O.S. Max 21XZ-B Nitro Engine
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- Опубліковано 10 лип 2021
- We are pleased to introduce the MAX-21XZ-B Ver. II for drivers who demand performance close to that of our flagship model, the O.S. SPEED 21XZ-B spec. II but at a more affordable price. Many top drivers around the world choose O.S., relying on the renowned linear acceleration to get the best power at the right time. We developed the MAX-21XZ-B Ver. II based on the O.S. SPEED 21XZ-B Spec. II but adopted a single-needle carburetor for easier adjustment. We use the same piston/liner and connecting rod from the flagship model, the O.S. SPEED version, in the new MAX-21XZ-B Ver. II. The crankshaft has the Tungsten counter weights similar to the O.S. SPEED, but without the ultimate DLC coating, offering superb value for money.
The newly developed 22B2 carburetor, which determines the high R.P.M. characteristics of MAX-21XZ-B Ver. II, gives first priority to ease of use. A 7mm diameter carburetor reducer is included as a standard accessory. The low, centre of gravity outer head is anodized in the traditional O.S. blue color.
This latest engine in the O.S. off-road range is the next step in O.S. market leadership by offering improved performance and technology at the right price.
SPECIFICATIONS
Displacement： 3.49cc 0.213cu.in
Bore: 16.27mm/ 0.641in.
Stroke: 16.8mm/ 0.661in.
Practical RPM: 4,000~42,000r.p.m.
Power Output: 2.65ps/33,000rpm /2.61hp/33,000rpm.
Weight: 355g/ 12.52oz.
#speed, #racing, #performance
Some from what I’ve seen, this engine is OS’s updated, longstroke version of the v-spec. The v-spec (both speed and max models) is a short-stroke engine and makes really really good power for the time period it was released in. This engine is the “max” version of the updated v-spec and the speed spec ll is the fancy version with the dlc crank and ceramic bearings. From my experience, the OS engines don’t lose their pinch quickly or if you get them too hot. They do break in very quick though, both of my Flashpoint FP02 (probably the best budget engine/pipe combo you can get. $380 for an OS based engine and pipe and the engine has a ceramic rear bearing and dlc coated crank) had gotten rid of their mechanical pinch in less than a gallon and the initial break in was 8 tanks for both. Both engines have good compression and hold a very stable idle even after 30-45 minutes of running. It seems like OS has designed their piston and sleeves to have a perfect seal for really good compression but not have the pinch of the sleeve be so tight that it unnecessarily stresses the connecting rod. As for the non coated crank, I haven’t had any experience with OS’s newer steel cranks so I can’t give much info on that. If you’re looking for a strong budget engine, the Flashpoint FP02 is literally the best thing you can buy. You get and OS speed spec ll with an OS pipe and header for $380
You the man ,no bull 💩,,no drama ,just good info/fun,
Always!!!
Mann we miss yo videos can’t b leaving us hanging like this
Thanks don’t worry I’m not going anywhere
This is the motor I used to run when I ran nitro. Very very good motor, it kept up with all of the samurai and top of the the line O.S. Motors. Unfortunately didnt have the money for nitro so went electric
Thanks for posting a new video! I appreciate all your tips and experience you share. I got back into RC in 2020 and you inspired me to get into racing here at my local track. Track Life Rules!
My man, glad to hear that
great vid as always bro hope all is well with ya
Just ran this engine this weekend and I when 8 min just after breakend never pitting during 8 min qualifying great engine no need for anything else I have a speeds, novarossi and others but this simple engine is enough for club races and maybe big races but v specs.. have all squad aways been good little engine
Good to see you back
Great tips as always bruh 💯💪🏾
Rajaa what up man good seeing you again has been a bit but wish you the best and Carry on with living out your best life ok see ya man
Thanks brotha you too
No problem man I just wish you the best 👍🏽
Cool! I just bought a 2103R combo for an 8x. It’s my first os. Super nice
Great info brotha always👍
My man! I plan on making it to the B main at my next race with that engine!
You getting there playa
Dope bruha, keep doing your thing
Great tips about os engines
Tell him better off getting flashpoint fp02. Comes with better bearings and dlc crank. Fp02 might have more crank timing to but not sure.
Good engine. You can use other carb venture. It runs awsome
Best videos! No Drama, just good fun R/C
Very cool video will be cool if u do more os motors in the future
I will try my best
I built one Rajjaa111 a while back. It was not a version 2 it was the first one but I used version 2 parts
coming to the BIG 🍎
Yes sir, I’ll be there
Hi, what is the best engine that you recomend now? Durability/performance?
Thanks!!!
I have the same engine.. do you have to use the ventury? Obviously for fuel economy you would want to have it in but I was curious if I took it out would I get more power? I dunno what do you think?
Best budget engine on the market
Fp02 is basically same price, same piston sleeve but has ceramic bearings and dlc crank.
Fp02 better deal
Are you gonna be at Summer Sizzler? Good info brother!
Yes sir, I’ll be there
Similar OS engine that can be used in Tmaxx or Revo
🏁I have an os engine with a cz mark on it but I cant find any info on line. Any info would be greatly appreciated.
Raja my son just started racing we bought a my laps transponder and paid like a 120 bucks for it need one for his truggy noticed that my laps has a three wire one for like 80 bucks the first one we bought has two wires for 120 is it ok to get the 80 dollar one? I just spent like a grand the past two weeks for canopy/ generator/ air compressor chairs /table whole race set up not trailer yet like you big pimping but want to save a few bucks if can
Ok my brother. Please what is the difference between this and a performance engine? For those that don’t know and just getting started. That would be good to know.
Just what davidrc said, they do this to lower the price to get the new comers or budget friendly people in the hobby
Hey can you do more video and I was raceing with Albert to day come down to adrenaline and practice with me
Good to hear, I will be back down Adrenalina hopefully soon
Is this O.S engine made in Japan when i got. O.S Max .21 is made in Japan. Just asking because ive heard some are made In china. NVM seen on the crankcase has “Japan” on there
Is this a updated o.s VZB version 2 vspec
yes with the newer carb also
I did half bottle. Kept heat on it
Yes sir, make sure not to over heat her and you good
Yo rajaa you coming to the 🍎 race this weekend coming????
Yes sir, I’ll be there
@@rajaa111 c you there safe travels to ya
Rajaa tell your boy that got that os get the red alum carb venture inserts 6mm/6.5mm for buggy an 6.5/7mm for truggy that yellow plastic venture is a 7mm heat will mess it up if to hot on motor
Will do, so far they been running good for him
nice engine but not as strong as other O.S. R.I.P rick from rw mods
That rear bearing is steel. You can see the steel balls on rear bearing.
I wouldn't call $350+ cheap, maybe when compared to an os speed.
But it is a screamer.