125-200cc Cr125's only, You Wr's beware!

Well this last weekend I pulled out the trusty 06 cr125 weapon for a local track ride, upon arriving at the track another guy also was packin a husky 125 but a Wr, to make a long story short we got to talkin and decided to trade bikes after a couple laps. my 06cr125 for his 09 wr125
in the first 100 yards of the track i immediatly noticed a huge difference. a total wtf moment as I was clutching the bike every straight away, every corner, everywhere! I forced myself to complete a couple laps on it and drove it back to the pits "Gladly". He also came in after a few more laps and pulled up to the truck shaking his head. He and I both could not beleave the power difference. Wtf did they do different between the two engines? they look exactly the same?

Good report, Looks like I'll need the CR Ignition!

I wonder what the difference is in the change of the port design?

06 ports vs 09

i truely expected the wr to pull harder. via heavier flywheel & wr "w"ide "r"atio trans.. this track had long berms and long straights with hills too!.. im going to do some homework on porting changes. we might be onto something here

*bone stock* + race gas vp c12 38:1

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my 06 w/ custom "stock" works pipe
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as stock as it gets for now.. 144 kit goes in, in 27 days.

MY other toy
Classics never die

I have the 08 CR and a friend has the 09 WR and there is a difference for sure in how the bikes pull. My Cr is stock except fot he FMF fatty and PC 2. His Wr is stock with a re-jet. His WR runs very well and I feel his bike is more solid feeling and generally feels tighter. My Cr pulls quicker and harder throughout the rev range and is a lot snappier than his WR.

it could. as far as i could tell his 09 was for the most part stock aside from an fmf pipe, maybe gearing too? lining the bikes side by side they really didn't change much from 06-09 other then frame color and minor plastic changes.

by the way. does anyone know what those brackets are that drop down by the rear fender?

Maybe some are missing the point of why there is a cr and wr. Quick snappy power is great for mx, but on a slippery uphill off camber, I appreciate the soft midrange power of my wr, great for traction. This of course after the lean bog issues were sorted.
I thought of switching to the cr ignition, but I feel it would be a mistake in tight single track.
GP

Is the bog a simple jetting issue? BMP has a2010 on a good special, but if the big is not a simple fix, I'll get something else.

I think some of the bog issue is in the PV settings but also too big a main jet will also cause it to bog.

There is nothing simple about the bog issue with the WR125. The suzuki needle and a "little" pre-load on the linkage spring help, but I don't think anything corrects it completely until you swap out the ignition. I thought I had pretty much remedied the bog with the WR until I tried the CR ignition. Completely different bike. No adjusting the linkage up or screwing endlessly with jetting. It just pulls evenly and hard at all points in the power band. This is with whatever cylinder porting you want to use the pre-08 cylinders or the 08 cr and later cylinders. In any configuration: 125, 144, and 167. It does rev faster and if I was going to run the 125/144, I would add a flywheel weight. The 167 has enough extra spinning weight that it is very tractable. As an aside all the pre-08 cylinders were all the same CR or WR. The 08 CR and all 09 or later share the same cylinder. The newer cylinders have better top end breathing by eliminating one of the transfer port bridges. Other than that they actually have near identical port area and timing. The last actual "wide ratio" tranny put in the WR 125 was in 04, since then they share the same tranny. I bolted in a new stock 09 CR125 motor into my wr and other than the suzuki needle the whole thing is stock plus the fmf fatty and TC2 silencer. Ran and pulled great from the get go with virtually no adjustment up of the linkage.

So the take home point is that if you want to not worry at all about a bog and want the best motor either convert your WR to the CR ignition or wait a year until Husky puts the new digital ignition in all the two strokes.

I have been saying this for years .Both my 2006 and 2008 CRs are stock still have never had to adjust the carb.My CR will lug all day in single track or scream across the desert.
CR lighter flywheel,lighter rear wheel ,non oring chain less drag on the motor .
I once rode a new 2010 Wr 125 then we installed my 2006 CR 125 ing into the Wr and then rerode the bike BIG difference .

With the newer WR it seems to be hit or miss. I had mine basically dialed in an hour. I put a PWK on it before I ever fired it up. I had to do one needle adjustment. I did not have a bog but on really hard pulls it took more clutch then it should have to get on the pipe. I moved the power valve linkage 3/4 up and it was good. From previous owners experiences I had enough information to get the jetting and linkage correct real fast. This is a 144 btw.

But others fiddle for months and still have the bog. I really do not think all the bikes are the same.

That being said I have not heard of a CR with the bog so that ignition might be the ultimate solution. I will be testing one soon and see how it works on really steep and loose hills. I really hope it works good in the nasty stuff becasue I know I am going to like it in the fast and open terrain.

I may pick up a 2nd hand wr 125 once i find one.. how much are the cr ignitions out of curiosity..

ta

I was unfortunate to have one of those bad B word bikes. The simplest fix is the RM needle, 5.0 slide and to delay the powervalve from opening with Walt's spring kit.

Looking back, the flywheel takes quite a bit to spin it (My son's RM would get me out of 1st and 2nd gear but by 3rd + I would pull away)., the powervalve dumped early ( Many articles on Suzuki, KTM and Husky that like the powervalves delayed for performance) and the carb configuration was too lean
(Took my power up needle, stock 4.0 slide and stuck it in the RM 125 and it bogged exactly like the Husky).

This year is going to be different because I am focusing on using the TMXX, RM needle, Walt's stock/silver spring,EG 144 kit and using Walt's recommendations on the CR ignition/ Wossner piston for the EG 144. I will also try the FMF Fatty after stock pipe gets smashed.

Im sure the WR can rock with these mods. Road rego is the reason I had the WR .
I still love the WR125 but I think the engine is too small for the flywheel weight

As Walt has said this causes some of th eissues and even when its running great it still isnt a powerhouse

For a 125 the CR rocks . the newer head is supposed to be much better but there seems to be some newer crs that have jetting or power rvalve issues which can be sorted . These dont seem to be an issue on older head design ...

The guy i bought my TE 250 2010 son raced last season on the TE 250 - won Qld championship
He trialled a fully worked 2010 CR 144 and found it was faster on the motocross track by a long way but much slower on the enduro loop
The CR was a little all or nothing he said - may be a little tricky on hills
I was going to switch to CR ignition and then 144 but sold bike . Fo rme the money is better invested in a newer bike . I think the TE will suit me better but have yet to find out .