Has anyone on this forum done this? I just got a set of 1990 carbs off of ebay and plan on swapping mine out.

 

Haven't done it, but it should work just great. 90's are 34mm instead of 32, so that's - conceivably - good for you.

I have a 1990 motor with my '87 carbs on it, and it went on easy and works just great.

 

I think if they get here in time, i will install them this weekend, and replace my stem bearing. Im probably going to have to pay to get my carbs synched though, it seems pretty daunting.

 

the 90s carbs had different jetting then the previous models. You may or may not have to swap out the jets depending on the work you have done to your bike.

 

it will just run rich right? I plan ongetting a kandn air filter and hotter plugs as well

 

It may and it may not. Dynojet made 2 kits for these bikes, a kit for the 87-89 bikes and the 90 bikes. Both kits came with different size jets. The K&N filter doesn't flow much more air then what you would expect. The 90 motors had more factory work done pumping out the extra horsepower. Hotter plugs may actually hurt performance.

 

I think what Camoweasel means, bhhacker; is that -just because- the 1990 carbs are bigger doesn't mean that they are going to make your bike run better. You will have to fiddle around with the idle mixture and main jet size until you decide what's right for your engine. And, you never know what's in those carbs until you open them up and take a look. Maybe the PO made some changes to them or something.

Anyway, too much gas is just as bad as not enough, so just mess with it for a while.

 

lol I dont mind having to adjust the mixtures, i just dont want that sinking feeling in my stomach because I bought a set of carbs that cant be used

 

No. It'll work great.

 

[align=left]I recently purchase a set of 1990 carbs for a 1988 honda cbr600. Bolted right up and runs great. My bike has a yoshimura full exhaust system and a Ignition advance timer kit

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