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RS36 or RS38 for 1150

niclpnut

niclpnut

Forum Mentor
Past Site Supporter
I'm planning a heart transplant for an 83 1100e with a stock 1150 engine.

I have 2 sets of BS36 carbs but both have siezed choke valves and I'm not having any luck with removing them. Therefore I'm looking for advice in which RS size to work best with a stock 1150 motor to be used mainly on the street and occasionally on the track.

Baseline jetting for pods/4-1 would also be appreciated.

I'm also looking at cv36 or 38 carbs from a gsxr or bandit as I've read they may be more conducive for street use.

Any advice is appreciated.

Nic
 
I've been running 1990 GSXR 11 36mm carbs for about 12 years now. First time was with a stock 1150 motor, with a Yosh pipe and pods.
For whatever reason it ran the first time I put them on and then maybe a week or so. The throttle response was surprisingly quick, compared to stock.

I bought the carbs used with a dynojet kit a K&N filters already installed. Then fouling of plugs begun to happen repeatedly.
Discovered much later the needle jets (emulsion tubes) oval out, causing an overly rich condition, along with all the ancient O-rings.
The 160 main jets may have contributed to that. They're also very temperamental with float height.
The GSXR's seem to have a more angled intake tract than a stock GS. I'm on my third set of emulsion tubes at $100 a pop.

I switched to a Factory jet kit and currently running 32.5 pilots 142.5 mains, needle on the middle clip.
My float height may still be a bit lean, but I was trying to compensate for worn out parts, but have been lowering them (15.5-16.5mm)

With a big bore kit and worn out carb internals I was getting 33 mpg. Now I'm getting over 44 mpg on a regular basis.

The low end still needs some finer tuning, but the mixture was pretty good when I had it dynoed at a track day.
 
If you are going RS carbs, definitely the 36's. Unless you are going with a big bore (1300+) and cams in the future IMHO.
 
niclpnut said:
Thanks for the replies. Would the gsxr 38mm carbs be too much for the engine?
Click to expand...
I dont think they would be too big, but AFAIK they didnt come on US models. I had a set of 40mm ones and they were and odd type of setup, couldnt get any filters to fit properly. Hard to find parts for them too.
 
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