Yamaha WR450 supermoto project

12 replies to this topic
  • Daniello

Posted August 22, 2014 - 09:42 AM


Hi guys,

I recently sold my VTR SP1 racebike to get me a more fun and flickable bike for around town.

I bought a WR450f from 2006 in supermoto trim. The bike was ok overall, but could use some tlc to get it to my likings. The engine was overhauled last May, which the guy got a receipt from.

I rode it for a hour, and than began to tear it down.

Here are some pics:

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Frame and spring are already at the powdercoater. Frame gets a RAL 5022 coat and the spring gets a white coat.

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Sandblasted the enginecovers, sprayed them with heat resistant mattblack and baked them.

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New tyres are already in, Heidenhau K73's

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While waiting to get the frame back, I'm refreshing some electrical harness, freshing up the shocks with new oil, aso...

Edited by Daniello, August 22, 2014 - 09:46 AM.

  • italy899

Posted August 22, 2014 - 10:40 AM


I have a YZ400f that I would like to put slicks on; what tire and rim size would you suggest that I get?

  • Daniello

Posted August 22, 2014 - 03:12 PM


3.5J x 17 front
5.0J x 17 rear

120-70/17 front
160-60/17 rear

  • italy899

Posted August 22, 2014 - 03:37 PM


Thanks, your bike looks sweet btw... The only problem that I'm having now is the cost. Is it really worth it to buy everything preassembled or would it be cheaper to become a "scavenger" for complete wheel components?

  • YamaLink

Posted August 23, 2014 - 06:40 AM


Plans to track the WR like the VTR?

  • Daniello

Posted August 23, 2014 - 01:41 PM


Some more progress, while waiting for my frame...

Mounted all the covers back on the engine.
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Took the carb apart to do some good cleaning.
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Getting info from the forums about function aso from all the parts of the carb. Read some interesting things about unplugging the TPS and blocking off the AIV. Also found some nice jetting charts in the database here on TT. Also read the whole ' adjusting the AP' topic. The timing and duration of the squirt is fine, but is doesn't squirt the stated 6-8ft...the squirt just reaches the intake of the head...checked the AP membrane while cleaning the carb, and it's fine. Maybe there was some debris in the routing...I'll have to test it later on when I got the carb mounted again.

I know my way around a little with 2stroke carbs, but a 4 stroke carb is somewhat different ;)

Edited by Daniello, August 23, 2014 - 01:52 PM.

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  • Daniello

Posted August 23, 2014 - 01:45 PM


Btw does anybody know what needle came stock in these engines back in '06? This is what I found in the carb right now:

MJ 178
PJ 45
SJ 65
LJ 50
SAJ 80
BDDU needle 5th clip
2T OUT on fuelscrew

Sparkplug color:

ImageUploadedByThumper Talk1408830285.126949.jpg


Looks a little lean, or...

Edited by Daniello, August 23, 2014 - 01:53 PM.

  • Daniello

Posted August 27, 2014 - 04:28 AM


Frame and spring are in and the new tyres are on!

Reassembly can begin :)

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  • Daniello

Posted August 31, 2014 - 02:24 AM


Almost ready :) still have to do some small things to finish it, than I'll take better pictures.

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  • ThumpMe

Posted September 01, 2014 - 07:30 PM


THAT is one SWEET machine!   :thumbsup:

  • Daniello

Posted September 27, 2014 - 02:49 AM


Bike is 90% finished. 


Still have to do some little things, but for now its like this :)



  • Ro9

Posted October 11, 2014 - 05:23 AM


Really Nice bike man!! Any info about that oiltemp gauge on the engine? Any link to where to buy? :)

  • Daniello

Posted October 20, 2014 - 02:05 AM


Hi, the bike is sold again! I thought it wasn't that good for street use. The bike was nice for short rides, but when I wanted to ride a little longer than one tank, I was getting tired soon. Now there's a Aprilia SXV 550 in the garage ;) which I'm wrenching on (needs a new engine, not properly looked after). I hope this canon will give me satisfaction...

About the oil gauge...the thing came with the bike when I bought it. Maybe you can find something on eBay?


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