800 MONO
Firts post for me on here... So I will say that the 800 mono, or 800r setup as some like to call it is not always the best performer. I spend a lot of time on the HCS forums and there are a number of guys struggling to get these 800r motors to perform as well as they though they would. I think the most important variable when doing these conversions is that you cannot cut corners and expect it to run well. The most basic 800r conversions basically involve boring the cases to accept the 800 mono cylinders, plugging the injection ports and putting on a OEM head. Unfortunately these motors will rarely outrun a stock 600r motor that is clutched and jetted properly. The key components to making the 800r run well is basically time, money, and labor(or just more money) is that the upper case needs to be fully port matched with the cylinder, a aftermarket head is needed(preferably a PAR 13.6-1, if not more at elevation), 40mm carbs, a pipe that is made specifically for the motor and chassis(dynoport, or custom), updated pistons such as Wiseco or RK drop ins, possibly even the "fix kit" etc... etc... Basicly you cant cut corners... I haven't looked around here very much, but on HCS there are a bunch of threads that basically start with "my 800r doesn't beat my buddies 600r" and then they go on to say how they have a cut stock 800cfi pipe, mismatched y-pipe, OEM pistons and head, etc.. Hope this helps!