On the airbox side there is a hole that looks like there should be a adjuster screw of some kind does anybody know what Iam talking about. Or should it be that way * * *(flatslide carbs) http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif

Air box side in the bell of the carb you see a threaded hole? This is where the air jet would go if the carb was so equipped. No mach z to my kwnoledge was ever equipped with an air jet. Those carb bodies are used on other vehicles as well, some were even equipped with accelerator pumps.

Thanks, All three carbs are that way, but I wasn't sure If there was suppose to be something there. Thanks for your help. http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/thumbs-up.gif