2003 Yamaha WR450F Big Bore Walk Around

I just bought a 2003 Yamaha WR450F with a 478 Big Bore Kit. The bike has a few quirks that will need to be addressed but I think this is a good project bike for the channel. The Yamaha WR450F is an extremely versatile platform that I want to use for everything from a road legal dirt bike to eventually a snow bike. Stay tuned!
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Thanks for watching!

[@rhiekel]

Haha I have the same bike . Bought it as a non running bike for 1800.. Had been sitting for 12 years. Cleaned the carb, new spark plug, started and ran perfectly. Then went all through the bike , completing all the electrical to make it a dual sport. So now has a license plate. Fun bike to ride !!

[@StockyBaldman]

Awesome

[@pavementsurfer10]

Good luck with the build. I have an 04 wr450 bought it with very low hours in 08 and knock on wood it still runs like a champ. I went super moto years ago and don't regret a second. Most fun on 1 wheel you can have! Go super moto you wont regret it.

[@StockyBaldman]

Awesome!

[@stefanmedlicott4948]

Looking forward to seeing the process of bringing her back and what improvements you do. Good all on the magic button as those big four strokes can be a bit finicky to start. Cheers!

[@StockyBaldman]

Thank you! I’m super pumped to get going on this. Starting work this weekend

[@javasoldier5926]

super old school Yamaha. Prob big bore kit need to rebalance the crank and tune a carburettor. You need to weigh the pistons 450 vs 475 if there is not a big difference its ok. If do nothing of this hard suff it will still run prob vibrations will be high up. I got a mechanic that install a piston from Yamaha 450 raptor to yz450 and I ride it. Vibrations was horrible((. Then he do a crank balancing and all become better

[@StockyBaldman]

Good to know thanks!

[@Agustin-jo8mv]

Dang. There is a local 2004 wr450f for sale. Street legal process already done. Stock looking, no serious mods. $3200. 🤔 Sounds like a good deal after watching this video. 😅

[@StockyBaldman]

USD or CAD? There were a couple of road legal units when I bought this for 5-6k

[@Agustin-jo8mv]

@@StockyBaldman usd

[@StockyBaldman]

Ya so the 2300 I paid for this is around 1700 usd. 3200 for a road legal still sounds pretty good though. I think they fixed the starter issue in 2004 also, good luck with it

[@Agustin-jo8mv]

@@StockyBaldman hmm. Interesting. I have a week to decide. Haha. I will probably go ahead and get it. I am in desperate need of a bike. 😅😅

[@Leon45.]

How often does it Need an oilchange onroad use? And how is the Rest Abort the Intervall of the Engine? (Sorry for my Bad english)

[@StockyBaldman]

The manual recommends to change the oil every thousand kilometres

[@Leon45.]

@@StockyBaldman Ohhh okay thanks

[@mudman6227]

2400 is a steal . Paid 4200 for my 2008 with 1700km

[@StockyBaldman]

Yeah it worked out pretty good

[@intuitivefugitive8852]

I will buy it if you ever want to part with it and start something g new. I really want one bad give me a good offer

[@StockyBaldman]

I appreciate the offer. I am absolutely in love with his bike and have it set up just the way I want it. I kind of love how it’s an old junker that I don’t have to worry about too much as well.

[@pdubowner]

Nice. I have a 2003 WR 450 also! I've been through it tits to tail and everything around.

[@StockyBaldman]

Awesome!

[@pdubowner]

@@StockyBaldman how's yours doing? I just put an engine in mine to buy me some time while I rebuild my stock engine.

[@StockyBaldman]

@@pdubowner I’m in the process of fixing some carb issues but she’s doing well for the most psrt

[@pdubowner]

@@StockyBaldman if you plan on using the electric start you should do the 2004 starter gear and cap, if you haven't already. What's going on with the carb?

[@StockyBaldman]

When I got it, it had been parked for a while and it wouldn’t idle. I cleaned out the pilot circuit and put a carb rebuild kit in it but there’s a lot of popping from on decel. I’ve been playing around with the jetting, but just can’t seem to get it yet.

[@mikebelperio2579]

Metoo

[@trashcan4698]

careful with those big bores kits, ive had a few where the cylinder jug cracks since the big bore makes the coolant pass throughs thinner

[@StockyBaldman]

Interesting. Was it a stock jug bored out?

[@trashcan4698]

@@StockyBaldman nope it was a new cylinder, had it happen to me once on my wr450 when it needed a new top end and i decided to go with a big bore kit and that was a mistake. i don't know how common this problem is but i came across this video on a guy with a yzf and he had the same thing happen with his big bore kit. link to that video, he starts talking about it at 48 minutes in. kzbin.info/www/bejne/fZyVg4h_o8iJnNU

[@StockyBaldman]

Wow thanks