Any grown men riding a KX 112 need advice

I would look at lowering links for a 250f if you enjoy that amount of power or if you want less power and a smaller chassis, look at a CRF150R. Especially if you do a bit of trail riding as it will be a bit more comfortable to ride vs. a supermini in that scenario. A 112 is very top end oriented, even with a lightweight rider on it. 

https://www.koubalinks.com/ Make some quality products for lowering a big bike. I see they offer a 1.5" lowering link for your old CRF250R (or a 1.875" lowering link for a '23 Honda CRF250R) and if you paired that with a slim seat foam, I think you could be pretty comfy. Here's a full list of links they sell to see if any of the bikes listed with the lowering link would allow you to plant your foot or feet.

Here's the seat height on a KX112:

The shortest seat height 250f would be this:

A 1.5" lowering link would bring it down to 35.4". A slim seat would bring it down another 0.5" making the overall seat height 34.9" which is pretty close the Supermini seat height but with all the benefits of a big bike (power, wheel span, suspension, etc.)

There was a pretty good rider that was 5' 6" and did all sorts of things to make his bike fit him!

im 16 now on a YZ125, Im 5’9 168ish. When i was around 14-15 i was in that 5’5 area. we got a bigger swing arm and wheels with the 85cc it fit me great at the time. I still have that bike and i ride it around the house doing wheelies and things. It bogs having to pull me so you gotta use the clutch (still 85cc) im surprised it fits me aswell as it does. 

I raced against a guy in 30+B once who was on a KX110. If you don't mind being low on power, it's a good option. 

Go with the stiffest springs you can and then shim them if you need more preload. 

I would go with the 112 if you’ve already ridden it and like the way it feels and have fun on it. I’ve ridden a big wheel 85 (I’m 5’6” 160) and it was a blast. Here’s a few vid of a 125 engine in one, and a KTM 105. Not that you want to spend a lot but just for fun

Sounds like the 112 would be perfect. Someday you may want a 250F. Have you tried a YZ125?

I'm 5'6 and 135 lb. If I can ride a 250f you can too.

I got a Devol lowering link for this yr, it dropped the bike 1.5" and what a world of difference. Try the lowering link first. Other option is ask suspension guy to lower your bike for you but lowering link will be cheaper.

I'm 5'7" and 160lbs. I used to love ripping around on my daughter's KX100. I get where your head is at. That is definitely a fun bike and at my size it's probably the same feel that a 6ft + guy has on a regular bike. 

But my problem would be the Powerband. At my weight I had to shift constantly and feather the life out of the clutch to keep it on the pipe. Now thar was just playing around.  If I was going to hit big jumps or race? I'd be really worried about coming up short a lot or just having to give her everything thing she had to clear the big stuff.  I personally hate that feeling. Plus I think the bike length is so short your going to be very unstable at high speed. 

I can see both sides. But shoot man. Give her a go and give us a review.  We've got a guy locally that races one every now and then. He's always in the back but he might be having the time of his life.

Lowering links aren't for "aggressive riders or jumping". I think it kind of depends on your definition there, but to me I take that as pro level riders or jumping jumps like the pro's. If you are going 10' off the ground might be okay. They recommend the transformer pull rod if you are going to be jumping which is about the same price, but only drops the bike about 1/2".

You'll jump the 250f way better. Just have it set up for you a little better. Tons of short chics even ride 250fs. The martins can't be much bigger than you either. 

Buy a cheap small trail bike for trails n get a new 250f for tracks. 

I’d modify(lower/section) the subframe and shave the seat a little before lowering suspension or use it as a excuse to get new FC250 and husky parts low seat. 

The 112 should have better power : weight than a 125 BTW. 

Sur Ron Ultra Bee electric is what you may want at home. Just need quality tires or light full size wheels and tires. Same size as the super-minis. Keep the 250 for trails.

And why is the 112 not good for trails as well?I'm 5'11" and had a blast trail riding a KX100.

The old smaller crf230 can be upgraded for decent MX. World Vet at Glen Helen had a 60 yo guy beat a lot of 450's and that was with them big hills! Not an Expert rider neither.

I understand where you are coming from. I'm 5' 5" and I have a 2018  FC350. I LOVE the 350, especially on the track. 

However, I too have thought that a KX100/112 would actually fit me better than a full size bike. When my buddies and I are out play riding in the woods and just goofing off I often think to myself that a physically smaller bike would be better.  I have even looked for a big wheel version of an RM85 and CR85 or KX100 just for play ridding. 

 Try to find and older/cheaper KX100 first and try it out. If you like it then resell it and get a 112. That way if you don't like it you are only down $1,500-$2,000 and you could probably get most of your money back out of it. Think of it as a short term rental lol. 

Is here a video of this anywhere? I want to see his setup. 

Not to hijack this but, I’ve been thinking the same. I’m 5’6”, 135lbs, and need something for trails.  I had a CRF150RB, but hated the motor for off-road.  Was thinking about a KX112, but would a used ktm/husky super mini be a better option? The KX is a mostly an older design.  

You beat me to it. Too bad the vitards got here first. Lowering links are not for lowering an MX bike seat height. Their purpose it to effect the handling.

I have had an interest in a TM112 or KTM105 myself...I say go for it. Stuff like this is supposed to fun, your height will be great for this bike. I am sure someone can set the suspension up for you as well. Curious to see where this thread goes.

Try the 112. Get a tall seat. I bet if nothing else you have a lot of fun and surprise a lot of people.

Might be hard to find one, But Service Honda was selling CRF150r' s with fuel injected CRF250R engines put in them. No idea how many they sold .  But that would give you 250F power with a smaller chassis.  I don't know what options there are for  springs for the 150 though, so it might not be  too easy to spring it for You and the extra weight from the 250F engine. No idea of what they would cost if You do find one. When I saw them on Service Honda's website years ago, I thought how it would be a great option for  a lot of people.

I have the opposite problem. Being too tall for everything at 6'9" tall. But I can understand wanting a bike that  is sized so it fits You better.  It has been a long time since I had a dirtbike that fit me well. 

Edited after I noticed I put CRF250F instead of R   They built the 150's with the 250 engines they pulled from the bikes that they put the 500 2 strokes into. 

“KoubaLink gives you choices based on rider height and ability whether you're a racer, weekend fire-road cruiser, or just need a lower seat height without giving up suspension performance.”

I would try cutting down a foam. It's cheap enough.

https://www.motosport.com/product?cc=us&gclid=CjwKCAjwoqGnBhAcEiwAwK-Ok…

Not sure how they are now, but a few years ago I was surprised at how a 125 ktm was relatively small and nimble, it is probably still the case. With a lowering link, a thin seat, clamps put at the max in the fork, low bars, and maybe tall pegs, it may be a nice combo to try. 21/19 wheels couples with adult suspensions are way better and safer, and I am admitting that whereas I am a big fan of superminis. 

https://www.vitalmx.com/forums/Moto-Related,20/Any-vet-guys-ride-minis-…

https://www.vitalmx.com/forums/Moto-Related,20/Spoke-with-my-wallet-mid…

The guy has a series and two yrs at World Vet. Budget garage channel and title video is 60 yo does crf230... something like that

Fun until you realize the smaller wheels get stuck easier on things. Bigger wheels would roll right over. 

Cannon race craft will make any size spring you want whatever rate for like 159$

Beta Xtrainer (35.8" seat height) with a KYB suspension swap (can buy a kit from Beta and/or Boano Beta)

Gets you a low seat height and a 300 2T. 

We considered the KX100 (and CRF150R) for my wife (5' 6"). The ergonomics were never going to work for her, way too cramped.

When my 250F grenaded I got a cr80 big wheel. Loved that bike, wish I never sold it. I am/was 5’5” 145 lbs, relatively “long” legs so can tippy toe my ‘04 yz250 (best smoker and maybe bike ever) I never was a ripper as a kid, so had some unfinished business on minis. 
 

I rode it hard, wrung out every bit of power, and could hang with local A-class racers (sometimes get ahead of) on the turn tracks and trails. However I got a concussion on it by getting too confident on the ramp. The narrow powerband bogged when it should have brapped, so I cased. Then the tiny wheelbase tossed me over the bars when I could have ridden it out on a larger platform. 
 

Tldr: I recommend for most type of riding except for lots of technical jumping.