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Related Garage

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Yamaha WR450F (2003)


Owner: ScubaruSteve
Added on January 16, 2017


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What did you do to your WR today?

Yamaha WR400F Yamaha WR450F


4439 replies to this topic
  • off_road_4_me

    Get Help Now

7,367 posts
Location: New Mexico

Posted September 13, 2009 - 03:05 PM


Posted Image

cleaned it, oil and oil filter change, chain tightened and lubed, i ran it out of fuel, gonna wait to ride so i can finish decking it out.

  • byggd

    TT Titanium Member

2,923 posts
Location: California

Posted September 13, 2009 - 05:40 PM


Posted Image

cleaned it, oil and oil filter change, chain tightened and lubed, i ran it out of fuel, gonna wait to ride so i can finish decking it out.


Very nice 426!!

  • off_road_4_me

    Get Help Now

7,367 posts
Location: New Mexico

Posted September 13, 2009 - 05:51 PM


its a mini wr :busted:

  • JSanfilippo

    Get Help Now

8,146 posts
Location: California

Posted September 14, 2009 - 02:52 PM


its a mini wr :thumbsup:


Its not the size that counts, its how you use it :busted:

I really should get around to ordering that 51 tooth sprocket...

  • byggd

    TT Titanium Member

2,923 posts
Location: California

Posted September 15, 2009 - 12:11 PM


its a mini wr :thumbsup:

So it's a 250? :busted:

  • off_road_4_me

    Get Help Now

7,367 posts
Location: New Mexico

Posted September 15, 2009 - 01:50 PM


si senor

today i looked at it when i got home from school, then i went inside

  • WR450Fridin

    TT Newbie

24 posts
Location: Virginia

Posted September 16, 2009 - 05:31 PM


got a rejection sticker:bonk: for no license plate light:banghead: then to top it of i got a flat on the way home :busted: i later found a 3 inch screw in my tire. hopefully shes all better for a nice ride this weekend

  • tribalbc

    TT Addict

4,971 posts
Location: British Columbia

Posted September 17, 2009 - 06:39 AM


Pulled the pin and ordered up a bunch of parts for this falls rebuild/ upgrade :busted:

YZ cams
Cam chain
JE 13.5-1 HC piston
GYTR clutch basket, inner hub and pressure plate along with full set of OEM plates and springs. My old inner and outer hub is heavily notched. This was the big expense hopefully it's worthy......

Rebuild time coming some time around the end of Oct......

  • 123BigcoopDawg576

    TT Titanium Member

2,664 posts
Location: Other

Posted September 17, 2009 - 06:48 AM


Pulled the pin and ordered up a bunch of parts: YZ cams


Cant wait to see how the E-Start treats you...Im on the fence about ordering a set

BTW what year did you go with?

  • tribalbc

    TT Addict

4,971 posts
Location: British Columbia

Posted September 17, 2009 - 07:21 AM


Cant wait to see how the E-Start treats you...Im on the fence about ordering a set

BTW what year did you go with?


08's as I got the 2 of them for less than the price of one new one from a TT'er.
I was just planning on getting an intake untill I found this deal. So I figure I can try it first with both and if I have E-start issues switch over to just the intake.
I'm hoping though that the HC piston will raise compression enough that the e-start will work :busted:

  • 123BigcoopDawg576

    TT Titanium Member

2,664 posts
Location: Other

Posted September 17, 2009 - 07:24 AM


I'm hoping though that the HC piston will raise compression enough that the e-start will work :thumbsup:


Thats a thought :busted:

BTW I was under the impression that all the power gains came from the exhaust cam NOT the intake???

  • tribalbc

    TT Addict

4,971 posts
Location: British Columbia

Posted September 17, 2009 - 07:30 AM


Thats a thought :busted:

BTW I was under the impression that all the power gains came from the exhaust cam NOT the intake???


Well according to motor builders SJMC Don knows the intake cam + HC piston is the hot ticket in the WR with no e-start issues.
In the August DB LA Sleeve also built a WR with just intake + HC and some head porting and was amazed with the power. They claimed as well that good gains could be realized with just the intake swap.

  • 123BigcoopDawg576

    TT Titanium Member

2,664 posts
Location: Other

Posted September 17, 2009 - 07:38 AM


Well according to motor builders SJMC Don knows the intake cam + HC piston is the hot ticket in the WR with no e-start issues.
In the August DB LA Sleeve also built a WR with just intake + HC and some head porting and was amazed with the power. They claimed as well that good gains could be realized with just the intake swap.


Interesting...Are you going to be able to run pump gas with the HC piston?

  • tribalbc

    TT Addict

4,971 posts
Location: British Columbia

Posted September 17, 2009 - 07:45 AM


Interesting...Are you going to be able to run pump gas with the HC piston?




Everyone says pump, but you never really know do you......

This was a big issue for me untill I found out yesterday you can now get race gas in my little town :busted:

I figure worst case scenario I will have to use 1 part race gas to 2 parts 91 pump.

Obviously would be a pain on long dualsports :thumbsup:

  • 123BigcoopDawg576

    TT Titanium Member

2,664 posts
Location: Other

Posted September 17, 2009 - 07:56 AM


Obviously would be a pain on long dualsports :thumbsup:


I heard that :busted:

But then again, I have run some nasty Mexican gas in Baja and NEVER had an issue.

  • tribalbc

    TT Addict

4,971 posts
Location: British Columbia

Posted September 17, 2009 - 08:07 AM


I heard that :busted:

But then again, I have run some nasty Mexican gas in Baja and NEVER had an issue.


They seem to be pretty tolerant stock. I know I've had to run 87 before and had no issues.

When I had my old Husaberg that needed a minimum of 95 I used to have to carry a bottle of octane booster around when I went Dual Sporting :thumbsup:

  • canyonclimb

    TT Member

50 posts
Location: Utah

Posted September 25, 2009 - 08:41 PM


I put the dunlop geomax mx51 on my rear. thought I would give it a go and see what the hype is all about. Can't wait to get it out and test it next week.

  • jayh300

    TT Platinum Member

1,861 posts
Location: Texas

Posted September 26, 2009 - 09:29 AM


put michelin m12's on it, fork seals, general stuff...
can't wait to ride.........

  • ch_250

    TT Bronze Member

314 posts
Location: Ontario

Posted September 27, 2009 - 06:05 PM


wheelied it into the sidewall of a rut after a river crossing. broke the front fender. i also did some new and exciting hills, woot woot.

  • bloodline

    TT Bronze Member

263 posts
Location: South Carolina

Posted September 29, 2009 - 05:05 AM


Over the last couple of days...

New set of dunlops. New front wheel bearings (that sucked). New mylers radiators. They are awesome. New Unabiker guards. Replaced timing chain. Engine is much quieter now. Cam cap bolt came out with the threads attached!!!. Fixed that. Found out that the '03 and the '04 use a different flywheel puller. that sucked. New Pro taper woods high and pro taper upper triple.

Set it for YZ timing. Wouldn't start. Oh yeah, turns out this was actually an '03 bike. Fixed that.

Ran it about 40 miles and didn't take a soil sample. A good week.





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