I have run bel ray for years with no problems. I just bought a bottle of Castor 927! I opened it and used 4 ounces of it. I started up my 250R today on it and it had sat for 3 years. A few kicks primed the carb and a 4 th kick started right up. Sadly I need to sell it but if anybody’s interested in some discounted Castor 927 just pm me.