The bonnet has plenty of clearance, but it is a 120y. I was able to reuse the main support stay so it is not that much higher than stock. I could not reuse the small stay - tiny bit too tall, but it interfered with the fuel line. With such a wide base it seems very solid anyway. It all just fits with 17mm of 5" pipe. Might have been able to get it a couple of mm lower but it needed to clear the fuel inlet on the carb, and be sufficiently tall to cover the cut-out on the breather pipe port.