The CB1100 Community Forum

Check out the latest accessories from Samurider.

The first one, an air intake funnel, looks like a big intake port that fits into a hole in the side of the air cleaner box. It also seems like you are looking at a filter from the inside.

Apparently it needs a corresponding high flow silencer to work. Staintune anyone?

The second is a set of 4 air funnels that apparently go between the "intake manifold" ?? and the throttle bodies. These are 10mm wider than stock and are the same diameter as the throttle bodies.

So would it be something like this: 1)air intake funnel, 2)stock or K&N filter, 3) the 4 air funnels into the throttle bodies, then out via TSR headers and a hi-flow slip-on like the Staintune? I'm surely no expert and have never even seen my air filter.

Will these accessories, combined with an aftermarket full exhaust, turn the mild mannered CB into a beast?

Wow, if this dyno chart is to be believed, combining the intake funnel kit, the air funnel kit, a pipe and a power commander will add 20 horsepower! That's how you make this motor breath.
I have a performance exhaust already (Power Box Two-Tail) so I need to blow a grand to get the other stuff (wrong time of year!).
2 0 extra hp on top will be a real kick in the pants and worth every dime.
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If they gave us the fuel map that went with that dyno run I might think about it.

also I don't think its a lot of fun getting that front air box out of the way to get access for the injector "funnels".

Thanks for an interesting post. I've always believed the CB engine is capable of 100 hp with intake, fueling, and exhaust mods, based on experience with similar engines from the Kawi Z bikes. The trick is to get there without ruining either the asthetics of the bike or its rideability. Not voiding the warranty might be a consideration as well.

A free-flow exhaust, PCV, and K&N with a good dyno tune alone should get really close to 100 hp.

I wonder how difficult it is to install the intake mod?

I don't think a slip-on will get you there. You need a full exhaust to get the full benefit. That Cat has to go to let the engine breath.

(11-20-2013, 08:53 PM)The Spaceman_imp Wrote: [ -> ]Thanks for an interesting post. I've always believed the CB engine is capable of 100 hp with intake, fueling, and exhaust mods, based on experience with similar engines from the Kawi Z bikes. The trick is to get there without ruining either the asthetics of the bike or its rideability. Not voiding the warranty might be a consideration as well.

A free-flow exhaust, PCV, and K&N with a good dyno tune alone should get really close to 100 hp.

At the wheel, or net? If the former, I'm gonna call BS.

That dyno chart shows a mostly 2-3hp gain under 5.5k rpm, which is where most people spend their time meaning, you wouldn't really notice anything unless you go full-throttle a lot. For those times that I do, the extra breathing would be helpful, but enough for the cost, IMO.

The dyno chart I've seen shows 88 hp at the rear wheel stock. The same chart shows 6-8 more hp with just the 2 Bros exhaust, depending on the RPM. So you're only 5 or so hp away from 100 hp with no other mods. If you can't get 15% more hp from an EPA-strangled 1100cc engine, I'd be pretty surprised. We could do that with a Stage II kit on a primitive HD EVO for crissakes.

I've never been all that worried about the CB's power, but I'm willing to use it as a test mule. I'll need about $1k to get started, so lets start donations to the experimental fund right away!

(11-21-2013, 09:59 AM)The Spaceman_imp Wrote: [ -> ]The dyno chart I've seen shows 88 hp at the rear wheel stock. The same chart shows 6-8 more hp with just the 2 Bros exhaust, depending on the RPM. So you're only 5 or so hp away from 100 hp with no other mods. If you can't get 15% more hp from an EPA-strangled 1100cc engine, I'd be pretty surprised. We could do that with a Stage II kit on a primitive HD EVO for crissakes.

I've never been all that worried about the CB's power, but I'm willing to use it as a test mule. I'll need about $1k to get started, so lets start donations to the experimental fund right away!

If that's true, then yes, I agree. However, the bike is rated at 88hp net, and the dyno chart in this thread shows ~76hp to the rear tire. Working with that data, you're looking at 24hp to get to 100, which is more than a 30% increase in power. That's unlikely with just intake and exhaust mods, even with a proper tune, IMO. Would certainly love to be proven wrong, however.

The chart I saw can be found by searching "MASSIVE HORSEPOWER GAINS WITH TWO BROTHERS" etc. etc. Be sure to use ALL CAPS.

Since most dyno runs I've seen are done with the rear wheel on a drum, I've always assumed they're indicating rear wheel hp. Maybe that's wrong.