My WR450 25 pound trim off...

Yamaha WR450F

434 replies to this topic
  • RockerYZWR

Posted September 04, 2014 - 07:33 AM


The guy at 1:23 in the first video needs YZ cams!



  • KennyMc

Posted September 04, 2014 - 09:41 AM


The guy at 1:23 in the first video needs YZ cams!

:lol: Shane Watts riding school gift card :smirk:

  • bradgross71

Posted September 05, 2014 - 04:19 AM


It's simple. Will any given bike make a guy beat his buddy's that he normally can't? No!! Will a 30 pound lighter bike make any given guy faster than he was? Yes!! I have a very well set up 13 wr450 that I put on a diet that I can hall ass on. Just bought a yz250f for shits and giggles, I am way faster on the 250. Anybody want to buy a wr? :)

  • avlisj

Posted September 05, 2014 - 07:01 AM


It's simple. Will any given bike make a guy beat his buddy's that he normally can't? No!! Will a 30 pound lighter bike make any given guy faster than he was? Yes!! I have a very well set up 13 wr450 that I put on a diet that I can hall ass on. Just bought a yz250f for shits and giggles, I am way faster on the 250. Anybody want to buy a wr? :)


Maybe you just feel faster cause your reving the shit out of it and shifting every 50 ft.
Sure is easier to lift you that 450 though

  • bradgross71

Posted September 05, 2014 - 07:54 AM


Maybe you just feel faster cause your reving the shit out of it and shifting every 50 ft.
Sure is easier to lift you that 450 though

u ever ride a 250?

  • GP1K

Posted September 05, 2014 - 08:22 AM


Maybe you just feel faster cause your reving the shit out of it and shifting every 50 ft.
Sure is easier to lift you that 450 though

 

Nope, I'm way faster on my 250 as well, and not revving the shit out of it nor shifting every 50 feet. MX track would be a different story, but not in the woods. I do rev a little more and shift a little more, but it's not that significant of a difference.



  • bradgross71

Posted September 05, 2014 - 08:36 AM


Nope, I'm way faster on my 250 as well, and not revving the shit out of it nor shifting every 50 feet. MX track would be a different story, but not in the woods. I do rev a little more and shift a little more, but it's not that significant of a difference.

i expected to shift and rev a lot more but was super happy to find out that is not the case. I'm 155 pds so that helps.

  • 080

Posted September 05, 2014 - 09:00 AM


  Will a 30 pound lighter bike make any given guy faster than he was? Yes!!

 

That is debatable to circumstance, it depends on the terrain and at what speeds your going through at. The slower you go and the more you have to pick through the terrain, the lighter bike will benefit. The faster you go and the harder objects are hit at speed, it will benefit the heavier bikes. I've never seen an Xr650 win an extreme endure nor a 250f win a Baja.



  • DRS

Posted September 05, 2014 - 10:18 AM


kudos for all the work you have accomplished but common sense and decades of experience tells me that making a wr450 into a "tight" woods racer is a pure pipe dream for a bored tinkerer with a great garage and too much time on his/her hands. *shrug* not trying to be a prick, but IMO there are just so many other bikes better suited for tight woods racing than one of the chubiest 450 competition-esque offroad bikes available, regardless of whether or not it went on a -25lb diet, it's pretty amazing that you trimmed 25lbs off but i'd still think it would feel porky to me, i've ridden a lot of different bikes in the tight woods and the wr would be the last choice if i was choosing a tight woods race platform.  it just feels so much more like an open terrain bike to me than other bikes i've ridden..  *shrug*


Edited by DRS, September 05, 2014 - 10:18 AM.


  • bradgross71

Posted September 05, 2014 - 10:39 AM


kudos for all the work you have accomplished but common sense and decades of experience tells me that making a wr450 into a "tight" woods racer is a pure pipe dream for a bored tinkerer with a great garage and too much time on his/her hands. *shrug* not trying to be a prick, but IMO there are just so many other bikes better suited for tight woods racing than one of the chubiest 450 competition-esque offroad bikes available, regardless of whether or not it went on a -25lb diet, it's pretty amazing that you trimmed 25lbs off but i'd still think it would feel porky to me, i've ridden a lot of different bikes in the tight woods and the wr would be the last choice if i was choosing a tight woods race platform. it just feels so much more like an open terrain bike to me than other bikes i've ridden.. *shrug*

what would you first and second choice be?

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  • DRS

Posted September 05, 2014 - 10:53 AM


what would you first and second choice be?

 

--my 2T choices  -this is a toss up, but i really prefer the ktm clutch feel.

1st: ktm 250xc

2nd: yami yz250

 

-my 4T choices

1st: ktm 350xcf

2nd: yami yz250f or ktm 250xcf

 

and yes, i'm a big ktm and yamaha fan, i think both manufactures have been solid for last 10+ years.


Edited by DRS, September 05, 2014 - 10:54 AM.


  • RMK800

Posted September 05, 2014 - 02:38 PM


--my 2T choices -this is a toss up, but i really prefer the ktm clutch feel.
1st: ktm 250xc
2nd: yami yz250

-my 4T choices
1st: ktm 350xcf
2nd: yami yz250f or ktm 250xcf

and yes, i'm a big ktm and yamaha fan, i think both manufactures have been solid for last 10+ years.


Interesting you take the KTM 250 XC over the 300 XC.

  • DRS

Posted September 05, 2014 - 03:19 PM


Interesting you take the KTM 250 XC over the 300 XC.

 

i know the 300 2t is a very popular powerplant in the high mtn extreme enduro competitions and it might just be pure preference, but i've never really liked riding a 4t in tight technical stuff, and to me the 300 rides like a 450 4t, just lighter.  but then again, i don't consider extreme enduro to be tight, just gnarly sections with frequent uphills and downhills, where a 300 2t would certainly shine because it chugs and has grunt like a 450 4t, but is much lighter.  

 

i feel like i can still rev the snot out a 250f or 350f and ride it hard sort of like i would ride a 250 2t trying to go very fast in the tight woods.  whereas a 450 or even the 300 might get away from me and wear me out more if i'm not more mindful of the power it puts to the ground.  i've ridden the 300 a fair amount in the woods and it just feels like too much in tight single track, much like any 450 does.    *shrug*


Edited by DRS, September 05, 2014 - 03:20 PM.


  • avlisj

Posted September 05, 2014 - 04:23 PM


u ever ride a 250?


Rode a 02 rm 250 for 10 yrs before the wr. Now I can ride the trails in 3rd gear all day long"tight woods". Plenty of snap and will pull day.
Considered a 250 4t but was told more frequent rebuilds due to motor strain compared to 450 if I rode it like my RM. Plus got it plated. Wanted FI, green sticker and $3k cheaper than ktm. Had no choice. If I didn't live in CA I would have a 300 2t. Fuel injected 2t comes out. I'm first in line.

  • bradgross71

Posted September 05, 2014 - 05:17 PM


Rode a 02 rm 250 for 10 yrs before the wr. Now I can ride the trails in 3rd gear all day long"tight woods". Plenty of snap and will pull day.
Considered a 250 4t but was told more frequent rebuilds due to motor strain compared to 450 if I rode it like my RM. Plus got it plated. Wanted FI, green sticker and $3k cheaper than ktm. Had no choice. If I didn't live in CA I would have a 300 2t. Fuel injected 2t comes out. I'm first in line.

I have a 13 wr450 and a 13 yz250f. I can ride the 250 real close to the same as the 450. Mostly 3rd and sometime jump to fourth. Thats the area I ride and the weight I ride at. I have the 450 down to at least 250 pds, maybe 247

Edited by bradgross71, September 05, 2014 - 05:18 PM.


  • avlisj

Posted September 05, 2014 - 05:56 PM


I have a 13 wr450 and a 13 yz250f. I can ride the 250 real close to the same as the 450. Mostly 3rd and sometime jump to fourth. Thats the area I ride and the weight I ride at. I have the 450 down to at least 250 pds, maybe 247


How did you shave the wieght. Kinda of enjoy the heavy bike. I can speed through some gnarly square edge stuff that would have ricochet the RM. Actually feels like less work to ride the 450 also. Ride a gear up. Use the clutch to eliminate engine brake don't have to work so much to stay in the right gear.

  • KennyMc

Posted September 05, 2014 - 09:25 PM


I have a 13 wr450 and a 13 yz250f. I can ride the 250 real close to the same as the 450. Mostly 3rd and sometime jump to fourth. Thats the area I ride and the weight I ride at. I have the 450 down to at least 250 pds, maybe 247

Weight based on actually weighing the bike?

  • bradgross71

Posted September 06, 2014 - 02:58 AM


Weight based on actually weighing the bike?

haven't weighed the bike. Based it on shipping weight ( no gas) and what I have taken off. Shipping weight is stated at 261 and dirt rider (I think) did a shootout of the class and weighed all the bikes without gas. There number was real close to the 261 so I figure it's probably accurate.

  • MidlifeCrisisGuy

Posted September 08, 2014 - 09:00 AM


--my 2T choices  -this is a toss up, but i really prefer the ktm clutch feel.

1st: ktm 250xc

2nd: yami yz250

 

-my 4T choices

1st: ktm 350xcf

2nd: yami yz250f or ktm 250xcf

 

and yes, i'm a big ktm and yamaha fan, i think both manufactures have been solid for last 10+ years.

 

I rode with a KTM200 XC yesterday.   Rider of my ability or better.   I left him in the dust twice.  And he was red faced at the stops.

 

My vet expert friend has a big bore YZ250F set up for woods.   I think my bike is on par with his.  We plan to ride and swap in a couple weeks.

 

My WR is now about the same weight as the KTM 350XCF.  Similar geometry too.  22mm offset TC makes a huge difference in how the WR handles.

 

The 2012+ WR450F uses the 2010 YZ250F frame.  If you get the weight down on the WR450F and work on a few other things, its a really good woods bike, especially for bigger guys.   If I was 150 pounds I wouldn't be riding a 450F either.   But when you are 200+ pounds, those small 2 strokes feel like mini bikes. 

 

My 450F is planted.  Small bikes are ricocheting off everything in sight.  I can pick a line and hold it.  Braaap.     FWIW, I only felt this way after getting the steering sorted out.   Prior to that it  was ponderous and slow.


Removals

Done: Starter: 1.63 lbs
Done: Starter idler gears: 1.05 lbs
Done: Tank mount bracket: 0.39 pounds with the 4 bolts
Done: Starter switch and harness to right side rad mount 0.11 lbs
Done: Boil off vent hose, tank to under bike, 0.15 lbs
Done: Head light assembly 1.45 pounds (gross or net of number plate ?)
Done: Reflectors: 0.72 pounds
Done: Trip computer assembly: 0.88 pounds
Done: Battery: 4.60 pounds
Done: Snorkel: 0.52 pounds, with screws
Done: Starter relay, cables, isolator rubber, other relays, etc.  0.88 pounds.
Done: Boil off bottle and connector hose: 0.52 pounds
Done: Battery tray, boil off bottle fender plastic, ECM rubber isolator: 0.44 pounds
Done: Breather reduction off starter port.  0.13 pounds gross, about 0.12 pounds net
Done: Throttle body harness holder.  0.06 pounds
Done: Front brake line bracket  0.13 pounds
Done: Skid plate rubber block    0.11 pounds
Done: Aluminum rear sprocket 1 pound net.   stock 1.78 pounds - new 0.78 pounds
Done: Starter clutch and gear. 1.45 pounds, lighter flywheel and less gyroscopic mass as well.
Done: Handlebar ends trimmed off.  0.06 pounds
Done: kickstand 1.16 pounds
Done: muffler 7.45 stock - 5.28 FMF + differences in SAs = 2.20 (assumes quiet core = spark arrester)
Done: rear tail light: 0.40 pounds
Done: lean angle sensor and bracket: 0.37 pounds
Done: Magura clutch: 0.20 pounds (0.97 for stock - 0.77 Magura)
Done: Remove cluch cable guide and capacitor bracket 0.11 pounds
Done: Removed the WR kickstand peg mount.  1.05 pounds - 0.39 = 0.66 pound loss.  Flipped the mounts too.
Done: Remove the number plate mounts I built
Done: Removed speedo drive 0.55 pounds, 0.30 pounds net
Done: Moved coil to the right side of the bike, 0.44 pounds lost
Done: Removed side number panels, 0.83 pounds lost with bolts (0.30 left, 0.48 right + bolts)
Done: Removed front number panel, 0.41 pounds (might be double counted ?)
Done: Removed voltage regulator mount from frame head, 0.15 pounds, less new bolts to remount it. 0.14 pounds net
Done: Removed wiring harness ends 0.25 pounds

Total stock weight loss 23.65 pounds.   260 - 23.65 = 236.35 pounds, dry, before additions and swaps.

Additions
Hand guards were 0.48 x 2 + .24 lbs for mounts = 1.2 pounds

Total stock plus addition weight: 237.55 lbs.

Swaps:

(From manufacturers specs or guesses, not weighed)

Done: IRC 140 M5B for 120 MX51 rear tire.  14 pounds - 12.75 pounds = +1.25 pounds
Done: ICR Vulcanenduro VE35F for MX51 front tire =  9.06 poounds - 8.6 pounds = +0.46 pounds
Done: Racetech 6.0 Kg rear spring for Yamaha 5.6 Kg rear spring = +1 pound ?
Done: Racetech 0.5 Kg fork springs for Yamaha 0.46 Kg fork springs = + 0.5 pounds ?
Done: 2010 YZ 450F triple clamp for WR triple clamp = 0 pounds

Total swap weight: 3.21 pounds

Total weight after additions and swaps, no fuel:  240.76 pounds.

 

The pre swap number is the one to use when comparing my bike to manufacturer's weight, because I'd be doing the swap stuff on any bike.


Edited by MidlifeCrisisGuy, September 08, 2014 - 09:11 AM.


  • MidlifeCrisisGuy

Posted September 08, 2014 - 09:05 AM


Tidbits...

 

The bolts that hold the rad plastic and seat on weight 0.15 pounds, with a couple of the aluminum bolt inserts (washers) from the rad.

 

The WR450F valve cover weighs 0.52 pounds.

 

The WR450F seat assembly weighs 2.91 pounds.







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