Introduction - Hatori SB-12R Muffler - Flex mount

[spacecowboyz]

Has any one run the Hatori yet? Curious to see how those orings hold up my nitro one always leaked and blew the silicone coupler to. I have the old one on my spectra g with the stailless adapter. If i ever crash my spectra on the exaust i will need a new one and hate to spend a lot of money on some thing that leaks

[Bald-ie]

I have had maybe 20 flights on it and its holding up well so far. No problems with leaks or bolts coming loose.

[spacecowboyz]

Sweet that's what I like to here

[carey shurley]

I can now confirm that this new Hatori weighs 8.8oz

from my original muffler comparison HERE thats within 1/2oz of the lightest exhaust system I've seen

[Azalin]

Someone needs to make a performance comparison with the Quickdraw and Hatori. And maybe the new BH pipe.

[carey shurley]

there will be significant differences between any muffler and the tuned pipes.

I had hoped to be able to do some relative comparisons via an engine dyno but its going to be a while before that can happen.

[malc1]

Originally Posted by Bald-ie

I have had maybe 20 flights on it and its holding up well so far. No problems with leaks or bolts coming loose.

Just wondering, have you any sort of sealer or gasket between the muffler and the crankcase?

[carey shurley]

I always use the stock Zenoah gasket, it has material on it that sticks when it gets hot..........and replace it if I remove the muffler

[malc1]

Thanks Carey, Richard's going to sort one out for me BTW.

[Bald-ie]

Originally Posted by malc1

Just wondering, have you any sort of sealer or gasket between the muffler and the crankcase?

Nope no sealer / gasket.

I polished both the exhaust flanges with fine wet/dry on a piece of flat steel (Small surface plate) until there were no high/ low spots and it is leak free.

The only thing that I have always done with any exhaust on a heli, Is to pre heat the bolts and fit them whilst hot, then dont over tighten them, just a firm nip up.

Never had an exhaust come loose /leak yet

[malc1]

Had mine arrive from the US yesterday and have just installed it with a stock exhaust gasket.
Will hopefully try it out later on.

A much better system of mounting I think as long as the heat doesn't destroy the o rings and mounting grommets.

[Rudy]

I ran into someone flying one of these mufflers on a Trex 700 converted to gas with a VX270TT engine. I have to say it was a very quiet muffler. Much quieter then the Century V2 and the RJX that I has on my Whiplash gasser.

[carey shurley]

the Hatori's are super quiet and at least on the dyno tests I've seen allow the motors to make the most power they can with a muffler system

[Rick~K]

I see Hatori USA has the SB-12R for 225.00 and HeliProz is calling it the SB-12R-3. How's it holding up? Is the new mount doing better than the original 2 bolt type.

[Gauiguy88]

I've been using this pipe on my TRM G260PUH for the past 6months, started off reasonably quiet with a nice exhaust signature. Progressively, its gotten worse...its loud as heck now...I suspect the 2 high temp O rings are wearing out from the heat and need replacement between the header and the steel plate. Anybody know what part numbers I need and where to order from? Thanks

[carey shurley]

yes the part numbers are:

#153 Fluorine O-Rings
#185 Silicon grommets

you can get them from hatoriusa.com

[Calil]

IMO is an absurd a muffler costs more than the engine itself. I would never pay it. Somethings people simply shouldn't support buying it.

[Rudy]

Update on this product. I tried to order one direct from Hatori, and was told this product has been discontinued due to problems.

They now have a redesigned SB-12R been made stronger in the area where some had cracked in the past.

The SB-12R mounts like the RJX where you have a flange that bolts to the engine and the muffler bolts to that.

When bought direct from Hatori I paid about $235 shipped for the muffler.