Ride report, off road modified 2010 YZ125

[Motosportz]

Rode a buddies 2010 YZ125 the other day. Thought I would report.

Bike - Lowered 1.5 inches, rekluse, tank, trial tire

Bike was comfortable and fun to ride. Handles like it is on rails. On par with the husky which surprised me. The lowering helped here I'm sure. SSS KYB forks rule. I am reminded of this everytime I ride a Yamaha. Best forks ever. Devol revalved and shorted this bike and for me it ruled. Owner Scoot liked them but at the end of the day felt a little hammered. Should have asked his weight but think he might our weigh me slightly. Ergonomics were very good, bike felt great. Turns excellent, tracks nice, EZ to ride fast. Rules on down hills.

Motor was pretty much stock. Lacks a lot of bottom end compared to the huskys. Almost to the point where it seems something is wrong with it but it runs good. Mid is OK top rips pretty good just nothing at all down low. He has messed with jetting to try and sort but just not getting anywhere with it. I suggested a different pipe. the soft low end and rekluse conspired to make it kind of hard to make time on hills. You had to want it more than you should have.

Very nice bike, loved many things about it, motor needs more bottom.

 

[454x]

Cool. I wonder how much bottom the Max Power RPM'S kit adds.

 

[Bart]

KYB SSS is fited to Husqvarna, TM, and Kawa! Same fork different name, different shim stack/settings.

 

[Motosportz]

KYB SSS is fited to Husqvarna, TM, and Kawa! Same fork different name, different shim stack/settings.

Yes i think the TC449/250 and TXC 449/511 had them but not much else right?

 

[Bart]

If my memory serves me right all late TC,TXC and CR models.

 

[yzrider]

I do not think kawi ever used them. Atleast they have never referenced using them. They use some fancy sff fork nonsense now or air forks i cant keep up but im 99.99% sure theyve never had sss,.

 

[mkfox]

Kelly, what is that sofa seat on your CR250? I just have to have one of those for my WR. I ride mostly dual sport and spend alot of time in the saddle.

 

[Kyle Tarry]

Yes i think the TC449/250 and TXC 449/511 had them but not much else right?

If my memory serves me right all late TC,TXC and CR models.

The CC (closed chamber) forks in the late model CR and TXC (and probably the TC, no experience with them personally) are VERY similar to the 2006-?? YZ forks. There may be tiny differences here and there, but functionally speaking they are basically the same, to the best of my knowledge.

Some info about them here: http://www.cafehusky.com/threads/yz-cr-fork-swap.35520/page-2

I believe that several OEMs (YZ, Kawi, Husky) have used the same, or very similar, forks under different marketing names. I can't find a good list of who used what when though, they are constantly making little changes to this crap and changing what they call it. Here's some more info:

http://www.thumpertalk.com/topic/754992-kyb-sssaoss/#!IQ8kO

The brandy-new MX stuff is using air forks, which are, of course, completely different.

In any case, I agree with Kelly, those are good forks. You ought to be able to get any of the newer Husky TC stuff to feel similarly good!

 

[Motosportz]

Kelly, what is that sofa seat on your CR250? I just have to have one of those for my WR. I ride mostly dual sport and spend alot of time in the saddle.

Seat Concepts tall. It rules.

 

[mkfox]

Seat Concepts tall. It rules.

Thanks I will contact them. I couldn't find one for an 02 listed on their site.

 

[Rick]

I race pretty much the same bike here in Nor. Cal in Cross Counrty D 36, in the B Super Senior class.
I had RB Design mod my 38mm TMX, divider plate, the whole ball of wax, which help on the bottom. For tight course I run a 50 tooth rear sprocket. Squish mod is another great mod that seems to help was well.
Pretty much the same mods you guys do to the Husky will benifit the YZ as well. I also swap between a Leo Vince sparky and FMF TCII, the Leo is much more responsive than the FMF, more snap off the bottom. I haven't tried a fww yet....

 

[Motosportz]

thanks for the info. Are you running the stock pipe? I told him an aftermarket pipe is probably the best way to more bottom.

 

[Rick]

thanks for the info. Are you running the stock pipe? I told him an aftermarket pipe is probably the best way to more bottom.

Yes, stock pipe....from about everything I've read the OEM pipe is hard to beat with regards to being "good all around". The aftermarket pipes do shift the spread of power more towards mid to topend, better suited for moto than offroad, goat trail work.
The 50 tooth makes 1st gear a "bail out", then 2,3 & 4 are primary gears used. But, I'm not in the PNW and your stomping ground is much different than mine. Last year at the Funky Chicken it was spot on for that venue.
With the RB carb, I am using Ron's suggested needle, which is a 6CHY16-62 out of a RM125. I'm jetted with a 420m 37.5p cut RB slide and adjust air screw as needed. 32:1 with 50/50 pump / race gas. I think I would have a much harder hit from bottom to mid if I dropped the 37.5 down to a 35p. The way I have mine set up it is pretty smooth for being a 125 with a 200 pound old guy at the helm.

If I was going to try a after market pipe it would be http://www.deppipesusa.com/yz125-144-2005-14-tq-steel-pipe/ but for now OEM will have to do, plus the OEM is pretty robust.

 

[Motosportz]

Thanks for the info. I also told him a carb divider plate might help. RB is local to us so that makes it EZ.

 

[Bart]

Kawa calls it KYB AOS (air oil seperate), which is 100% the same as the Yamaha KYB SSS, although the Kawa fork is higher end (Kashima and DLC coatings). Yamaha has way better settings though.

 

[Motovet45]

Has anyone tried to swap the Yamaha SSS forks over to a WR300? I have access to a set off a 2006 YZ 250f and want to upgrade from the OC KYBs.

 

[GMP]

Upper tube/clamp dia is 54mm on the Husky KYBs, and 56mm on the YZF KYBs. Lug offsets are the same so thats good. So, you need a clamp or bore your clamp if there is enough material. Other than that you need a Braking caliper carrier and a Nissin caliper for a 260mm rotor. YZF axel too and custom spacers if you want to retain Husky wheel. You could also look into using the YZF clamps, its easier in some ways, not sure about fitting to a Husky but they will work on a GasGas. I'm doing a Beta / KYB conversion now with a brand new set of '11 YZ250F take off KYB SSS forks.

 

[Darkside]

I'm doing a Beta / KYB conversion now with a brand new set of '11 YZ250F take off KYB SSS forks.

you giving up on the 48 zokes?

 

[GMP]

I love the Zokes, have a lot of trail and shop time with them. Unfortunately the right upper tube of my Beta version was damaged, either by a bad bushing or bad tolerances from the factory. Bushing grabbed the wall of the tube and scored it badly. Bushing had a slight twist to it when removed from the lower tube. I'm also not crazy about how Marzocchi runs a rather tight bushing fit in the land of the lower tubes, all other forks have more float and less problems with wear. I buffed out the scoring and had the tubes recoated T3 but it's too far gone. Internal surfaces are being eaten up. Parts are just ridiculous $$ and not that easy to get. I had to buy a whole comp assy kit for over $100 to get one PFP piston bushing. I don't like that way of doing business. I got a brand new take off set of KYB SSS forks from an '11 YZ250F team bike, for not much more than the price of a Zoke tube and a rebuild kit, if I could get a tube. KYB parts are plentiful and reasonable, they are easy to work on, and knowledge base is huge. I've ridden them and like them. I really do like the PFP adjustment on the Zokes and will miss that. I had this crazy idea to try and fit the Zoke PFP cartridge caps to the KYBs if the threads are the same. Maybe a long winter project.

 

[lankydoug]

I totally agree about the Yamaha forks, they are so close out of the box I don't think I'd re-valve although my 08 yz125 has some really tricked out forks done by the previous owner. An FMF fatty pipe and V-Force reeds really helped the mid on my 08. Going from a stock silencer to a turbincore only made my 08 quieter and USFS legal but added nothing to performance.