New Carbs Issue

[mwat65]

I purchased a new set of carbs for my 97 Gsx and a new single carb for a 97 Gs. Installed carbs on both and both ran like crap. I finally opened the carbs up to find that they had 95 gram springs in them. I replaced the springs with black springs which I believe are 80 gram out of some old carbs and now they both run perfect. I post this because I checked everything else on the skis which was a good bit of work before I checked inside the carbs. Just wondering if anyone had a similar experience or any input on the matter.

 

[mikidymac]

Did you verify the correct jetting and needle and seat too? You can’t just slap new carbs on. You need to make sure they are jetted for your application.

 

[mwat65]

Yes everything was to spec except for the spring. Haven’t had an issue since changing springs. Plugs are a nice brown color. They start right up in the water. The carbs were set up model specific. Just wondering if there was any reason they would use the other spring.