my se 1900 was the bollox thrashed everyday for 2 years no problems at all i built this after blowing up my 5th and final 1600cvh, nobodies mentioned the cost of makeing a 1900 bulletproof ie not worth it compared to zvh wich is alot easier all 3 of these engines are differnt and have dif characteristics zvh,s seem smooth on the delivery 1900,s savage kick in the back to 100 then 1600, s rev monsters you lot make me piss with your bitchin about ian and specialized wonder why mine didnt go bang maybe its your tuners