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BIBMEN

WR 450, Is there a list of the free mods

12 posts in this topic

Is there a list of the free mods everyone is referring to somewhere on the site?

Thanks!

David

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Welcome!

Offhand, I dont know of any place where there's a published list persay...just several other posts like this with folks asking about what mods they can do to their bikes...

Here's a partial list:

- Cut down the stock throttle stop (stock length only gives you about 1/2 throttle capability!).

- Remove the airbox cover (allows carb to breathe better...more power).

- Re-route the various carb vent lines into the airbox (helps keep water out of carb when bike is running and stuck in a stream).

- Cut the grey wire (you'll have to read-up on this one...didnt notice any improvement myself).

- Adjust the front and rear suspension to your riding style and weight.

- Change to YZ timing (helps power in mid to high end, sacrifices some of your low end...personal preference).

- Uncork the exhaust (if you're riding in a location that this is appropriate).

- "BK" mod (limits the amount of fuel being poured into the carb by the accelerator pump when opening the throttle...removes the low-end "bog" you most assuredly will have).

Now, some not-quite-free but definitely worth while improvements:

- Jet the bike correctly (2nd biggest performance improvement over shortening the throttle stop).

- PowerNow/JamesNow mod (helps with airflow into the carb from 0 to 1/2 throttle...good feedback on this one, but havent done it myself yet).

- Get rid of the stock tires and purchase some Michellin M-12's or Dunlop 756's.

That should get you thinking and keep you busy for a while. I suggest doing searches on each of the topics listed above that you're interested in. There's a wealth of information out here on this site. Also, dont be afraid to ask questions! :)

Good luck!

Larry

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Good list Larry. 1 thing to keep in mind that on the 450's changing the timing involves changing the cam, i.e. buying the YZ450 cam.

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Right on.

How's my ol' home state doing? Enjoying that 80 degree weather are ya? I sure do miss it there... :) But MN isn't all that bad either... :D

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Good list Larry, but the WR450 needs a new cam to go YZ timing $160. smackers. You do not need the BK mod on the WR450 carb either. :)

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No accelerator pump mod required for the 450, eh? Nice. Why is that? Is it a different accel -pump, or did they actually decide to put in some sort of accel pump actuator-throw adjustment instead of having folks do it themselves?

$160 for YZ cams? Geez...I wouldnt be doing that mod either. Money's better spent on new tires, jets, hospital bills, and post-ride cocktails!

Anyhoo, check these mods out Bibmen and ask when you have a question. Again, from my viewpoint, throttle stop #1, re-jet the bike with YZ jets (or JD kit jets) #2, then the others as you see fit. Makes a WHALE of a difference...trust me. Different bike alltogether.

Good luck.

Late

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LarryCO,

One of your posts awhile back, you had ordered the JD kit. Have you tested it? If so how did it go. Are you getting to ride much in MN?

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Thanks for all of the info. As you might expect I sent Michelins to the dealer and told him he could keep the Dunlops. I really like the Enduro Comp III, its shorter, tighter lugs and soft rubber work real well in hard pack and on rocks.

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Hey LarryCo,

How's your bike performing at that lower altitude? Notice the increase in power with a little more oxygen huh. Good to see your post.

Yep, 81 today, 80 on Friday. :D We're getting a cold front moving through on Saturday. :) Will lower the temps to the 60's but will be back up into the 70's on Sunday. :D Late fall this year, Aspens are just now dropping their leaves.

Take Care :D

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Colorado is doing good this fall, the weather is holding, the aspens are turning, and the riding is good this year. Hope your finding the same out there!!!

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Nice guys...I'm definitely jealous!

Yeah, the bike's running VERY well with the jetting I've got now...and yes, more oxygen certainly helps! :) Got that JD kit...but havent put it in yet. Next weekend will only be the 4th ride of the season for me! Geez... :D Been working out of town during the week in CA, so time on the weekends has been scarce. Once I get a chance to try it out, I'll let ya all know how it compares with what I've got now.

On the positive side of things, we're renting a house right on the Mississippi River...so many a smallmouth bass has found their way onto the end of my fly line! And then there's CKULZER coaxing me to get studded tires so I can go ice riding once the lakes freeze...that should be interesting!

Anyhoo, things are going well...just not nearly as much time on the bike as I would like...but that'll change here soon I hope. Keep on riding Rampart/Georgetown/etc. before the weather gets bad and/or the next disgruntled forest service person burns it down!

Late

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