Hi,
I have a problem with a KZ/GPZ 810 engine that breaths thru GPZ750 Mikuni BS carburetors and a homemade foam filter.
When I come into a corner at 5-6 krpm and slowly getting on the gas it initially bogs because of lean mixture and after a second it’s good again.
Will increasing the vacuum hole diameter help or worsen this problem?
AFR is good all the way from idle to wot except from when getting on the gas slowly in the middle of a corner.
Kr
Sixten
I don't know a lot about CV carbs, but I was under the impression that increasing the vacuum hole under the diaphragm was mainly used to raise the slide quicker. That modification is in the instructions for all DynoJet kits. I don't believe that increasing it will solve your issue. Once you drill those slides there is no going back.
Have you checked your float levels? There is no mention of that, just a thought when you mentioned going into a corner.
When you say AFR is good, how accurate are your numbers?
At the RPM you are having that issue your at the top of the tuning range for the needles so maybe richen up the needles by raising them (if adjustable or with some shim washers) and leave the main jet alone - See what that does for you.