I have being helping a friend of mine with his improved vmax 800 last year and he has been winning often 800 improve and has been runner up often in 800 prostock and 1000 improved on the ISR circuit. He has been thinking about building a improved 1000 but has been looking for information on this with little sucess. Has anyone seen or built a 1019cc vmax 4 and is it worth the $$$$$$$$$$$$$$.