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Any bike will be pretty good if you want throw 3 grand at it I guess.
Take a KX112 and spend half that at Pro Circuit and the thing will rip your arms out.
Wasn’t aware you were going down that road….
Awesome
Even without that work you’d be fine but I’d be really keen to hear how that Works out !
Ripping my sons arms off isn’t what I want, no rider wants that they want rideability,
fuel burn and the flow and mechanics behind that is what generates rideability, in order to get the fuel to burn the best, you need to do all the mods I listed, maybe even more…
it’s not rocket science… it’s just simple science.
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Obviously it depends on the condition of bike we get, but I would assume that every 150r that is low hour farm boy ridden has sucked dirt into the engine, and the valve seats are trashed….
Leave it stock and it will still smoke a built 150 and cost you one helluva lot less to rebuild when the time comes. Plenty rideable in stock form, too. Sounds like you’ve got deep pockets and have your mind made up, though, so good luck in 2024.
My son had one. He liked it. Tokyo mods carb kit is all that’s needed. Thing never gave us one problem. Great bike. He’s moved up to 250 now and was easy transition.
Can't fix the weight. They are pigs. 185 lbs wet. You are putting lipstick on it is all. KX112 is 170 wet. No brainer.
My son raced one with only FC suspension oh and a billet carb piece (fix for common breakage). It isn't fast but honestly it wasn't much of a handicap either. We had a PC TC85 for real racing, but we would ride the Honda at local tracks and races and do really well. My kid always liked his bikes with usable bottom end power, so he loved the 4 stroke powerplant. If you aren't going to Lorettas, Freestone, Mini O's (top tier amateur races) I think you will be fine. Might get worked on high speed tracks though.
My son races the 150r in both 85cc and supermini up here in Canada. Regional racer absolutely loves them. The rider is all the difference on the smaller bikes at the regional level. He consistently podiums in both classes only mods are 45 pilot, 145 main, (sea level max altitude is 1000ft) tall seat, 816 Renthal adult bars. He has 2, one set up for small wheel one, one set up big wheel. He is only 3 years into motocross and is starting to put a push on some riders that are racing Loretta's qualifiers. Keep the filters clean and change the oil lots. Both our bikes were bought used 2015 models, one has 250+ hours the other one just over 160 hours. Adjust valves every 30 hours, intake valves especially right intake valve on both bikes gets tight. (one had 100 hours when we bought it, the other had 27)
His best moto bud Asher Brown, qualified for Loretta's this year at Washugal in 250 B and Schoolboy, finished 1 in 450 Bmod and 450 Bstock (before he was D'Q'd He's only 14, in Canada we let the boys rip on 450's) he puts some hot laps in on the 150's and says they rip over the 85's. Take all this for what it is but I own two 150r's and that's our first hand experience. Oh I do the piston, rings, wrist pin, timing chain every 100 hours, and they still look like new.
Give Bundy a call at Bundy Built Motorsports in Mooresville NC. I think he built Coopers JGR CRF150 Supermini.
I went the 150 route for my son. Similar reasons, he prefers a fourstroke. Will it run with superminis? Nope. So, if racing is your number one goal I'd say look elsewhere. It did however give him a great platform to work on technique without having to be perfect with the power modulation of a two stroke. I put different bar mount adapters on that raised the bars up and forward. I wasn't a huge fan of the design but they never came loose and served their purpose well. I also used Guts Racing tall seat foam and shaved it slightly so it transitioned more like a modern bike. Lastly, I got the Raptor pegs that are -5mm down and back. This opened up the rider triangle a lot. My son Is just now bit by the racing bug now that he is full time on a 250 but the 150 was fun for him and his technique has transitioned well on to the bigger bike. Be sure to keep a small supply of AllBalls accelerator pump kits on hand to keep it running crisp. The moment jetting feels off, check that and swap new. They gum up quick with that old fcr carb design.
Sorry, I can't seem to post multiple pics. Here's the difference with those chassis changes from stock.
That's a noticeable difference for sure, must change the feel quite a bit.
I've always been a fan of those little honda's, shame yamaha got theirs to the testing stage but not any further.
From a dad who spent a fortune on 150’s. The power is in the head, camshaft, and a programmed Vortex. The late Ron Hamp did our race heads and actually taught me the epoxy process that made the heads really make power, but all that being said, it still can’t be competitive against a new 2 stroke Ktm based supermini. If Arenacross is his thing, a Crf150r Big Wheel with everything done is the machine, virtually untouchable on the start with instant hit to get over everything. 30 plus hp is easily achievable, but the maintenance required is brutal.

Typical start against 85/Superminis
Ron Hamp could make a Briggs and Stratton run well.
I had an engine package from him quite a few years back on a 2004 CRF450. Head work, his camshaft, valves, springs, 13.5:1 piston, Yosh header, Supertrapp XR750 can, carb tuned to run U4. 56hp. That was a bunch back then.
It was a beast.
Anyway...
Pit Row
moving those footpegs down and back was my biggest complaint, otherwise it's raceable!
Always been a goal of mine to get one of these and set it up for an adult. I’m 6’1 but pretty light and I always thought these things would be a hoot with a little more juice and some stiffer springs and valving for an adult.
How did you and your son’s build come out Austin?
Great for riding, no good for racing. The Japanese and Austrians
will mop that bike up at all times even if you spend 4 grand on the engine.
It's why nobody ever bought them and they haven't been changed since the inception . Great bike for Girls
whats his name?
I don’t think that picture is a good example to showcase the power of a Honda 150.
That looks like the most local of local races ever, beginner class at best. A fast kid on a cobra 50 would pull the holeshot over all those kids lol
Most likely you will be the only one on the starting line with one of those pigs. Find a good Austrian bike and skip all that mess. Waste of time and money.
he should probably post a pic of his kid doing a huge whip, looking back at the camera, wearing a tank top
I’ve always wanted a big wheel version. Fun and reliable from what I’ve seen.
Dylan Porter #323 Like I say great platform for regional racing check out the results google VIMX race results supermini and 85cc 12-16 He's at the top of the series after 5 of ten events racing against the KTM's, Gas Gas, in my opinion technology plays a lesser part than rider skill and he has a giant smile on his face the whole time, that's the most important part
Asher Brown #517 is the young Canadian (14) who is headed to Loretta's check out the regional results from Washougal a few weeks ago.
My two Boys
A kid named Dylan...
On a Honda...
Winning...
In Canada?
Nah!
I see a bright future. I hope he's met Dylan Wright. We need a picture of The Two Winning Dylans.
Any advice on who to reach out to for head work, have one head that needs to be re worked, at minimum shim, suspect new seats needed and while I’m in there would like to explore a 10%~15% gain in hp. Is the vertex cdi worth it? How do you program it or is it plug and play choose your setting. All this on the 150r Thabks for any advice.
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