ADVrider

Go Back   ADVrider > Bikes > Thumpers
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 08-20-2012, 05:52 AM   #1
ggamster OP
Gnarly Adventurer
 
ggamster's Avatar
 
Joined: Oct 2011
Location: Tunnel Hill, IL
Oddometer: 231
How to Lower a CRF250L for Free!

OK. Over the weekend I decided to attempt lowering of the new 2013 CRF250L. This is my wife's new bike and with an inseam of 27" her feet were about 2" off the ground. I had to do something or she wasn't going to ride it. The stock seat height is 34.75". so I lowered the forks all the way and rechecked finding 34.5" was the new seat height. This wasn't going to cut it so I looked for another way to do it. Then I saw this


As you can see. This is the bottom of the shock and there is ruffly 2.25" between the bottom of the shock and the mounting bolt. This is a greater distance than any other bike I have seen.

All we have to do is move the bolt hole up and you lower the bike. However with that said there is a magic number for this movement. I wanted to maintain the ability to return the bike to stock height therefore I would have to keep the stock mounting location. I also wanted to maintain the same distance from my new bolt hole to the edge of the next hole. so there was enough "meat" left on the shock so there wasn't a bending or tearing issue. That magic number was determined after some careful measuring and will be reviled latter.

Lets start the breakdown.
First put the bike up on a stand so the rear wheel is off of the ground.
Next put a strap on the rear wheel over the fender so that the strap is snug enough to hold the weight of the rear assembly.


Next remove the seat. Do this by removing the two long allen bolts on the back of the seat.

Now remove the side panels. There is one allen per side. This will give you access to the rear shock upper mount bolt. To access it you will have to take the rear brake fluid reservoir. Don't turn it over just take it loose and push it lower under the mount.


In this picture you see the reservoir and the upper shock mount.
Next disconnect the lower wish bone linkage.

Now disconnect the lower shock mount seen in this picture.

Now using the strap over the rear fender and connected to the rear wheel raise the rear wheel about five inches. Next remove this upper rear shock mount bolt.

When you take this loose you will have to have an open ended box wrench on the nut. Put some grease on the surface of the wrench. This will capture the lock nut and washer. Do this for install as well.
When this bolt is removed the rear shock can be dropped out the bottom.
Now for the easy part. The Magic Number 1-7/16" You need to center your hole on this measurement taken from the bottom of the shock.
Now drill this hole to match the existing hole size. Be sure you file off all burrs.
When done you should have this.
Now you you can reassemble in reverse order. Be sure you use blue Locktight where used from the factory. Which are the side panel bolts.
The result of your labor will be the following
You get the tire raised three inches and still maintains 8.25" tire to fender clearance so you will not bottom the tire out on the fender at full compression.

Whit this mod along with lowering the forks the static seat height is now 32.75" This is still a bit much for my wife with the 27" inseam. She can kind of get the balls of her feet on the ground. But it will have to work. I will be switching out the springs for lighter ones once they are available.
Next you will have to lower your kickstand. I took 1.5" off of mine. I would recommend 1.75" however. It just don't the the BMW lean I have become accustom to. This is also a good time to enlarge the foot as well.
Now just give it some paint.
The finished product of your labors.

ggamster screwed with this post 08-20-2012 at 01:01 PM
ggamster is offline   Reply With Quote
Old 08-20-2012, 06:01 AM   #2
gvthnks
Studly Adventurer
 
gvthnks's Avatar
 
Joined: Nov 2008
Location: Actionville NC
Oddometer: 527
Nice. And way to lean into cutting up a brand new bike. I like it.
__________________
09 Kawi KLR 650
05 Road Kind Custom
01 Suzuki DRZ-250
96 Honda Shadow
93 Honda XR 80
87 Honda XR250r
83 Honda XR350r
73 Honda XL350
73 CB750
73 Yamaha DT-1

wife calls it a sickness. I'm running a M/C rescue
gvthnks is offline   Reply With Quote
Old 08-20-2012, 07:04 AM   #3
howardbell
Gnarly Adventurer
 
howardbell's Avatar
 
Joined: Jan 2010
Location: Bend, OR
Oddometer: 142
very nice write up, thanks for taking the time to put this together.

however, my question to you is about the converse to this issue... if I wanted to raise up the bike an inch or so, would it be as simple as having my welder fab me up a new u-shape bracket that was an inch longer? Haven't pulled the trigger yet on the CRFL, but I'm close -

thanks
howardbell is offline   Reply With Quote
Old 08-20-2012, 08:05 AM   #4
ggamster OP
Gnarly Adventurer
 
ggamster's Avatar
 
Joined: Oct 2011
Location: Tunnel Hill, IL
Oddometer: 231
Quote:
Originally Posted by howardbell View Post
very nice write up, thanks for taking the time to put this together.

however, my question to you is about the converse to this issue... if I wanted to raise up the bike an inch or so, would it be as simple as having my welder fab me up a new u-shape bracket that was an inch longer? Haven't pulled the trigger yet on the CRFL, but I'm close -

thanks
yes, but...but... You would need to raise the front end as well and you can't well, not without some extensive machining. Also your angle on the drive train would be extreme. I would never do that. It would be a very bad idea. I could be done but the hurtles to over come would be extensive. Might I suggest getting the WR. It has a seat height fo about 37" actual. There is also the KLX If you want something at about 35.5" actual. I have both the WR and the CRF. If you are tall the CRF just feels way too cramped. IMHO. I can't ride it far until I'm wanting off.

One more thing...If you were to add an inch at the shock you would have close to a four inch raise of the rear tire. For example, my bolt hole was moved up the bracket by say...3/4" which moved the rear wheel closer to the rear fender 3.15" so keep that in mind.

ggamster screwed with this post 08-20-2012 at 08:15 AM
ggamster is offline   Reply With Quote
Old 08-20-2012, 08:20 AM   #5
Navin
Unwounding
 
Navin's Avatar
 
Joined: Sep 2009
Oddometer: 6,389
So what was your after race sag #? IIRC it was only 1" before?
Navin is online now   Reply With Quote
Old 08-20-2012, 08:29 AM   #6
howardbell
Gnarly Adventurer
 
howardbell's Avatar
 
Joined: Jan 2010
Location: Bend, OR
Oddometer: 142
Quote:
Originally Posted by ggamster View Post
yes, but...but... You would need to raise the front end as well and you can't well, not without some extensive machining. Also your angle on the drive train would be extreme. I would never do that. It would be a very bad idea. I could be done but the hurtles to over come would be extensive. Might I suggest getting the WR. It has a seat height fo about 37" actual. There is also the KLX If you want something at about 35.5" actual. I have both the WR and the CRF. If you are tall the CRF just feels way too cramped. IMHO. I can't ride it far until I'm wanting off.

One more thing...If you were to add an inch at the shock you would have close to a four inch raise of the rear tire. For example, my bolt hole was moved up the bracket by say...3/4" which moved the rear wheel closer to the rear fender 3.15" so keep that in mind.

Thanks for the thoughtful response -

At 5'10" and a 32" inseam, I feel I am right in between the 2 bikes, with the WRR being a little too tall and the CRF being just little short... and if I had to be totally honest, I'd have to admit that the only real reason for wanting to raise up the CRFL a little is purely superfluous -- just to get a little more aggressive looking woods bike -- the older I get, the slower i go, in other words, "more show, less go"

thanks again
howardbell is offline   Reply With Quote
Old 08-20-2012, 11:11 AM   #7
ggamster OP
Gnarly Adventurer
 
ggamster's Avatar
 
Joined: Oct 2011
Location: Tunnel Hill, IL
Oddometer: 231
Quote:
Originally Posted by howardbell View Post
Thanks for the thoughtful response -

At 5'10" and a 32" inseam, I feel I am right in between the 2 bikes, with the WRR being a little too tall and the CRF being just little short... and if I had to be totally honest, I'd have to admit that the only real reason for wanting to raise up the CRFL a little is purely superfluous -- just to get a little more aggressive looking woods bike -- the older I get, the slower i go, in other words, "more show, less go"

thanks again
The WR has some adjustment in the rear shock. You should be able to ride it stock with the suspension in it's lowest point. I would do that and ride it.
ggamster is offline   Reply With Quote
Old 08-20-2012, 12:03 PM   #8
Navin
Unwounding
 
Navin's Avatar
 
Joined: Sep 2009
Oddometer: 6,389
This bike has a threaded preload collar set up, right???
Navin is online now   Reply With Quote
Old 08-20-2012, 12:07 PM   #9
ggamster OP
Gnarly Adventurer
 
ggamster's Avatar
 
Joined: Oct 2011
Location: Tunnel Hill, IL
Oddometer: 231
Quote:
Originally Posted by Navin View Post
This bike has a threaded preload collar set up, right???
Yes it does. However it is all the way backed off from the factory. No reducing the preload. Only increasing. I don't know what weight they want the bike to be set up for but with 190lbs on it I only get about 10% sag and none in the front.
ggamster is offline   Reply With Quote
Old 08-20-2012, 12:41 PM   #10
Navin
Unwounding
 
Navin's Avatar
 
Joined: Sep 2009
Oddometer: 6,389
I thought (feared!) it might have one of those old 5 step ramp adjusters or nothing at all. Maybe oversprung to carry 2 up? Weird but who knows?
Navin is online now   Reply With Quote
Old 08-20-2012, 12:53 PM   #11
ggamster OP
Gnarly Adventurer
 
ggamster's Avatar
 
Joined: Oct 2011
Location: Tunnel Hill, IL
Oddometer: 231
Quote:
Originally Posted by Navin View Post
I thought (feared!) it might have one of those old 5 step ramp adjusters or nothing at all. Maybe oversprung to carry 2 up? Weird but who knows?
I did something fun/dumb this weekend. I did a single track ride with my 8 year old two up on this bike. It was scary as it could be. I don't think we got out of second. Which is about 40mph....Not as bad as I thought. I wouldn't recommend this however. With the back end that low the steering was all over the place.


You can see. This is how it come but look. There is very little adjustment that can be made in ether direction.
ggamster is offline   Reply With Quote
Old 08-20-2012, 01:05 PM   #12
Navin
Unwounding
 
Navin's Avatar
 
Joined: Sep 2009
Oddometer: 6,389
So you'd need a spring compressor or the old hose clamp trick to even get the spring off I guess? Non rebuildable too from what I see?
Navin is online now   Reply With Quote
Old 08-20-2012, 01:08 PM   #13
ggamster OP
Gnarly Adventurer
 
ggamster's Avatar
 
Joined: Oct 2011
Location: Tunnel Hill, IL
Oddometer: 231
Quote:
Originally Posted by Navin View Post
So you'd need a spring compressor or the old hose clamp trick to even get the spring off I guess? Non rebuildable too from what I see?
Correct with that little adjustment I would suspect you would need to compress the spring for removal but it can be removed. On the other hand. I can't see how to take the shock apart for a rebuild.
ggamster is offline   Reply With Quote
Old 08-21-2012, 05:30 AM   #14
gregitt
Adventurer
 
gregitt's Avatar
 
Joined: Aug 2012
Location: Loei, Thailand
Oddometer: 14
how to lower....question

How to Lower a CRF250L for Free!

Great post...hope I am replying in the correct mode.

If you are riding the lowered bike solo, how do you feel it affects the overall handling????

thanks much
gregitt is offline   Reply With Quote
Old 08-21-2012, 05:42 AM   #15
ggamster OP
Gnarly Adventurer
 
ggamster's Avatar
 
Joined: Oct 2011
Location: Tunnel Hill, IL
Oddometer: 231
Quote:
Originally Posted by gregitt View Post
How to Lower a CRF250L for Free!

Great post...hope I am replying in the correct mode.

If you are riding the lowered bike solo, how do you feel it affects the overall handling????

thanks much
There are no noticable negative effects. It feels just the same. If I were real picky I think the suspension may work a bit better on the small coppy stuff lowered due to the angle of the rear swing arm. It rides great.
ggamster is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 08:16 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014