Mikuni sells them set up for different spacing. The FJ spacing is 77-85-77. The carb spacing is adjustable but you want to buy them already set up for an FJ. The models that fit the FJ are RS36-D8-K and the RS38-D35-K . They use the stock intake manifolds but you will need individual pod air filters. RPM's great dual pod filters unfortunately won't fit. You will also need a motion pro throttle tube assembly and push pull cables. One plus is that replacing a set of cables is much cheaper than replacing a set of oem FJ cables.
 They come with a manual pull choke. My first set of carbs have a bracket that allows the use of the stock FJ choke set up but I don't know if those are still available. I don't use the choke anyway. With the accelerator pumps I just twist the throttle twice to pump in a little gas and the bike fires every time even at below  freezing temperatures.

Quote from: T Legg on February 25, 2026, 09:13:12 AMMy first FJ1100 had RS-36 carbs and it ran great with those carbs. The carbs were the old versions with bakeolite plastic slides and they started to have a hanging idle problem I couldnt fix so I bought a set of RS-38 carbs. I didn't get much if any improvement over the 36 mm carbs in HP with the stock 1100 engine and the larger carbs didn,t run as smoothly .When I put The larger 1249 cc engine in with the RS-38 carbs they seemed like a perfect fit and the bike runs very smooth.I think the RS-36 carbs would be a better fit with a stock 1100 engine.

Do the RS36/38's have the same bracket spacing as the BS36's? And use the same intake boots. Or do I need to find custom boots as well when I go to change out the carb stack?

Painting the fins won't impact engine temps. As long as youre riding you'll have plenty of air going over the engine to cool it.

If you want to give your FJ some extra cooling RPM sells a larger oil cooler kit. I installed it on my FJ because my original oil lines to my cooler were very corroded but I also wanted to have a bit more cooling because I ride a lot in summer and the FJ does get very hot.

While you have the tank off I suggest ensuring you have some proper heat shield stuck to the underside of your tank to keep some of that engine heat off the base of the tank. It gets real hot under there.

I am thinking on this one to keep forks....already rebuild with progressive spring, cartridges and plates. Did bracket for Tokico calipers as well....


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Sounds like you will need to find the right diameter (check the thickness as well) rotors and make sure they are set the same width apart as the '86 when mounted, so they center in the calipers properly.

Quote from: FJmonkey on February 25, 2026, 03:10:36 PM

Quote from: MarioR on February 25, 2026, 12:53:04 PMThanks. I'm trying to use it with '86/'87 forks.
It will need to be fitted to make it work.

Thanks

I put 88/89 forks on my '86. This was due to wanting the Blue Dot calipers. They will not bolt on to the '86 forks directly.  The other consideration is the rotor size on the FZR wheel. You will need to find a rotor of the correct diameter and if needed, an offset to center the rotor in the caliper. The 88/89 forks makes all that crap a simple bolt-on.

I am thinking on this one to keep forks....already rebuild with progressive spring, cartridges and plates. Did bracket for Tokico calipers as well....

Quote from: MarioR on February 25, 2026, 12:53:04 PMThanks. I'm trying to use it with '86/'87 forks.
It will need to be fitted to make it work.

Thanks

I put 88/89 forks on my '86. This was due to wanting the Blue Dot calipers. They will not bolt on to the '86 forks directly.  The other consideration is the rotor size on the FZR wheel. You will need to find a rotor of the correct diameter and if needed, an offset to center the rotor in the caliper. The 88/89 forks makes all that crap a simple bolt-on.

Quote from: FJmonkey on February 25, 2026, 12:46:44 PMI don't recall any spacers, direct bolt on for 88/89 forks. Even uses the stock speedo hub.

Thanks. I'm trying to use it with '86/'87 forks.
It will need to be fitted to make it work.

Thanks

I don't recall any spacers, direct bolt on for 88/89 forks. Even uses the stock speedo hub.

Quote from: FJmonkey on February 25, 2026, 10:32:28 AM

Quote from: MarioR on February 24, 2026, 04:09:50 PMSo FZR 1000 87/88 front wheel fits 86/87 forks set up?
I have 86 with progressive springs, just rebuild and anti-dice plate and wondering if I can put FZR rim straight on it.

Thanks 

I put this same wheel on my '86, then moved to my 89'. Add the RPM fork valves and the front end is greatly improved.

Do you remember spacer specs???

Quote from: MarioR on February 24, 2026, 04:09:50 PMSo FZR 1000 87/88 front wheel fits 86/87 forks set up?
I have 86 with progressive springs, just rebuild and anti-dice plate and wondering if I can put FZR rim straight on it.

Thanks 

I put this same wheel on my '86, then moved to my 89'. Add the RPM fork valves and the front end is greatly improved.