I have been riding my zip recently and have let the 70 kit be run in and am now going to higher speeds and I have noticed that at around 45mph it will cut out and then start up again and ride fine I have read some stuff about the main jet size I am currently running a 90 jet and I am wondering if this is the problem if it’s too small?
I'm wondering if like many sports cars these days have a top speed limited to 155mph, your ped is limited to 45mph? Just a though but can't be certain about that. Scubabiker, any ideas?