00 RM125 USD Swap

48 replies to this topic
  • taco250

Posted 31 January 2012 - 09:29 AM

#21

View PostLane_N, on 31 January 2012 - 09:10 AM, said:

As usual Red is on target. I'm using a Trailtech Vector Speedometer. I just installed a set of Highway Dirtbikes Handguards, they are awesome. I have a weird bolt pattern on my bar clamps so I ended up having to make my own top clamp as HDB didn't accomodate my funky spacing. I'm mounting my Vector to the top clamp just like the HDB system does. I'm doing a homebrew LED dash built into my top clamp, still in progress. I ditched my factory ignition switch for a very small 2 wire one since I don't have the fork lock option anymore. I drilled and tapped a couple of holes in the front face of the top triple to remount the stock XR headlight bracketry, I am also fabbing up a small bracket to mount to the bottom triple to hold the bottom of the plastic headlight cover/numberplate. I built my own turn signal mounts, the bolts are on the sides of the RM triples versus the front on the XR's so the L configuration isn't what I needed. It is just a flat plate with a slotted hole on about a 30° angle to locate the turn signals. I'll take a few closeup pictures and post up so you can see what I'm talking about later on tonight. All in all a pretty simple swap, but lots of little details that have to be taken care of. I am a tinker by nature and like to build stuff. Most of this could have been done more simply, but where is the fun in that?

So true. I would appreciate the pics when you get them. Do you think it would've been easier with cr125/250 forks/clamps? What about the "conversion" bearings you mentioned? Got a link? Thanks.

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  • XR650LANE

Posted 31 January 2012 - 09:58 AM

#22

Taco, Allballs is the company that makes the conversion bearings. They don't make one for the 99-00 RM to XR650L anymore, which is why I went the way I did with the bushing on my stock XRL stem. I haven't done the CR swap, so I can't say for sure on which is easier. The option of keeping your stock speedo could be a plus with the CRF450 parts. I do know that the way I did it is bullet proof and I'll be able to find replacement steering head bearings anywhere if I should need them. If you end up with the conversion bearings, who knows if you'll be able to get another set someday when you need them?

  • ThumpNRed

Posted 31 January 2012 - 10:52 AM

#23

I suspect the reason that All Balls stopped listing the bearing set is because they were not a plug and play operation. As I found out, you have to do some creative problem solving to get them to work. I am pretty sure that they still sell the bearing set as they were used in numerous other applications. I think they just removed the XRL/RM option from the catalog. Having gone that route, I would probably opt for the custom stem if I were to do it again.

To answer Taco's question. It may have been easier to use CRFX forks, as you could then maintain the speedo. The Honda forks are smaller diameter than the 49mm RM fork legs... The RM forks are about the largest diameter OEM forks that you will find.
I think in the end, you can use just about any set of forks that you can readilly get your hands on. Granted, you may muck up the handiling characteristics of the bike if you end up altering thefront end geometry too much. I used the RM forks because I got them for a killer deal. Worse case scenario, you have to have a custom stem built for the swap.

  • XR650LANE

Posted 31 January 2012 - 10:03 PM

#24

Here are a few pictures, you can see the two bolts Holding the stock headlight bracket to the top clamp. I drilled and tapped a couple of 6mm holes to attach this
Posted Image
Here is the new bracket I mounted my turn signals with. It is a little scrap of .250 Aluminum plate. The stock RM triples have the bolts in the sides instead of in the front.
Posted Image

  • taco250

Posted 01 February 2012 - 09:55 AM

#25

View PostThumpNRed, on 31 January 2012 - 10:52 AM, said:

I suspect the reason that All Balls stopped listing the bearing set is because they were not a plug and play operation. As I found out, you have to do some creative problem solving to get them to work. I am pretty sure that they still sell the bearing set as they were used in numerous other applications. I think they just removed the XRL/RM option from the catalog. Having gone that route, I would probably opt for the custom stem if I were to do it again.

To answer Taco's question. It may have been easier to use CRFX forks, as you could then maintain the speedo. The Honda forks are smaller diameter than the 49mm RM fork legs... The RM forks are about the largest diameter OEM forks that you will find.
I think in the end, you can use just about any set of forks that you can readilly get your hands on. Granted, you may muck up the handiling characteristics of the bike if you end up altering thefront end geometry too much. I used the RM forks because I got them for a killer deal. Worse case scenario, you have to have a custom stem built for the swap.

Did yours change much?

  • XR650LANE

Posted 01 February 2012 - 10:14 AM

#26

So far I've only been for a few short rides, nothing negative in anyway to report. I resprung my shock with a 12.0 kg/mm eibach and cut 1 coil off of the RM125 fork springs ( they are now ≈.45 kg/mm rate) when I rebuilt them so the new spring rates are also a factor for me. My static and race sag sets up perfect with these springs for me. I love the way it feels so far. Hopefully Red can chime in he has flogged his bike and he seems to like his 49mm USDs too.

  • ThumpNRed

Posted 01 February 2012 - 02:23 PM

#27

I dont notice much of a change in steering.It seems steers a bit "quicker" than previously, but that could well be a product of less twist in the forks. I had a bit of headshake at speed previously... has not changed... she'll still make me pucker tight every once in a while when I get going faster than I should in the loose stuff. The forks do make the rear end seem marginal though when you flog the bike in the rough. I am pulling the shock off this weekend... ScaleJockey's gonna work some magic on it. Fresh seals, oil and a rethought valve stack...

  • scalejockey

Posted 02 February 2012 - 06:57 PM

#28

View PostThumpNRed, on 01 February 2012 - 02:23 PM, said:

I dont notice much of a change in steering.It seems steers a bit "quicker" than previously, but that could well be a product of less twist in the forks. I had a bit of headshake at speed previously... has not changed... she'll still make me pucker tight every once in a while when I get going faster than I should in the loose stuff. The forks do make the rear end seem marginal though when you flog the bike in the rough. I am pulling the shock off this weekend... ScaleJockey's gonna work some magic on it. Fresh seals, oil and a rethought valve stack...
And a little pixie dust...

  • ThumpNRed

Posted 02 February 2012 - 07:09 PM

#29

View Postscalejockey, on 02 February 2012 - 06:57 PM, said:

And a little pixie dust...
SAWEEEEEET! I dint know you had any pixie dust left!

  • ThumpNRed

Posted 06 February 2012 - 09:40 PM

#30

Posted Image
Just before the pixie dust was added.

  • XR650LANE

Posted 06 February 2012 - 09:53 PM

#31

I switched my handle to XR650LANE somehow that is supposed to help me get my project done faster I think.

I'd love to know what you end up with for your shim stack in this shock. I did an oil change on mine when I upgraded my spring, but didn't change any other parts. Everything looked great inside, but my bike has relatively low miles 6K, but is a 2001 model.

  • scalejockey

Posted 07 February 2012 - 05:11 AM

#32

View PostXR650LANE, on 06 February 2012 - 09:53 PM, said:

I switched my handle to XR650LANE somehow that is supposed to help me get my project done faster I think.

I'd love to know what you end up with for your shim stack in this shock. I did an oil change on mine when I upgraded my spring, but didn't change any other parts. Everything looked great inside, but my bike has relatively low miles 6K, but is a 2001 model.
First shim stack adjust is a basic three more,slightly thicker, shims on the compression side. With moving the #1(out of the two) crossover shim closer toward the piston.

geeez,someone needs to clean my bench..

  • XR650LANE

Posted 08 February 2012 - 10:13 AM

#33

Does it matter where the shims go on the compression side?

What change does this make on the performance of the shock?

Thanks for sharing,

  • Wing Nut

Posted 08 February 2012 - 10:45 AM

#34

I did a KX450F fork swap on my XRR, and it was very easy. The pin was the same size in the lower tree, and I made up a small shim for the upper. Bolted right up. I did have to trim the fender bolt holes a little though.

Posted Image

Posted Image

  • XR650LANE

Posted 08 February 2012 - 02:22 PM

#35

Your bike looks great Wingnut! What year forks are you those on your Hondasaki?

  • ThumpNRed

Posted 08 February 2012 - 03:38 PM

#36

View PostXR650LANE, on 08 February 2012 - 10:13 AM, said:

Does it matter where the shims go on the compression side?

What change does this make on the performance of the shock?

Thanks for sharing,
Once I get it mounted up and wring the beast out, I'll let you know. Watching a shock tear down and reassembly was worth the price of admission. So many opportunities for a fat fisted neanderthal like your's truly to screw it up! :bonk:

  • ThumpNRed

Posted 08 February 2012 - 03:39 PM

#37

View PostWing Nut, on 08 February 2012 - 10:45 AM, said:

I did a KX450F fork swap on my XRR, and it was very easy. The pin was the same size in the lower tree, and I made up a small shim for the upper. Bolted right up. I did have to trim the fender bolt holes a little though.

Posted Image

Posted Image
Another cross breed! I like it! :bonk:

  • Wing Nut

Posted 08 February 2012 - 06:25 PM

#38

View PostXR650LANE, on 08 February 2012 - 02:22 PM, said:

Your bike looks great Wingnut! What year forks are you those on your Hondasaki?

I bought the entire front end off a 2006 KX450F off craigslist for $400, and sold my stock setup for $300!

  • scalejockey

Posted 08 February 2012 - 08:11 PM

#39

View PostXR650LANE, on 08 February 2012 - 10:13 AM, said:

Does it matter where the shims go on the compression side?

What change does this make on the performance of the shock?

Thanks for sharing,
Not sure what ya mean by "where they go" but..yes the crossover shim (thicknessizelocation)makes a big difference where it goes as well as the size and thinckness of each shim on the stack. It can get a little 'involved"...

  • XR650LANE

Posted 08 February 2012 - 10:57 PM

#40

I meant where in the stack do the modified compression shims end up. I read through Kenzo's post on his XRL shock revalve that he was working on but that project ended before it was completed. I'm interested in upgrading my shock but don't want to screw it up, so it is cool to see what your mods consist of.



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