13oz weight w/ rekluse(standard)


17 replies to this topic
  • sherco67

Posted January 25, 2008 - 02:56 PM

#1

has anyone done this, any changes good, bad or otherwise let me know, thanks

  • HodaddyB

Posted January 26, 2008 - 06:45 AM

#2

Yep, I'm running that very set-up on 2t YZ250 if that's any help.

  • 642MX

Posted January 26, 2008 - 09:14 AM

#3

has anyone done this, any changes good, bad or otherwise let me know, thanks


What bike?

  • sherco67

Posted January 26, 2008 - 01:23 PM

#4

06 yz450f

  • grayracer513

Posted January 26, 2008 - 05:27 PM

#5

Who makes a 13 ounce weight for an '06?

  • 642MX

Posted January 26, 2008 - 06:06 PM

#6

Why would you need extra weight with the Rekluse?

  • grayracer513

Posted January 26, 2008 - 07:28 PM

#7

Why would you need extra weight with the Rekluse?

The engine pulls more smoothly at low RPM with more weight. I have the Off-Road GYT-R on my own '06, and it makes a difference. One thing here is that your perspective is that of a 426 rider. That bike, as light as the rotating mass seems to an old school guy like me, still has more crank/flywheel inertia that the YZ450 in any year model. On the 450, it can only make things better. I don't see any measurable or perceived loss in performance with the weigh at all.

  • 642MX

Posted January 26, 2008 - 07:35 PM

#8

The Rekluse adds 6 oz of flywheel effect to the bike, so I didn't think any additional weight was necessary (even with the 450's).

Without an auto-clutch I can see where a flywheel weight would be a benefit, but the Rekluse will slip the clutch and let the bike lug without stalling.

Honestly, I could probably use a little less flywheel on my bike. The 444 kit makes it a little slower to rev than the stock bore.

  • love2strokes

Posted January 26, 2008 - 07:45 PM

#9

I'm running an 11 oz stealy and a rekluse pro, and it is still strong through out the rev range. (i'm on a 05 yz250 2t)

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • grayracer513

Posted January 26, 2008 - 08:23 PM

#10

The Rekluse adds 6 oz of flywheel effect to the bike, so I didn't think any additional weight was necessary (even with the 450's).

Unless the Rekluse weighs something like 32 ounces more than the components it replaces, it can't add that much weight. This is because the added weight of the clutch acts on the crank only through a reduction gear with a 2.626:1 ratio, and turns 2.6 times slower. It is therefore easier for the engine to accelerate the additional weight, much more difficult for the inertia mass of the clutch to drive the crank on coast, and the lower speed at which it spins reduces its inertia exponentially.

  • HodaddyB

Posted January 27, 2008 - 06:28 AM

#11

I originally purchased my 13oz weight for flat track racing, to help tame the wheel-spin (as stated before, this is an '02 YZ250 2t). I later began to race the bike in supermoto, with and w/out the weight. I left it reinstalled (once again) to help tame wheel spin.
To be able to run next to the largest machines, I bored and stroked it to a 300, and again, tried the bike with and w/out. I preferred the feel of the weight, making it more tractable, however, there was still the pesky wheel-spin.
I decided to try the Rekluse as a way to try and tune out the wheel-spin, w/out having to play w/ the clutch. It's fantastic.
Again, I tried the bike with and w/out the weight, and opted to reinstall the weight.
I'm just going to spitball here, but for 4t bikes, I don't believe I'd see a need for more weight unless I was doing East Coast type single track w/ the mud, roots, and technical wet rocky sections. I've ridden my 525, and few 450s in the desert out here, and they seem fine as is.
YMMV

  • HodaddyB

Posted January 27, 2008 - 06:34 AM

#12

The Rekluse adds 6 oz of flywheel effect to the bike, so I didn't think any additional weight was necessary (even with the 450's).

Without an auto-clutch I can see where a flywheel weight would be a benefit, but the Rekluse will slip the clutch and let the bike lug without stalling.

Honestly, I could probably use a little less flywheel on my bike. The 444 kit makes it a little slower to rev than the stock bore.


The perceived benefit for me, is that the bike doesn't rev into and through the engagement so quickly. You're probably right...........your 4t most likely doesn't need it.

  • 642MX

Posted January 27, 2008 - 07:08 AM

#13

Unless the Rekluse weighs something like 32 ounces more than the components it replaces, it can't add that much weight. This is because the added weight of the clutch acts on the crank only through a reduction gear with a 2.626:1 ratio, and turns 2.6 times slower. It is therefore easier for the engine to accelerate the additional weight, much more difficult for the inertia mass of the clutch to drive the crank on coast, and the lower speed at which it spins reduces its inertia exponentially.


I'm not sure how heavy it is. Its significantly heavier than the stock pressure plate. 5 of the 30 balls weighs more than the pressure plate. Rekluse is who told me it adds 6 oz of flywheel effect.

It does make a noticeable difference in how fast the bike revs. :cool:

  • ncmountainman

Posted January 27, 2008 - 08:36 AM

#14

Unless the Rekluse weighs something like 32 ounces more than the components it replaces, it can't add that much weight. This is because the added weight of the clutch acts on the crank only through a reduction gear with a 2.626:1 ratio, and turns 2.6 times slower. It is therefore easier for the engine to accelerate the additional weight, much more difficult for the inertia mass of the clutch to drive the crank on coast, and the lower speed at which it spins reduces its inertia exponentially.


al from rekluse once told me it adds around 6oz actual and about 2 oz of perceived fww:thumbsup: i run mine with a +6 on my 05 450 and am quite happy,if it gets real sloppy i just dial in more traction control on the vortex

  • eazrider

Posted January 28, 2008 - 06:34 AM

#15

I had an 11 ounce flywheel on my '04 and loved the way it smoothed out the power. I installed a Rekluse, and didn't like the sluggish feel of the combination of the 2 weights. I put the stock flywheel back on, with the Rekluse clutch, and it was snappy, yet still tractable, out of the corners.

  • yz4fun

Posted February 06, 2008 - 06:43 PM

#16

I have the GYT-R off road fww 6 or 8 oz? I cant remember the exact weight,in my 04 450 and i also have the recluse w\perch adjuster and it made no difference in power delivery,between the stock clutch or the recluse,The bike flat out rips.:busted:

  • grunkthump

Posted February 07, 2008 - 06:02 AM

#17

is anyone running a GYTR 9oz. AND a rekluse pro on an 06' or 07'??

  • birdland101

Posted April 15, 2008 - 07:32 PM

#18

I had an 8oz with a rekluse pro on my 07 rm250 and it was gutless pulling up hills, had to work the clutch to get it up to speed. The flywheel weight came off for sure and even with the rekluse, I still would like it to be snappier again, so I am debating the necessity of the rekluse at this time...





Related Content

Forums
Photo

James Stewart back on a YZ450F by YamaLink


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies
Reviews

Yamaha YZ450F 2017 by Chris.GVS


Yamaha YZ450F 2017
  • - - - - -
  • 0 reviews
Forums
Photo

2016 YZ450 by CaptainKnobby


Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies
Forums
Photo

Michigan Motocross Tires by 288yz450


Dirt Bike   Dirt Bike Regional Discussion   North
  • 1 reply
Forums
Photo
Motocross

Thinking about Yamaha 250... by Arctic Pride


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  491 replies
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.