I'm not sure what is causing the seal to come apart I end up with little bits of rubber in the fluid, it came with dot 4 so thats what I have been using
high quality , large view port , light and cool. But its not a motorcycle helmet so could be a problem using it at a NETA event rules say motorcycle helmets only
gas gas oil and fuel mix
in Gas Gas
Posted
I have mixed 100:1 in my last 3 gasgas trials bikes ipone oil never had any problems