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Message: <blockquote data-quote="Jules" data-source="post: 619561" data-attributes="member: 88">Auto,I replied your PM.....Tuning a kart is not difficult but you need to know the carby well. I am more familiar with the fixed jet carby like the Dellortho slide carby......which is used on the Rotax Max and also my ROK. I even had a weather station and software once to help me fine tune my engine but I think reading the plug is always a good knowledge to have. ( plus looking at the amount of exhaust smoke )So for a carby like yours - reading the plug is a must and frankly I would caution on the safe side......rich than to risk a seized engine! Of course, I had siezed them before too. Anyhow, the senior mechanics at Shah Alam like Ah Boon and Ah Miao will be of good help to your carby issues. Btw, you may need a cooler plug here so get some before you come home. They are RM75-RM80 ( Nippondenso ) a pop here....few years ago. We also used to warm up on cheap Bosch car plugs at start of the day......those were the days <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" />When you get your kart home......call me and I will meet you at Shah Alam.</blockquote>