I put about 2" of slack in it while on the stand, but when I sit on it it tightens up quite a bit. Is that normal?

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I ride only in the woods too and my maintenance schedule for greasing the swing arm, linkage, wheel (pull the dust seals off and the bearing seal out carefully not to damage them and push in good grease like Silkolean) and head bearings and checking valves is every 4 mo, and I ride 3 to 4 times a month. I take my forks and shock into get serviced every 6 mo. if there's no problems. If you mean oil change, I change mine after every 100 mi to 120mi and clean the frame screen every 3rd change and change the filter every other oil change but I clean it and use compressed air to blow the filer clean and wipe out its area. I clean my air filter every ride in the summer because of the dusty conditions and in the winter I give it a good look over and if its not dirty I clean it every other ride. It's a good schedule for me, I've used it for many years without to many problems. :thumbsup:

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What about valves and rings etc? Also about the chain tension, how loose should the chain be on the stand versus sitting on the bike?

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Best thing to do is get an owner's manual for it. The Yamaha manuals for the YZ's are quite comprehensive and show just about everything you need from how to start it to complete engine rebuild. Do a search on valve adjustments and you'll get the general idea of how dependable the YZ's are. However, you gotta think about what kind of care it has seen since new. (did the previous owner thrash it and not maintain it?)

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checking valves is every 4 mo, and I ride 3 to 4 times a month.

I check valves every 4 mo. The chain tension should be checked with you sitting on the bike with maybe 1/2" of slack in the chain. I can't tell you what it should be on the stand because allot of factors come into play like the way your suspension is set up. Read your owners manual about the piston and rings. I don't know myself, this is my first 4-stoke after 20 yrs of riding 2-stokes, but the way we checked a 2-stroke is you take off the header pipe, look into the head and see if you are getting any blow-by past the ring. I don't know if this works for a 4-stroke. You will learn all these things in time.

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The chain tension should be checked with you sitting on the bike with maybe 1/2" of slack in the chain.

Is that 1/2" either way, or 1/2" from lowest to highest? I realize I phrased this a little funny, but I'm having a brain fart right now.

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I race, and trail ride. I check my Valves every 20 hours, Oil Change every 5 hours, Filter change Every 10 hours/Everyother oil change, Im going to go through and lube my stuff up right now because it's brand new, but other than that Im going to check all that every 20 hours, when I get my valves/oil/filter/etc... all checked/changed.

Not sure on your chain, it shouldn't be tight when off the stand though, I mean it should be snug, but not tight.

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Chain: manual page 3-32.

I lost my factory manual. I have a clymer coming in a few days. I guess I'll just wait until I get that.

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I lost my factory manual. I have a clymer coming in a few days. I guess I'll just wait until I get that.

Go to http://www.yamahaownershandbook.com.au/?r=0

select motorcycle, write 450, select no model year.

Then download yourself the manual in pdf you need. You can't print it, but you have a manual in your computer. :thumbsup:

Edit: zique, checked your garage, you need to write 426, naturally. :thumbsup:

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Go to http://www.yamahaownershandbook.com.au/?r=0

select motorcycle, write 450, select no model year.

Then download yourself the manual in pdf you need. You can't print it, but you have a manual in your computer. :thumbsup:

Edit: zique, checked your garage, you need to write 426, naturally. :thumbsup:

Dang...where were you $30 ago?

Yeah, I picked up on the 426 already. Thanks, I appreciate it. I got 'er downloaded and I'll probably start checking a few things tomorrow.

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