03 cr125 rebuild/never ending project.

Edited Date/Time 10/13/2018 10:04am
Hi all, long time lurker, first time poster...

Thought i'd put a few pics of the current steed up, i'm sure it's not to everyone's taste but hey ho..

The story so far.. well, the condensed version is, after being without a bike for around 7yrs, me and a pal decided we needed a new hobby so thought we'd get a couple of cheap bikes and get back into going for a ride every other weekend, nothing serious, anyway, i ended up with a dog.... price was good, but that's about it.....

So, it's been an ongoing rebuild, bit at a time and use it inbetween sort of thing, still not finished, and probably never will be, i've decided i might aswell keep it forever now and have decided i want it looking brand new, the current 'to do' list is as follows,

All new bolts, nuts, axles etc to replace the rusty and rounded stuff,
refresh the calipers and replace the braided hoses as the banjo's have gone rusty,
New airbox and background graphics,
New oem plastic bits to replace the scuffed and discoloured original stuff, sprocket and caliper guard, brake hose clip etc.
Airstryker carb conversion,
Would love some A kit suspension for it, but realistically i'll probably end up with some crf showas, and hopefully that'll be it then.

So to date, this is what i've done,

Replaced all the chassis bearings, swingarm, linkage, shock and headstock,
Had the motor rebuilt, it's now a 134 with messed with crankcases, it's had a new crank assembly and main bearings, gaskets and seals, piston, head, reedblock, clutch hub, clutch kit (fibres/steels/springs), various oem parts like exhaust joint, rubber grommits etc,

Put a set of 06 forks on (preffered the colour)
New plastics, graphics, plastics bolt kit and seat cover,
New wheels, discs, sprockets, bolts, pads and bearings,
New bars and clamps,
New throttle and clutch cables,
New pipe and silencer,
Various tarty bits.
Sanded and polished the bottom end (will also do the barrel when i find a suitable replacement), cleaned up the swingarm with wet and dry, also did the linkage fork after removing the casting marks and gave the frame a clean up, that's about it i think, i'm on the home straight i feel, just need to sort the rusty bolts out and get some background graphics and it'll be presentable.

here's a few pics of it in it's various stages of transformation, i'll update the thread with progress, don't expect anything fast though, i must've owned it for 3yrs now and it's still not done.....

If you got this far, thanks for reading it,
Russ.




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Slosh 112
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Mackay QLD, AU
3/8/2015 6:17pm
Very Nice! came out clean as
3/9/2015 6:36am
Thanks mate, it's not done yet, but it's getting there...

Wish i had took more photo's before to show it's condition when i got it, even the first pictures are after it had a complete bare frame strip down, new bearings and a clean...... It was grizzly, swingarm bearings were solid with rust, the actual sleeve had a crack running it's length (probably the originals), had a job getting them out, thought i was going to ruin the swingarm..... the bike had been ridden into the ground, 5mm square missing from the reeds, knocking rod, cylinder and head ruined etc etc...

I've tried to buy the best bits i can for it, and only brand new for mechanicals, vhm head, vforce reedblock, did ert chain, renthal twinring sprockets etc, i've tried saving money wherever possible though, got the rg3 clamps secondhand, also bagged the carbon talons secondhand and sent them off for stripping, anodising and rebuilding, Dep pipe was off a private seller on ebay who had bought it and never used it, so saved a few quid there also.

Spent hours hand sanding the swingarm, bottom end, engine cases etc to get all the age related wear marks out wherever possible, thing is, the cleaner you make it the more the nasty bits stand out, i've ended up chasing the dirt and crap around the whole bike, i'm down to rusty bolts and fittings now so it's getting there.. i'll have to go through the old photo's of it and see if there's any of it when i first got it.... that'll give you a few nightmares ... :-)













Slosh 112
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3/9/2015 9:30pm Edited Date/Time 3/9/2015 9:33pm
I know how you feel. I just recently helped a friend completely rebuild his 2003 CR125. It was originally a flat track bike and had its forks cut down, its original owner won a Queensland title on it in 2003, it changed through a few hands and my friend ended up with it. Ridden to the ground it soaked up $2,500 in the end but its a sweet ride now.

In my opinion you get just as much satisfaction from finishing a project bike as you do from picking up a new bike from the dealership, I've done both now.

Yours is looking very nice. I love that Ignition cover, you'll get good life out of that Twin-ring sprocket.

The Shop

3/11/2015 8:18am
Thanks man, it's ended up costing so much i'll have to keep it, i'll never get close to getting my money back and i couldn't stomach losing so much selling it, so it's a keeper...

I'm a bit big for it though so hoping to get an 05-07 250 at some point, never been in a position to own/buy a new bike, but agree on the satisfaction from saving it, although, i definitely had a few 'why am i doing this' moments, sanding bits of crusty bike down at 10.30pm in the house.. Haha.

Regarding your friends cr, what did you guys end up doing with the suspension, if you replaced the shock for a crf showa, which bike did it come off, i've read the 04 250f, and 05/06/07 450f shocks are identical in length/stroke, but wondered if there was any fitting issues in regards to the clevis, or canister hitting the frame etc ?

Thanks again mate.
3/11/2015 2:53pm
If you go for 04-up forks, you'll need a different front caliper as the mounting holes changed. 00-03 CR250 showas bolt right up.
3/11/2015 3:41pm
Thanks for the heads up, the bikes an 03 but when i put the 06125 forks on it i had to change the caliper carrier, pretty sure the calipers the same, just the two different types of caliper carrier/mounting bracket, hopefully i'm good.

I'm ok on the fork side of things, i just need some help on which rear crf shock is best/will fit with no issues.
Slosh 112
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3/12/2015 5:29pm
We got a set of twin chambers off an 03 CR250. They slide straight into the triples and the caliber bracket bolts straight up, axle is same also. We didn't touch the shock we just cleaned it up and whacked it back in, although it looks lowered in the back, the shock is stock length and I never got around to measuring the drag link to see if it was standard, it looked standard.

I'd love to get a set of Showa air forks for my RM125. Still a bit pricey tho.
Slosh 112
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9/16/2015 2:03am
Wow! thats show bike standard there haha! how long did that spruce up take? my 450 will get the same treatment this weekend.
9/16/2015 2:32am
Thanks mate, not sure in total, don't want to know if i'm honest... Just been doing bits and bobs as and when over the last few years.

Latest bits are a new barrel and head, i've gone for an off centre 139 convesion, only downside being i now can't use the vhm head, bit of a bummer but oh well, also polished the barrel by hand, took about 20hrs over the space of a week,
Polished the head to frame stays,
Got some refurbed rads,
New rad louves and sprocket guard,
New inet manifold match ported to the v-force,
New kickstart which has been polished,

Hoping to get some custom backgrounds and airbox graphics this week, then it's just replacing all the rusty/chewed bolts, pegs and mounts, etc, probably another couple of years until it's done... Haha.
K-dubbb
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CA
9/17/2015 9:48am
Get a 2015 front plate and fender!
9/17/2015 10:26am
No thanks, i prefer the 04-07 stuff, besides, everyone and their dog are doing it now, this is more exclusive.... lol.
Slosh 112
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9/18/2015 6:18am
No thanks, i prefer the 04-07 stuff, besides, everyone and their dog are doing it now, this is more exclusive.... lol.
Either way it Looks Fresh AF!

I've got new RMZ front end plastics for my RM Whistling haha I think some of the new stuff transfers nicely haha.
Slosh 112
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Mackay QLD, AU
9/18/2015 6:26am
if you have a 139 do ya need the VHM head?
9/18/2015 6:34am
Don't get me wrong mate, i do like the look of the front upgrades on most bikes, i'm just 50/50 with it on honda's, to me, sometimes it looks spot on, then other times i think it looks too sharp and doesn't suit the bike.

I've upgraded the 03 fender to the 04-07 one, and the triple clamps are 22mm offset off an 07crf, so the plate is more round than the cr one, have to agree that the 03 stuff isn't my favorite though, hence the swap over.
9/18/2015 6:45am
Slosh 112 wrote:
if you have a 139 do ya need the VHM head?
No mate, can't use it as the bore is off-centre, the limit is 134cc/56mm on the 03 due to insufficient material on the exhaust bridge, with it off-centre you still have the same amount of 'meat' on the exhaust bridge with a 57mm as you would a 56mm,

The vhm inserts spin freely in the head, as in they're only locked in by the clamping force of the head on the cylinder, i could get an insert made but there would be a problem getting it to sit correctly without having a 'custom custom'insert made with legs, and machining the head.

The heads as new, probably 60mins on it, not a mark on it, has a 134 03 insert and a standard 04 insert, fits 00-04 with the insert to suit.
9/18/2015 7:15am
I'm trying to build a 134 right now. Please message me if you're willing to sell that head.
9/18/2015 7:57am Edited Date/Time 9/18/2015 8:00am
I'm in the uk mate, everything i ever look at seems half the price in America, would it not be more cost effective to source one from your side of the pond ?

They're 200-230gbp over here and inserts are roughly 50gbp, i should get 150 back easy over here in the uk,, i'm all for selling it but you could probably find cheaper closer to home ?

It's not advertised anywhere as i hadn't thought about selling just yet, the bikes not been ran yet so was going to see how that panned out before getting rid, If i ever got another cylinder it would be stock bore and i could put the head back on, could maybe sell just the 56mm insert if you could find a head cheaper, would probably work out better for you ?

Edit, also, if that was what slosh was implying above, i'd have to give him first refusal, fairs fair an all that.
9/18/2015 8:06am
I understand. I've been having trouble finding one here in the states, as most places are only selling the single-spigot 05-07 heads. I'll gladly pay 150gbp+ shipping to get it.
Also, Slosh has dibs. Smile
9/18/2015 8:26am
Ok mate, no problem, we'll see what slosh wants to do, i'll get a few pics and a rough idea on postage costs over the weekend, and go from there i guess ?

If you spot one from the UK and they won't ship it to America, i'm happy for you to get it sent here and i'll post it on, if so, maybe you could do the same, i'm actually after some bits but not in a desperate rush, so if we both did it at the same time for each other it could work out well ?
9/18/2015 8:43am
Ok thanks, i'll drop you an email over the weekend once i've heard from slosh.
9/21/2015 4:31am
Hypercritical update coming soon... 13 style fender and numberboard en-route.. Haha

Couldn't decide on custom backgrounds, so i've just ordered the tld lucas oil neon graphics kit with a full set of black plastics and neon crf front fender, matching 3 stripe seat cover, and matching custom backgrounds... Just done my wad, pretty retarded as the plastics, graphics and cover are new and the bike hasn't been ridden yet, but funk it, it's a b-day present too myself Haha
motoxracer611
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Punxsutawney, PA, USA
9/21/2015 12:09pm
I had an 04 cr125 bought it blown up for $250 rebuilt the top end then rode it everywhere then recently traded it straight up for my 450

9/21/2015 1:21pm
What a bargain, ropey 02's are 1200gbp plus over here... Don't think this will get ridden again now, on the look out for a cr250 to ride.
motoxracer611
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Punxsutawney, PA, USA
9/21/2015 1:26pm
Yea i loved this bike ran amazing and it was my first project by myself I had built many bikes with my dad but only being 16 at the time I felt like I had it I timed myself to do a top end rebuild and it took me 47 minutes to tear it down and be back together for the break in
9/21/2015 1:47pm
Ok thanks, i'll drop you an email over the weekend once i've heard from slosh.
What's the word?
9/21/2015 3:00pm
I've heard nothing from Slosh so it's yours, i'll take a few pics and email them over tomorrow mate.

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