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  #21  
Old 04-07-2016, 04:26 AM
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Quote:
Originally Posted by dogger315 View Post
Looks like some good progress on your build. How many wheel spacer combos
did you go through before you found a winner? I don't know if it's the angle,
but your rear sprocket looks really close to the swingarm in that chain
alignment picture.

Do not try to bend that brake pedal cold. You're going to have to heat it with
something like a map gas (low heat), torch then bend it twice. One bend
close to the pivot and another bend to bring the rest of the lever parallel to
the clutch cover. It will be interesting to see if you can find an existing brake
pedal that will clear the larger CR250 clutch cover and still work with the CRF
style pivot bolt. That strategy didn't pan out for me and the CRF250 frame,
I had to modify a CRF250 pedal. The OE head stays are "S" shaped because
the frame mount is offset from the head mount on any Honda with a CR250
engine.

Looking forward to your next update.

The 2006 CR250 swingarm spacer partnumber I found on exxtrememx.com.
Swingarm and rearwheel with spacers are taken directly from my 2009 CRF 450, so it must be the angle of the photo.
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  #22  
Old 04-07-2016, 11:08 AM
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From what I have in my collection it looks like brake pivot bolts come in 3 flavors; (from left to right in the pic)
8mm Stud / 23mm Shoulder (02-04 CR250)
8mm Stud / 19mm Shoulder (04-05 CRF250R)
10mm Stud / 19mm Shoulder (06-08 CRF250/450R)

Which do you have?


Last edited by Faded; 04-08-2016 at 10:15 AM.
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  #23  
Old 04-07-2016, 01:36 PM
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Quote:
Originally Posted by Faded View Post
From what I have in my collection it looks like brake pivot bolts come in 3 flavors; (from left to right in the pic)
8mm Stud / 23mm Shoulder (02-04 CR250)
8mm Stud / 19mm Shoulder (04-05 CRF250R)
10mm Stud / 19mm Shoulder (06-08 CRF250/450R)

Which do you have?


https://goo.gl/photos/ThMnVWouZ8ZPmraPA


Here is mine (2009 CRF450R)
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  #24  
Old 04-07-2016, 01:45 PM
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The diameter of the pivot is all the same on the ones I have, but I need to know how wide is it on yours? From the inside of the flanged head to where the threads start? Looks like it's a 19mm one...
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  #25  
Old 04-07-2016, 03:17 PM
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Quote:
Originally Posted by Faded View Post
The diameter of the pivot is all the same on the ones I have, but I need to know how wide is it on yours? From the inside of the flanged head to where the threads start? Looks like it's a 19mm one...
Yes it is 19mm
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  #26  
Old 04-07-2016, 04:59 PM
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Quote:
Originally Posted by Trusa View Post
Yes it is 19mm
Your only real option is the 450X brake pedal then, the CR250 uses a 23mm wide pivot but only an 8mm stud, not the 10mm on your bike.
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  #27  
Old 04-07-2016, 08:37 PM
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Yes they are off set for a reason. It affects handling. They do a lot of testing so that they can get the frame to flex in a desirable way. Personally I would make them like oem and off set the piece that is getting welded to the frame if you can.
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  #28  
Old 04-08-2016, 10:14 AM
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Made a few phone calls and a couple visits with some friends to get this info sorted and get you some pics.

Like I mentioned before, the pedal/pivot bearing surface comes in two widths, 19mm which looks to be exclusive to the CRF models, and 23mm which looks to be exclusive to the CR models. Next is the pivot bolt's thread/pitch, again there are two choices between an 8mm stud and a 10mm stud. Changes occured between 2004-2006 depending on model, for example an 02-03 CR250 uses an 8mm stud while 04-07 CR250 uses a 10mm stud (all on a 23mm wide pivot). On the other hand an 04-05 CRF250R uses an 8mm stud and 06-newer uses a 10mm stud (all on a 19mm wide pivot).

Clear as mud I'm sure. Now for some pics that pertain to your swap...


2011 CRF450R Stock Pedal;




Measurement for reference;




2011 CRF450R w/2009 CRF450X Pedal;




(Looks like it gets you an additional +10mm)




The bend looks to be about the same between the CRF450X pedal (left) and a stock CR250 pedal (right). The only difference is the pivot width (19mm CRF vs. 23mm CR) as mentioned before.




Also, with the 04-07 CR250 set-up using a 23mm wide pedal pivot and a 10mm stud that option should get you and additional 4mm clearance if needed at the expense of the entire pedal sitting 4mm further outboard of where it mounts to the frame.

(2006 CR250 for reference)


Last edited by Faded; 04-08-2016 at 10:29 AM.
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  #29  
Old 04-08-2016, 12:41 PM
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This awesome!! You just saved me a bunch of time and frustration!

This is the kind of problem I didn't even think about when I started this build.


I think the CRF450X pedal will clear the clutch cover. I will take a closer look on monday.
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  #30  
Old 04-08-2016, 01:08 PM
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I'm working on a couple swaps myself so I needed to figure it out and get it documented. If the 450X pedal doesn't clear I think you have a problem elsewhere, lol!
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