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Old 04-10-2008, 12:14 PM   #1
dirtybug OP
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The dr125 thread ???

New to the board here, Lovin it already.
I see some other DR threads , 200, 350 etc.. Are there enough of us Lil' guys around for a 125 thread? I currently have a DR125se and after hours of searching I've discovered there is absolutely no info available, Even the service manuals are hard to find and seem to run about $60 when available. My thought is if there are enough of us here we could compile a thread full of info from first hand experience and knowledge. I'm new to the dr125se an dont yet have much useful info other than try to keep the wind at your back!
Some of the info I'd like to hear about is, parts availablity and interchangability with other bikes, engine mods, other engines that fit the frame, gearing, accesories etc. I've heard that the 125 motor is the same as a 200, is that true? What would it take to bore to 200?
I will be welding up a rear cargo rack soon since I cant find one I like and will post photos of finished product if theres interest. My rack will include removeable side boxes that can be swapped out for a rifle case carrier
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Old 04-10-2008, 01:30 PM   #2
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Hi dirtybug, drzmike1 from Thumpertalk here

I alreeady tried here and didn't get much either
http://www.advrider.com/forums/showthread.php?t=284219

Found a little more
http://www.advrider.com/forums/showthread.php?t=250110

I've pretty much been posting in the DR200 thread. The engines are almost the same, but the rest of the bike is *exactly* the same as far as I can tell. So any racks, etc will fit the 200 and the 125.

Might want to check out the "Minimalist Touring" thread too
http://www.advrider.com/forums/showthread.php?t=201349
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Old 04-10-2008, 03:30 PM   #3
BitBucket
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Welcom Dirtybug,

I too own a dr125se, and agree that the chassis on these are almost identical to the dr200.

I also own a 2003 drz125 and have swapped front sprockets between bikes. I would suspect that their engines are almost identical. I have considered some of the performance upgrades available for drz125 but, haven't been motivated enough to spend the money.

http://www.procycle.us/bikepages/drz125.htm

When I order clutch levers and such I always just order the dr200 parts and they have always worked.
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Old 04-10-2008, 04:56 PM   #4
dirtybug OP
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Thanks for the additional info.

Is anyone able to confirm that the 125 motor is a 200 with a sleeve? If it is would I be wrong to assume putting in a 200cc piston and rejetting the carb would be all thats needed to upgrade?
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Old 04-10-2008, 06:15 PM   #5
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I'm not sure it's going to be cost effective to mod this bike that much (IMO). That said, I would ask Jesse at Kientech. I asked him about mods and this is what he said (the engines he mentions are ATV units):

Hi Mike, it is a sleeper if you can find a ALT or LT 185 cylinder and
head
it will bolt right on. It is the same stroke just bigger bore then run
the
200 jetting because you have the same carb and muffler just leaner
jetting.
Jesse

http://www.kientech.com/

-----Original Message-----
From: Mike [mailto : tbirdsp@yahoo.com]
Sent: Monday, November 12, 2007 9:43 PM
To: jesse@rvi.net
Subject: DR125SE Info?

Hi Jesse,
I just picked up a '94 DR125SE. Can't find much info
at all about the bike. Is it most similar to a
DR200SE? Do you have any jetting infomation?
Thanks,
Mike S
Papillion, NE
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Old 04-10-2008, 06:40 PM   #6
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Yep, almost the same as a DR200. DR200 chassis parts (racks etc) should fit without any trouble.

I don't know any jetting info on that specific bike, but every bike really needs to be tuned for its specific peculiarities and your specific conditions so your not really at a disadvantage there, just dial it in like you would any other bike. Chances are its a bit too lean in stock form.

good luck!
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Old 04-10-2008, 07:49 PM   #7
dirtybug OP
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Quote:
Originally Posted by tbirdsp
I'm not sure it's going to be cost effective to mod this bike that much (IMO). That said, I would ask Jesse at Kientech. I asked him about mods and this is what he said (the engines he mentions are ATV units):

Hi Mike, it is a sleeper if you can find a ALT or LT 185 cylinder and
head
it will bolt right on. It is the same stroke just bigger bore then run
the
200 jetting because you have the same carb and muffler just leaner
jetting.
Jesse

http://www.kientech.com/
I can see your point about the cost efectiveness, This bike is new to me and I'm just trying to get an idea of what my options are for the future. So far I'm happy with it and it moves at a comfy speed for my needs, I would like a bit more power for going up hills with impatient drivers behind but they'll just have to deal with it. I'll proably leave well enough alone for now and keep my eye out for a 200 or the motor from one.
I have seen a few racks for the 200 but none are to my liking plus fabricating one is twice the fun, I'm planning a 13"x13" rack with detachable ammo cans on either side for tools and small bits etc.. Nothing too fancy just functional. I will need to replace/relocate the rear signals and am looking into my options.

Being that this is my first dualsport I have to ask> Does the front end dive alot when braking moderately on this model or is it just mine? it doesn't bottom out but does seem rather excessive.
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Old 04-10-2008, 08:59 PM   #8
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Quote:
Originally Posted by dirtybug
Does the front end dive alot when braking moderately on this model or is it just mine? it doesn't bottom out but does seem rather excessive.
The fork springs are horribly soft IMHO. I've e-mailed RaceTech and BBR (BBR does some DRZ-125 stuff) and gotten no reply. I should just call on the phone so I'm harder to ignore
I'm also kinda surprised that it seems no one has upgraded the fork springs on a 200 either.
I keep meaning to experiment with some springs I have around (stock KLR 650 and some Progressives from a Ninja 250) but I haven't gotten around to it yet.
Upping the fork oil level some would probably help, but stiffer springs are needed for our weight.
The stock suspension on any Japanese bike always seems to be set up for a 120-lb rider.
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Old 04-10-2008, 09:07 PM   #9
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Quote:
Originally Posted by BikePilot
I don't know any jetting info on that specific bike, but every bike really needs to be tuned for its specific peculiarities and your specific conditions so your not really at a disadvantage there, just dial it in like you would any other bike. Chances are its a bit too lean in stock form.

good luck!
Yeah, I went up one size on the main, shimmed the needle up 2 washers, opened up the idle mix. It's better, but I think it needs a bigger pilot jet.
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Old 04-10-2008, 11:44 PM   #10
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I have a little experience modding that motor, so if theres anything I can help with, please just ask.
If you are looking for a good DR/DR-Z125 resource, or parts supplier, the guys at procycle are great.
A 143 bigbore kit is not expensive, but the first thing you need to do is get rid of the cam in that thing.
Some info here...

http://www.thumpertalk.com/forum/sho...d.php?t=435764
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Old 04-20-2008, 09:05 AM   #11
simongandolfi
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125 - Mexico to Tierra del Fuego and north to NY

Small is beautiful - and small is cheap! I ride a 125 Honda Cargo manufactured in Manaus, Brazil. Aged 75, my legs won't support a big bike. The little Honda took me to Tierra del Fuego and bacfk up north to NY wifthout a single mechanical problem. I replaced the cfhain twice and need a thifrd now and I replacfed the sprokets twice - they need renewing now. And I'm on my third front tifre and fourth rear tire. You can read the trip at my BLOG at www.simongandolfi.com
The bike isn't fast. However we got to 4,700 metrs in altitude in Bolivia without difficulty, Necdft big trip, I am going to buy a custom seat!
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Old 05-01-2008, 09:15 AM   #12
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Bluhduh DR125 vs Leg

Took the little DR to the local OHV park yesterday. Hooked up with a guy on a YZ250. Here's what happens when you try to keep up with a YZ250
It was just a mild low side, front wheel washed out. I think the inside of my leg got jammed into where the tank/seat pan/side cover meet though. Just a bad bruise, knee is fine.
DR is great when ridden at a sensible pace
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Old 09-23-2008, 12:35 PM   #13
tdrrally
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picking up a dr125se next week
in inforamation would be great

edward
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Old 09-23-2008, 04:31 PM   #14
Sam Simons
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Dr125

Hi Guys,
I've got one me self....a blue '07 w/ BBR springs and pipe. I'd love to
bump up the HP with a 185 topend(didn't know that would work..).
It's for sale presently,but,if I could significantly increase the performance,
I'd convert it to dual sport and keep it....They're a neat little bike....

Sam in IN

XR400
KX500 Streeter
RE500 Scrambler

Sam Simons screwed with this post 11-27-2008 at 07:01 AM
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Old 09-23-2008, 04:35 PM   #15
tbirdsp
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Quote:
Originally Posted by Sam Simons
Hi Guys,
I've got one me self....a blue '07 w/ BBR springs and pipe. I'd love to
bump up the HP with a 185 topend(didn't know that would work..).
It's for sale presently,but,if I could significantly increase the performance,
I'd convert it to dual sport and keep it....They're a neat little bike....

Sam in IN

XR400
KX500 Streeter
RE500 Scrambler
That's actually a DR-Z125. He is talking about a DR125SE, imported to the USA '94-'96. Engine is very simlar, but I think the chassis is most like a DR200SE.
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