hey all, i have a 1980 kz750e1 with vm 24s on it. im having issues with the bike im thinking mostly due to the carbs. i have a 4 in to 1 delkevic header with no baffle, and uni pod filters. what jetting will work for this setup? i have 35 pilot, 147.5 main, and the needles are 31. bike with the filters on will fall flat on its face at 5500-6000 rpm, without the filters i dont have this issue.
Welcome.
VM24's were used mainly on KZ650's. That jetting you have there is super rich even for pipe/pods.
Normal jetting for those carbs with pipe/pod (regardless of engine size) is around 17.5 pilot and 110 main with the stock needle on the 4th clip. This is assuming you have good compression and spark.
I ran VM24's on my 831cc hopped up 650 engine with stock air box and dual exhaust, it ran great with stock jetting (15 pilot and 105 main) Engine is well over GPZ specs. The small carbs will pull good to redline but you loose top end HP due to flow capability. They are great for in town and stoplight racing!
