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 04-21-2013, 09:52 PM   #61
Brtp4 OP
Yea, its a friggin L
 
Brtp4's Avatar
 
Joined: Sep 2006
Location: Bend, OR
Oddometer: 1,930
Version 2.0

XR280R v2.0

Rode the modded little XR quite a bit, and really liked it. It was a really forgiving bike, and the short wheelbase is good in tighter ST. However, being 220 lbs, it was being ridden harder than it's old-tech suspension was intended for. I finally hit my threshold of tolerance when I somehow hacked up my front wheel and crashed in some rocks.



I thought really, really hard about upgrading to something modern, and came within an inch of buying a rare, nice KTM 250 RFS bike. By now I hated the suspension, but I really liked several things about the basic package, mainly the simplicity and the turning. So, I decided to stick with the LRP (meaning dump even more cash into it) and see if I could improve it.

I started to gather parts for a CRF fork swap. I did this on another XR, and afterwards realized that I made a mistake on the triples I chose. The most people use early CRF triples, which have a 24mm offset. Stock XRs are 18mm. Putting the 24s on my other XR made turn in....strange. Forgiving, but also vague, no bite, etc, it actually turned better with the stock forks.

I wanted to avoid that, so I got a set of 20mm clamps from Scotts performance, which are made by Billet Racing Products:



I had a set of 2006 CRF250X forks, but they needed to be shortened to get as close to proper geometry as possible. One of the best CRF suspension shops is Precision Concepts in Riverside, CA. Precision Concepts is owned by Bob Bell, who has a long history with Honda's factory Baja team, and has assisted with suspension development for Honda. Additionally, at some point in the past he actually sponsored a team of XR250R's for the Baja 1000.

Anyway, PC shortened and revalved the forks, with a net increase in static height of 1".




NOTE: To balance the suspension and the height, PC revalved the rear shock, and took out a shim that added 4mm of length to the shock. The shock leverage ratio starts at 4.0:1 which means the ride height is now 16mm higher. 1" = 25mm, so I made up the difference with a taller rear tire.



The fork swap is easy, it's chasing down the details that is the hard part. I had to get a new headlight, which meant adding a handlebar switch, which meant a new lever / comp release combination, new fender, few other things:





Haven't made up my mind on the mirror:



And the final result:









The XR styling is really dated, and it hard to get around. However, the final result looks much better. This was taken this AM, just before a shakedown ride. Results of that next....

BP
__________________
BP

Atomic Moto.com
Bend, OR
Brtp4 is offline   Reply With Quote
Old 04-22-2013, 08:30 PM   #62
Tachedoutoffroad
Mr. Parrish
 
Tachedoutoffroad's Avatar
 
Joined: Jul 2011
Location: Alabama
Oddometer: 601
250/300s rule

__________________
'00 KTM 400EXC --plated!
'89 Honda Transalp
Sikorsky UH-60L
Support your local know-it-all gear guy and give your money to Brian at https://www.atomic-moto.com/
Tachedoutoffroad is offline   Reply With Quote
Old 04-23-2013, 09:26 AM   #63
Johnnyboxer
Studly Adventurer
 
Joined: Oct 2003
Location: Yorkshire, UK
Oddometer: 993
looks great
__________________
So many roads...........So little time..!!!

2005 BMW R1150GS Adv - Black
2005 BMW R1150GS Adv - Silver
2007 BMW G650 XCountry - Black
Johnnyboxer is offline   Reply With Quote
Old 04-23-2013, 09:59 AM   #64
Olas
the darkness
 
Olas's Avatar
 
Joined: Aug 2007
Location: Englewood, CO
Oddometer: 3,847
Why didn't you go with the XR400R fork swap? I did it to mine, great upgrade to the stock XR250R forks and really not much work involved in doing so.
__________________
Rebuild threads:
'92 XT600, '87 XR250R
Lighten up, Francis.
Olas is offline   Reply With Quote
Old 04-23-2013, 10:09 AM   #65
elsalvadorklr
Beastly Adventurer
 
Joined: Nov 2008
Location: el salvador
Oddometer: 4,076
as usual BRT

awesome work man,
elsalvadorklr is offline   Reply With Quote
Old 04-23-2013, 10:42 AM   #66
Brtp4 OP
Yea, its a friggin L
 
Brtp4's Avatar
 
Joined: Sep 2006
Location: Bend, OR
Oddometer: 1,930
Quote:
Originally Posted by Olas View Post
Why didn't you go with the XR400R fork swap? I did it to mine, great upgrade to the stock XR250R forks and really not much work involved in doing so.
The 400 forks are a big improvement, and easier to install. However, the Showa Twin Chamber forks are a much more sophisticated design. If one spends the time to dial them in, they work very, very well.

BP
__________________
BP

Atomic Moto.com
Bend, OR
Brtp4 is offline   Reply With Quote
Old 04-23-2013, 04:54 PM   #67
Baja Ho
Studly Adventurer
 
Baja Ho's Avatar
 
Joined: Jul 2007
Location: Central Coast, CA. USA & Cabo San Lucas, Baja Sur
Oddometer: 730
Brian

Nice report. I have two newer E start bikes but still like my Old school XR 400.
Baja Ho is offline   Reply With Quote
Old 09-19-2013, 08:28 AM   #68
Tachedoutoffroad
Mr. Parrish
 
Tachedoutoffroad's Avatar
 
Joined: Jul 2011
Location: Alabama
Oddometer: 601
Bought a KTM yet??











Idiot.
__________________
'00 KTM 400EXC --plated!
'89 Honda Transalp
Sikorsky UH-60L
Support your local know-it-all gear guy and give your money to Brian at https://www.atomic-moto.com/
Tachedoutoffroad is offline   Reply With Quote
Old 09-19-2013, 08:34 AM   #69
Brtp4 OP
Yea, its a friggin L
 
Brtp4's Avatar
 
Joined: Sep 2006
Location: Bend, OR
Oddometer: 1,930
Quote:
Originally Posted by Tachedoutoffroad View Post
Bought a KTM yet??
No, I prefer dumping money into old Honda's to get them to mediocre levels of performance.

Ahem.


BP
__________________
BP

Atomic Moto.com
Bend, OR
Brtp4 is offline   Reply With Quote
Old 12-08-2013, 01:12 PM   #70
Greenbean393
Rokonbeast393
 
Joined: Dec 2013
Location: Red River Gorge
Oddometer: 1
Wicked

I bought a 96' Xr250R about a month ago. It's in like mint condition all except on how bad it smokes.. its mostly blue smoke like a 2stroke. I changed the oil an still smokes if not worse. My questions really are how do you know what needs replaced? An how do you know it's not already been rebuild. It runs amazing but I wanna catch the problem before it blows
Greenbean393 is offline   Reply With Quote
Old 12-08-2013, 01:52 PM   #71
CPAT
Adventurer
 
CPAT's Avatar
 
Joined: Mar 2013
Location: Southwest Colorado
Oddometer: 48
Quote:
Originally Posted by Greenbean393 View Post
I bought a 96' Xr250R about a month ago. It's in like mint condition all except on how bad it smokes.. its mostly blue smoke like a 2stroke. I changed the oil an still smokes if not worse. My questions really are how do you know what needs replaced? An how do you know it's not already been rebuild. It runs amazing but I wanna catch the problem before it blows
Hey green bean, had the same bike. Other than top end job, mine turned out to be valve stem seals. On tear down, you could find the culprit by looking at which port had the most carbon buildup. I couldn't find a problem with piston/cylinder, so valves were lapped, stem seals replaced and was put back together. Sold it to a fella from moab. That was in March this year and it still is running great. Good luck.
CPAT is offline   Reply With Quote
Old 12-08-2013, 06:40 PM   #72
DD345
XR guy
 
DD345's Avatar
 
Joined: Feb 2012
Location: Marietta GA
Oddometer: 21
Love the thread, I have the same bikes as you. I have had my 1996 XR250R for about 10 years now with a 284 kit with stainless steel valves. And no my bike is not a purple dinosaurs any more. The bike is mostly stock beside handlebars, and a skid plate. And my 1997 XR650L which I have had only for 2 years. Just simple mods like handlebars, skid plate, and desmog. Best bike combo XR250R for the trails, and the XR650L for gravel roads. Don't sell out and get a newer bike.
DD345 is offline   Reply With Quote
Old 12-09-2013, 06:43 PM   #73
CoeGuthrie
92XR600R
 
CoeGuthrie's Avatar
 
Joined: Jun 2009
Location: Castle Rock, CO
Oddometer: 62
Like the XR man! I just got done doing a similar think to my 92 XR600R. These bikes are awesome machines and well worth keeping IMHO. So how do you like the USD's? I haven't been able to put much time in on mine yet.
__________________
-'92 Honda XR600R. Street Legal. 98mm Piston, '07 CRF USDs, TT Vapor, BD Tecate light, Wide pegs, FMF PowerBomb and Q4. Been my ride for 14 years!
CoeGuthrie is offline   Reply With Quote
Old 12-09-2013, 07:06 PM   #74
oldoval
Frank Orator
 
oldoval's Avatar
 
Joined: Sep 2010
Location: Cedar City, UT
Oddometer: 414
Nothing to add, other than I love this build. I had a 2004 that I bought new and really enjoyed. Wish I would have kept it and done something similar.


.
__________________
http://nathanwiley.smugmug.com/
oldoval is online now   Reply With Quote
Old 12-09-2013, 07:47 PM   #75
Brtp4 OP
Yea, its a friggin L
 
Brtp4's Avatar
 
Joined: Sep 2006
Location: Bend, OR
Oddometer: 1,930
The bike is a blast, and the USDs are great. They were set up by Bill Bell at Precision Concepts, and they work much better than the revalved USDs (done by someone else) on my 650L. FYI he told me that years ago, he sponsored a team on XR250Rs for Baja. He know a lot about the bike (and everything about Honda USDs).

I like it too much and have too much invested to trade it for something else. That said, there are a few things that still need improvement.The stock carb floods the bike when it falls over. Planning on changing it for a 34mm Mikuni flat slide. Also, the power delivery is a little too short, and just kinda falls off. I want a longer power spread and a little more up top, so I may try a cam. Finally, with the short WB, the bike needs a steering damper. Or, I just want one. Or both.

It really does work so, so well on ST. Super fun, quick, easy to ride, forgiving, reliable.

BP
__________________
BP

Atomic Moto.com
Bend, OR
Brtp4 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 09:09 PM.


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