Bike Reformation

Runyon113
Posts
2
Joined
4/23/2010
Location
Stratford, IA, USA
Edited Date/Time 1/23/2012 11:19pm
I have a 2001 Yamaha yz250 And i want to do a complete tair down on everything does anyone have any ideas on the parts for the bike i would need and if so whats your fav brand
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NeWskoolmxer
Posts
1346
Joined
10/12/2009
Location
Central, OH, USA
4/23/2010 7:28pm
Well For my yz250 I used to race. I went for the stage three boost bottle kit for starts N.O.S makes it Reached about 70 in 6 secs.!
4/24/2010 7:14am
Gasket Kit (complete), seals and Main Bearings just to start with
RACEGUY
Posts
1893
Joined
8/25/2009
Location
Moncton, CA
4/24/2010 9:55am
Not enough info. Work from the ground up. Disassemble and inspect everything as you go.

Start with tires, tubes, wheels and spokes. If they've never been done, wheel bearings may be on your list. Check brake rotor thickness, warpage/runout, and new pads may be on your list.

Remove the swingarm and check every bearing and bushing. Make sure shock bushings are nice and round (not oval) and don't wobble on the bolts/shafts.

Unless your forks are pitted or ovbiously damaged, the least you should do is a simple service and new seals. If there's no history of the shock behing done, a simple service will do a world of good.

Chances are the steering stem bearings have never been done. Now is the time.

Pull and dismantle the clutch. Check all plates for breakage, warrpage, and signs of overhearing. I would, at least, replace the springs, and if the basket has notches etched into either the fingers on the basket or the grooves in the hub, send it for scrap metal and start new.

If the engine cases have never been split, you're overdue. Visually inspect and measure the crank. You WILL replace crank bearings and seals on reassembly. What you do with the top end will depend on just a few simple measurements.

Replace anything close to our out of spec. replace every single gasket and o-ring you might disturb in the process.

Don't forget to have a good look at the shifter drum, forks, and shaft while you're in there. Always replace the shift shaft seal.

One item at a time - from the ground up. Don't dedicate any bucks to the bling-bling budget until everything else is looked after.

Do it right, and it will almost feel like a totally new bike. Good luck. Enjoy the project.

The Shop

lumpy790
Posts
11850
Joined
9/18/2007
Location
York, SC, USA
4/26/2010 7:52am
Great bike to start with! I rebuilt the motor with a new Wiseco crank and a OEM top end and freshened up the Race Tech suspension with a complete fork and shock service at the same time as doing my 01's transformation.











pie8man
Posts
634
Joined
4/1/2008
Location
Loveland, CO, USA
4/26/2010 3:26pm
Whether the linkage needs it or not I would do it and make sure you use new seals.... One thing most people overlook is the little spherical bearing in the top of the shock. it is the smallest bearing in the entire linkage with the most load and wears quickly in comparison to the rest of the linkage.

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