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 '03 YZ450F forks on a WR250R is this possible?

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maprog86
Cal44
LordEndo
johninlv
gomerwr250
Biglake
4play
wapner
12 posters
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wapner





'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyFri Mar 21, 2014 3:26 pm

I realize that the front forks are undersprung for me at 235 without riding gear. I recall seeing a post about someone putting wr450f forks or wr250f forks on our R2s. Today I came across a set of 03 YZ450F forks complete including triple clamps. Does anyone know if they would fit or not?

Thanks in advance for your replies.
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4play

4play



'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyFri Mar 21, 2014 7:46 pm

I'm in the same ballpark without gear & with the right oil level & 1/4" preload the stock fork springs are doing pretty well in the revalved forks.
I READ another guy used 2006 YZ125 triples & forks without issue. I also read another guy that had to use the caliper off the 450 forks he used. The spacing was different on the caliper bolts.
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Biglake





'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyFri Mar 21, 2014 8:37 pm

You can make them fit but you need everything, tripple clamps, wheel with spacers and brake caliper with bracket.

The yz forks only have .48 springs in them, the wrr has .47 so the springs arent much stiffer, the yz valving is a lot better tho.

The yz/wrf forks have the potential to work better than the wrr forks as they have bigger/better valving setups in them plus an inch more travel, but if they're not set up good revalved wrr forks will work better and save you some money.

You can shorten the wrr fork springs close to an inch then put an inch spacer in, this makes them about .50s, this is pretty cheap, I had it done for 50 bucks at a local shop. It made a big difference im 240lbs, I also have gold valves in them.

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gomerwr250





'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptySun Mar 30, 2014 12:07 am

Biglake wrote:
You can make them fit but you need everything, tripple clamps, wheel with spacers and brake caliper with bracket.

The yz forks only have .48 springs in them, the wrr has .47 so the springs arent much stiffer, the yz valving is a lot better tho.

The yz/wrf forks have the potential to work better than the wrr forks as they have bigger/better valving setups in them plus an inch more travel, but if they're not set up good revalved wrr forks will work better and save you some money.

You can shorten the wrr fork springs close to an inch then put an inch spacer in, this makes them about .50s, this is pretty cheap, I had it done for 50 bucks at a local shop. It made a big difference im 240lbs, I also have gold valves in them.

I'm kinda stupid when it comes to suspension so over look my ignorance bit witch end do you cut top or bottom and what shock spring matchs the forks well after cutting them
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Biglake





'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptySun Mar 30, 2014 9:41 am

You cut the top of the spring and put the spacer on the top of the spring, it stays in place better when its on the top.

You also need to heat and bend the last coil flat on the spring so it sits flat.

I had this done by a shop as I couldnt heat and bend the coil on my own, I dont own a torch.

A 9.4 rear spring would be the right weight for you.
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johninlv





'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyThu Apr 17, 2014 7:41 pm

I hope I can make this work. I have $200 in a complete 2003 wr450 front end minus the triple clamps. Its low mileage and looks like new.

http://advrider.com/forums/showpost.php?p=21912596&postcount=36672

I am not going to speed money on the wr250r forks.

JOY
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johninlv





'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyTue Apr 29, 2014 3:42 pm

Here is another guy installing WR450F forks on his WR250R

http://www.advrider.com/forums/showthread.php?p=24014132#post24014132

Lots of used KYB 46mm forks out there.
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4play

4play



'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyMon May 05, 2014 7:47 pm

After two re valves my forks work really well for most things, but we've never been able to get it progressive enough for the big hits. I went ahead & bought 2002 WR250F forks & a YZ250F front wheel & axle setup. For my riding a .49kg spring will be part of the rebuild. I'm afraid it's just going to highlight the deficiencies of the rear shock, but the front definitely needs a bit of help for what I do with the bike. I figure I'll run with the forks about .750" up in the triples, for basically a 1" rise in the front, which will be pretty equal to the taller MT43 rear tire.


Last edited by 4play on Sun May 11, 2014 6:49 pm; edited 1 time in total
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4play

4play



'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptySun May 11, 2014 3:09 pm

I installed the 2002 WR250F forks today. I used a YZ250 front wheel, axle & spacers. Everything was a bolt on, no mods. That is the original caliper & brake line. I have them .800" up in the upper triple clamp. Just did a joy ride around the block running up & down curbs & one 2' dirt pile jump. Feels good, but the real test will be Saturday in the whoops.

'03 YZ450F forks on a WR250R is this possible? 20140511_114835_resized

The 306 is in the background & is nearly ready to install  wings
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4play

4play



'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptySun May 18, 2014 12:08 am

The front end is so much better than the reworked original. I can hit a string of 2' whoops without fear of getting out of rhythm. The stock setup did not have enough high speed dampening to absorb that kind of hit, this does.
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LordEndo

LordEndo



'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyMon Dec 15, 2014 1:36 am

Will YZ forks work or do they need to be wrf forks?
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Cal44





'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyWed Mar 25, 2015 1:08 pm

I have two 2003 YZ's. 2 stroke. and bolted on a set of forks along with the front wheel and caliper on the WRR. I dropped the fork in the triple to keep the geometry the same as stock I have bar risers on that allowed me to drop them enough. I weigh 180 no gear. YZ forks have stock springs. It works so much better then stock on tech single track!!  I want to get the shock redone by GO Race or wait for the all new shock GO Race is developing. Even with the stock shock and the YZ fork, it's so much better. I'm an A level senior enduro rider. I love this bike!! So versatile!!

I'll probably go to the next stiffer YZ spring after getting the rear shock re valved. YZ rear wheels bolt right on but the rotor is too big FYI.
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maprog86

maprog86



'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyThu Mar 26, 2015 9:44 am

Cal44 wrote:
I have two 2003 YZ's. 2 stroke. and bolted on a set of forks along with the front wheel and caliper on the WRR. I dropped the fork in the triple to keep the geometry the same as stock I have bar risers on that allowed me to drop them enough. I weigh 180 no gear. YZ forks have stock springs. It works so much better then stock on tech single track!!  I want to get the shock redone by GO Race or wait for the all new shock GO Race is developing. Even with the stock shock and the YZ fork, it's so much better. I'm an A level senior enduro rider. I love this bike!! So versatile!!

I'll probably go to the next stiffer YZ spring after getting the rear shock re valved. YZ rear wheels bolt right on but the rotor is too big FYI.

I used 2003 wr450 forks with a 2001 yz front wheel and my front brakes/rotor worked without issue.  I have them pretty high up in the trees with a 3/4" bar spacer.
I had Go Race do their magic on the rear before i messed with the forks.  It definitely showed the shortcomings of the stock forks.
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Zoltan

Zoltan



'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyWed Apr 08, 2015 4:11 pm

4play wrote:
I installed the 2002 WR250F forks today. I used a YZ250 front wheel, axle & spacers. Everything was a bolt on, no mods. That is the original caliper & brake line. I have them .800" up in the upper triple clamp. Just did a joy ride around the block running up & down curbs & one 2' dirt pile jump. Feels good, but the real test will be Saturday in the whoops.

'03 YZ450F forks on a WR250R is this possible? 20140511_114835_resized

The 306 is in the background & is nearly ready to install  wings

Hi there...what year yz250 wheel or does it matter? Curious..
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Cal44





'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyThu Apr 09, 2015 2:13 pm

Zoltan wrote:
4play wrote:
I installed the 2002 WR250F forks today. I used a YZ250 front wheel, axle & spacers. Everything was a bolt on, no mods. That is the original caliper & brake line. I have them .800" up in the upper triple clamp. Just did a joy ride around the block running up & down curbs & one 2' dirt pile jump. Feels good, but the real test will be Saturday in the whoops.

'03 YZ450F forks on a WR250R is this possible? 20140511_114835_resized

The 306 is in the background & is nearly ready to install  wings

Hi there...what year yz250 wheel or does it matter?  Curious..

They all should work from the last 15 years or more. I also needed to correct my post above, I did not need the YZ caliper and brake assembly. Stock WR caliper is fine with the YZ wheel as the others mentioned. Sorry for the confusion.

I will mention that the WR rear disc is smaller then the YZ, but a YZ rear wheel appears to fit otherwise with the YZ rear wheel spacers. This is nice if you want to do a quick swap from a DS tire to knobbies. Just a thought and convenient if you own a YZ or YZ's.
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bdubonthemic

bdubonthemic



'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Wr250r suspension swap and OEM speedometer   '03 YZ450F forks on a WR250R is this possible? EmptyMon Jul 25, 2016 9:27 pm

Thank you for your write up on the suspension swap. I am really interested in making this swap on my 2013 wr250r and was wondering if it is possible to use the oem speedometer? Does the stock upper triple clamp work with other mx tubes? Just ordered a brand new oem speedometer so i would have the other features that the trail tech does not have.

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4play

4play



'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyTue Jul 26, 2016 9:38 am

bdubonthemic wrote:
Thank you for your write up on the suspension swap. I am really interested in making this swap on my 2013 wr250r and was wondering if it is possible to use the oem speedometer? Does the stock upper triple clamp work with other mx tubes? Just ordered a brand new oem speedometer so i would have the other features that the trail tech does not have.


Yes, use your original triple clamps, just slide you old forks out & slide the new one back in.
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bdubonthemic

bdubonthemic



'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyTue Jul 26, 2016 9:46 am

4play, thank you very much for the response. So really any of the Yamaha 46mm fork tubes should work? As long as I get a yz wheel with appropriate spacers?
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4play

4play



'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyTue Jul 26, 2016 10:02 am

My ebay sourced wheel came with the original spacers & axle & it was a direct fit.
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paulie1960





'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyThu Jul 28, 2016 6:07 am

I installed 03 yz250 forks, just made bushings for the upper clamp and wheel axle, it changed the ride height to high, but
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paulie1960





'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyThu Jul 28, 2016 6:08 am

I installed 03 yz250 forks, just made bushings for the upper clamp and wheel axle, it changed the ride height to high, but actually revalve the stock forks with gold valves and got them to work better than the YZ Forks
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paulie1960





'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyThu Jul 28, 2016 6:50 am

Took three trys to get valve stack just right. Racetech is a good way to learn all about suspension tuning, now I could change valve stacks in an hour on both forks


Last edited by paulie1960 on Thu Jul 28, 2016 4:18 pm; edited 1 time in total
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bdubonthemic

bdubonthemic



'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyThu Jul 28, 2016 11:34 am

Which fork gaurds did you use for 450 forks?

So is the only option for rear to get rebuild with a stiffer spring?
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bdubonthemic

bdubonthemic



'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptyFri Jul 29, 2016 9:55 am

The front yz450 forks look and work even better. The bike handles landings way better and even rides a little better. I would definitive recommend'03 YZ450F forks on a WR250R is this possible? Yzfork10
this to anybody bottoming out there stock suspension regularly. Thanks to 4play and everybody else who helped out with advice.
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auswr250





'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? EmptySat Jun 16, 2018 5:46 am

sorry to bring this thread back from the dead but seen a few front end swaps but alot of variation of height in triple clamps. seen .8 of an inch upto 1.5inches. im wanting to run .8 of an inch up like 4play has. has it affected geometry n steering much?
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'03 YZ450F forks on a WR250R is this possible? Empty
PostSubject: Re: '03 YZ450F forks on a WR250R is this possible?   '03 YZ450F forks on a WR250R is this possible? Empty

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