Fed up whizzer owner
yeah that is what i thought , i ended up getting soo mad at it i sold it for scrap looking back on it i still dont feel bad about it because there was absolutely no way i could afford a replacement engine for it and that would have been the only way to fix the issueIt sounds like the valve seats. The WC1 engines were notorious for what you're describing. My 99 did it. When the engine warms up the seats come loose. If you let it sit for a minute it cools down enough that they seat again & it will start & run for a minute or 2 & then does it again.
i will never buy another whizzer again , worst experience of my life