.21

I have a really nice shape roadrunner ultralight .21 complete hull and hardware with stainless tank. It also comes with a spare set of booms and front sponsons painted to match. Boat was last ran with a Mac .21. I'm asking $450+shipping OBO.

I have a barely used nitro Thunder Tiger Pro MX-R for sale. I comes with pull start housing but needs pull string and handle (I belt started it). It comes with a 180 degree header pipe. It comes with a stock carburetor but it has an out of round housing so it needs a new housing or carb. Asking...

Tunnel and Outboard for sale. Barely Used, OS XM is the version 1 and I picked it up used with the boat. Boat comes with FM receiver and servos. Neither appear to have much run time. Asking $300 for both, plus shipping or local pickup within 40 miles of Stayton, OR.

I have a 90 header that fits an OS XM that I had converted to an inboard for awhile (crazy, I know). I made it a 90 degree header with a copper fitting and high temp silicone tube. Asking $25 plus shipping.

Asking $60 shipped

I have one, used OS XM v2 for sale. It has five races on it and about four practice sessions. Asking $375 shipped continental US only. Jeff.

New in the box Silver Bullet pipe for 3.5cc outboards. No header. $50, plus shipping.

This 3.5cc K&B outboard starts and runs good. It would be a good motor for a beginner in stock tunnel. Asking $80, plus shipping. Jeff

Good evening I'm rebuilding the tunnels for the kids....both are running K&B .21.  I'm looking for two (2) outdrives...screw in style.  I know that MECOA sells them new, but checking to see if anyone has any around that they are not using and want to sell. Thanks and let me know Jesse

CMB .21 RSV07 gear drive with CMB water cooled header and CMB pipe. Engine has just been serviced with new bearings, new wrist pin and new plug. Extra new conrod, carburetor o-rings, rear bearing, and gears for gear box included. Also extra crank case included (needs new pin for fixing sleeve)...

Hi all, I hope we all had a great Christmas and New year ! Currently the conversion rate between the US and Aussie dollar is the best it has been in quite a while. This means great prices for you all in the US !! Here are the current prices for the range of SPP carbon pipes with prices...

Hi. I just tried to shim my 5 port Nova i bit tighter. But it ended up at 0.005. Do you guys think that is to tight? Fredrik.L

Novarossi .46 carbs with .470 bore made from 7075 aluminum same as all my carbs this ones have great transition from low to high with excelent top end $110 shpped to US and Canada SOLD OUT also have two .21 carbs left with .365 split bore $110 shipping included to US and Canada SOLD OUT...

Anybody know what the difference between the bore and stroke of the .21 CMB RS and the previous greenheaded LS version are? Thanks, -Mitch

Hey guys, I've never run a .21 hydro before and I was wondering what props you guys run on them? I'm looking at all aspects from heat racing, to time trials, to straightaways. I'm not looking for you guys to give out all your speed secrets, just something so you can put me in the ballpark with...

I got a .21 k&B inboard engine with the carborator on the side towards the bottom and i am kinda confused on how to make a moter mount. Any ideas???

i want to buy a .21 inboard engine for my A mono wave slave. my budget is $75.00 :)

Hello i want to convert my K&B .21 air-cooled outboard engine into an inboard .21 so that i can race in a mono. I don't know if it would work to do that with that engine. if anyone is selling a .21 give me a holler. So whats your opinion about converting that motor> Thanks B)

hey guys i was wondering of there is any way to convert a K&B .21 stock air-cooled outboard engine into a .21 inboard engine. And if so how much would it cost. thanks!! casey day

i am in the middle of a monohull project and need a .21 go engine or really any engine that would make it raceable. i will spend $80.00. if you have a engine please comment or message me. :D or i will trade a pro boat shockwave 36 hull for a engine.