Carbureted cb !!!!

[Tev62]

The modern air-cooled CB1100 had to meet international emission standard(s) in order to be marketed viably. That might explain why lump performance is so modest.

I found it interesting to note the CB's compression ratio is 9.5:1 Vs 13.5:1 of the Aprilia Tuareg (660cc twin) I was riding a few weeks back. That is some difference. No doubt emission targets had a great role in that given the tolerances of an air-cooled engine.

Out of interest, some other four pots.:

12.2:1 for the Suzuki GSX-S1000GT
11.6:1 for the Honda CB1000R
11.8:1 for the Kawasaki Z1000SX
14:1 for the Ducati Panigale V4

[GoldOxide_imp]

I like the compression ratio on the CB1100. It really helped make burning regular octane fuel a zero thought process.

The power is there, albeit for a 1100 cc air-cooled lump.

[peterbaron]

^^+1^^

[1973cb750]

some day im gona buy a spare head and port it and install some bigger valves i have a small mill i bet i can i have bult quite a few sets of cylinder heads for cmall and big block chevys and mopars

[1973cb750]

not related but check these out

[peterbaron]

I like the silver one

[GoldOxide_imp]

I like the silver one

(+1) The lump looks familiar, perhaps classier.

[FLYTYM_imp]

I like those case savers,Active,are they available here in the U.S.?

[The Gecko_imp]

Is there anybody on the forum who knows what it takes to replace the CB1100's FI with carburetors ?
Does it involve
- changing the fuel pump ?
- the whole ignition system ?
- the ECU ...

Airbox and carbs is easy, but can the rest be done without sinking a lot of money with uncertain results ?

[1973cb750]

i love it on one hand on the other id just buy a older 1100 f seams like a lot of work