Need to determine which jet size for rebuilt 200s engine.

[86trizinger]

I just rebuilt my 200s engine with a 10.25 Wiseco piston. I also got a brand new carb for it.

I know I need bigger jets then stock but when I pulled the jets there is no numbers on them. What is the main jet size for it? I need to know this so I can get larger jets.

Any suggestions how many sizes up should I go to start with? It has a uni filter and aftermarket exhaust.

[86trizinger]

Need some idea of even what stock is. The smaller carb I had for a atc200 had an 85 main jet in it. the 200s carb is larger so I need to figure out the starting point for a stock 200s.

[MonroeMike]

Stock main jet for a 200s is #100.

Page 39.

http://72.52.143.80/~trikes/Manuals/ATC%20manuals/ATC200S%2084-86%20Shop%20Manual.pdf

[86trizinger]

My std 200 only had a 85 main jet in it. Glad you gave me that link.

So should I start with a 110 main or go a little larger.