RE: OS 91 FS Surpass problems
This is not a solution to your problem but I ran into the same thing with a Saito 2.2 FS. I got on the Saito forum and I was not alone with the idle problem. No one had a fix for the problem other than using an onboard glow driver. I installed one and never looked back. Investigating this problem further I learned that the carburetor that came with the engine was the same one used on the 1.8 FS. If I were you I would purchase an onboard igniter.