WR weight loss, how to guide.

I want to make my WR lighter, its a 04 but i am sure the steel frame bikes will all benefit from the same mods and the alloy frame ones will be quite similar.

I need to keep the lights and speedo (to be road legal) but not too fussed about the E-Start.

So far I can think of -

Battery, starter and all other assoiated parts.

Coolant bottle.

Side stand.

What else can i rip off that will make the bike lighter and perform better? I dont want to go crazy and spend a fortune (or i would just buy a YZ) so I will only do cheapish mods.

Currently my bike has all the free mods, a full FMF exhaust and Jd jet kit installed so the engine is powerful enough but it would be nicer if it was lighter.

you are on the wrong track of trying to lighten theload of the pig. I used to have a crf450x and a few of my buddies had wr450's. WE were all able to lighten the load between 50-60 pounds by buying yz250's. The only thing that the 450x could do better than my two stroke was to drain my pocket book faster.

Sounds like you have everything covered but I wouldn't take off the side stand for a street legal bike.

Change the stock rear fender for a YZ style fender which is about 1/2 the weight and switch to a cheap LED taillight. Run an 100 size rear tire instead of a 110 or 120. Less rubber will make the tire lighter. Swap the stock upper and lower steering clamps for lighter weight aluminum ones such as Applied Racing clamps which are sort of cheap. Change the stock fork and rear shock springs to titanium springs such as ones that come stock on YZ's. If you run an aluminum skid plate then switch over to a Hyde Racing teflon polymer skid plate.

Change the stock rear fender for a YZ style fender which is about 1/2 the weight and switch to a cheap LED taillight. Run an 100 size rear tire instead of a 110 or 120. Less rubber will make the tire lighter. Swap the stock upper and lower steering clamps for lighter weight aluminum ones such as Applied Racing clamps which are sort of cheap. Change the stock fork and rear shock springs to titanium springs such as ones that come stock on YZ's. If you run an aluminum skid plate then switch over to a Hyde Racing teflon polymer skid plate.

Any when you are done doing all of that, it will be lighter on the scale, but still a heavy pig!

Its a great bike. Its heavy but very stable on the trails. Its kinda like driving a suburban as opposed to a porsche. The suburban has excellent speed and acelleration, but rides really really smooth because of the weight. The WR wouldn't be a WR without a little extra weight. Personally, I have come to appreciate what the WR is for. I also appreciate my suburban.

Two things will make the wr feel a lot lighter. SUSPENSION. Get the bike setup properly and get the geometry right. Take it to a pro and have them do this for you. TEADMILL. Buy one and start using it 2-3 time per week for 45 minutes. I did this also and addressed the biggest weight issuse (my gut!)

Did you read the suggestion about the yz250? I did that also. It was very cheap to buy and is very cheap to maintain.

You'll mutilate your bike, then the only thing you'll really notice is that it's a pain to start, it's a pain to park and it'll leak coolant. It won't rode any differently, won't be any faster. Just run a half tank of fuel. Much easier. It's a 450. Deal with it.

Or get the 250. But then you'll need more power.

Ride a streetbike for a while. Then hop on your 450. It'll feel like a twig.

carbon fiber may be your best friend

As others have said, you ain't gonna get the weight down to 250 like...and even if you did, all of the inertia of the big 450 motor spinning around will make it feel heavy. The YZ rear fender and an aftermarket headlight will cost about 200 bux and save about 2 lbs (but will look lots better). Swap the stock odo for a vapor, again about 200 bux and 1/2 pound or less. Lower the radiators...this is actually a pretty good mod...while it doesn't save any weight, it feels lighter cuz the weight's lower. Run a Zip Ty racing tank...holds the fuel as low as you possibly can...and then only fill it half full. Be preparred, though, even after spending all that bank, the bike won't feel a whole lot different. Maurice is righ on the money...lose your body weight if you need to (I know I do!!!) and do strength training (I know I need to!!!) and the weight won't matter as much.

While I would like to have the option of a flickable YZ250 pinger for off road, momma insists that one bike is almost 1 too many, so I'm not giving up on the DS's 426. I am improving myself (very slowly, as I'm freakin old) instead...

Create an account or sign in to comment

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

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now