• Announcements

    • Bryan Bosch

      JUST IN!   07/18/2018

      Video: 2019 Yamaha YZ250F Features & Benefits 

Sign in to follow this  
Followers 0

Installing 06-09 YZF forks on a 07-09 WRF


motox04

First go to an internet parts seller like eBay, Craig’s List... I got lucky and found a pair off a brand new 08 yz450f that a dealer was parting out! They came with the triple clamps (not needed), and axle which came in handy later. Now for those who don't know the forks are the same diameter and will fit in the stock WRF clamps, there are however many differences. The hub, axle, spacers, and brake caliper are all different. The hub and spacers are because the YZFs don't have the speedometer, and the YZF caliper uses a smaller mounting bracket, probably due to weight. You can however use the stock WRF setup and here is how.

042209_111100.jpg

In this image of the stock WRF, you will notice the space in-between the axle clamp and the wheel spacer. The clamp should not come into contact with the spacer; the larger diameter part of the axle is what should tighten down to the spacer. The next thing you will need to do is make a spacer for the axle. An YZF axle is too short to fit on a WRF. The WRF axle is longer than the YZF axle, but it is a little too long. The tapered part right before the threads will bottom out on the tapered part of the left axle clamp.

042209_134700.jpg 042209_134800.jpg

This will put all of the pressure from the nut torque on these two points, so the wheel will still be loose. To solve this you will need to make an axle spacer that will go on the axle and extend the larger diameter part a little to move the entire axle over to the right.

050109_145400.jpg 050109_145500.jpg

I used the new axle that came with the forks, but you can use anything that will fit over the axle and into the axle clamp. After trying a few different sizes 5mm seems to work the best. The YZF axle clamp is stepped over and wants to have the clamp come into contact with the spacer. To fix this you will have to file the lip off of the YZF axle clamp. I just filed until the lip was gone, and I could see light between the clamp and the spacer.

050109_150400.jpg

The YZF clamps don't have the lock for the speedo spacer, so you will have to position it where you want it before you torque down the nut. Once it is torqued down it will not move, unless you don't have the spacer wide enough and the pressure is on the tapered part of the axle and axle clamp. The axle will stick out of the right side, if you don't like it you can cut it off but it will no longer have the alan head cut to hold the axle when you tighten the nut.

042209_143200.jpg

The fork guards are also not compatible, so you have to get a little creative for the speedo cable.

042209_145300.jpg

Nothing says creative like zip ties... To get the brakes to work you can either order a 06-09 YZF brake caliper, or modify the original. To use the stock WRF caliper first mount it on the bike using the bottom bolt then center it by looking through the other side of the wheel and lining up the brake pads with the wear marks on the rotor.

042209_143101.jpg 042809_101600.jpg 042809_101700.jpg

Then mark the location of the top mounting hole on the caliper hanger with a pick, pen, or just something to mark the location of the top hole on the hanger. Remove the caliper from the bike, and then remove the hanger from the caliper. Drill a hole on your marked hanger and tap it to 8mm x 1.25 pitch. Then file the ribs to make the mounting surface flat, and make a spacer to center disk to the hanger. I can't give a specific width because you will probably remove a different amount from your hanger than me. This will require a few attempts to get it right, just have patience and make sure the disk is centered.

042309_092500.jpg 042309_125600.jpg 042309_131701.jpg

The brake line had to be moved up a bit because it was a little too close to the spokes. The white dot used to be level with the clamp.

042309_131300.jpg 042209_143600.jpg

Now make sure everything is tightened down, and go ride!

042209_150800.jpg 042209_150900.jpg 042209_145400.jpg


Sign in to follow this  
Followers 0


User Feedback


There are no comments to display.



Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:


  • Similar Content

    • By MegaVideo's
      Sorry for lots of pictures, but is this piston still usable? 







    • By dank08
      I am selling my 2001 yz426f(As is), I bought it used from private seller back in 2011.  I rarely used it at first, playing around in dirt areas and local OHV trails.  I began using it for bigger trail rides like Gorman in Hungry valley.  I hated the manual decompression. In 2015 I bought Hotcams stage 1 intake and exhaust cams for the auto decompression.  I had Motorcycle Tech in Upland, CA do the install.  They also installed a new Piston Ring and Intake valve.  Have work order paperwork and old parts from the job.  Last big ride was 2017 September, Kennedy Meadows.  Put on new tires before this ride along with fresh oil/filter and new air filter.  Bike ran like a champ and we made it up some some pretty nasty climbs first try 
      Bike has been sitting since then.  I've road it around the block a few different times.  It seems carb float bowl gasket is going bad or just dried up? When I started it today gas was leaking.  After I rode it around the block it no longer leaked.  Will check again tomorrow. 7/13/18
      *Update*
      Kicked over Friday and Sat. bowl was no longer leaking fuel.
      The Hand Grips are new. The front and rear fenders along with radiator shrouds are a year old.  Side # plate cracked as seen in picture.
      Still an awesome ol' powerful bike.
      Negatives are a heavy clutch pull and a grabby clutch.
      Selling because I've replaced it and have no intention of using it anymore.
      Pink in hand.
      I'm asking $2,000 OBO for the bike as is.
      No trades.
      Cash only please.
      Serious inquiries only.
      Thank you.
       
    • By JakeBurcham
      Hello everybody,
      My name is Jake and Im new to TT. I just picked up a 2003 yz125 that needs a LOT of work. I was hoping that you all could help me find parts for this bike. Here are some things that I am searching for:
      complete donor bike. could be 99-04 yz125 that was wrecked, salvaged, etc. Also I am not an expert on yz125 part interchangability so if you all have any info on that topic that would be really helpful. For example, do a lot of yz250 parts interchange with the 125? What years are certain yz125 parts interchangable with the ones on an 03?  A donor motor. The motor on my bike is seized up and pretty rusty. I will be attempting to save as much of it as possible, but I need a clutch pack and top end (piston, ring, etc). The perfect donor motor would be a good motor with busted transmission (since my transmission seems to be fine). Rear Wheel. I dont have one at the moment. Hoping to find a good rim and hub assembly with maybe bad bearings or bad tire. Basically looking for something fixable here. Ive had some luck on ebay for the rear wheel but Im waiting to see if I cant find a donor bike that has a decent rear wheel. This will be an on-going project for me and I will be posting updates as I go. I would appreciate your help!

    • By ReaptheHeat
      2013 WR250R with 2.1k miles. 2nd Owner. Used for some light commuting and mostly FS roads. OTD new these are 7k+. Has the essential protection and luggage mods that will save you $500+ from the start.

      Ideally I would like to trade for a 350 or 500ish EXC, Beta 350-500. Fuel Injection preferred. Negotiable when dealing with trades.

      Mods:

      -Flatlands Skid Plate
      -Flatlands Radiator Guard
      -Pro Moto Billet Rear Rack
      -Pro Circuit Muffler and Header
      -EJK Fuel Tuner
      -Sandman Case Saver and Shift Guard
      -Zeta Pro Bend Hand Guards


      Current Tires:
      Front: MotoZ Enduro - Changing out for a MT21 in the next couple weeks (if sold before will include)
      Rear: MotoZ Enduro - Probably ~500 miles left

      I have the stock muffler and header, passenger foot pegs, helmet lock, and tool kit. Comes with purchase/trade

      Clean Colorado Title in Hand
      Test Rides Cash in Hand
    • By Koray
      I have a '02 yz85 and today I replaced the right side crank seal, head o-rings, and swapped out the head for a VHM performance head. I also put a FMF SST pipe on it with a FMF Shorty. The bike has been working perfectly all day, other than running poorly since i need to rejet. But no other problems then that. I came into the garage about 5 hours after riding, and noticed that when I turned the kickstart over, theres some grinding noise. It did not do this after I put it back together, it just started out of nowhere. While I was putting the clutch back together I noticed the shaft the clutch goes on moves in and out, I called my friend who has replaced the clutch on his 85 and he said it was normal and his was the exact same, so I didnt worry about it.  After I put it back together it was not making this noise, and didnt make it after riding either. Just started out of nowhere. Heres a vid to show what it sounds like. I don't remember it ever making this noise. I took the clutch apart to make sure nothing was wrong, I didnt find anything wrong except a little gasket maker that got onto the clutch since I put too much. Doesnt feel like theres any resistance while kicking it over, in the video the spark plug is out. Help?