I have a heavily customized 1996 Yamaha royal star 1300cc V4. It still has the factory carburetors 4 carbs, one per cylinder and they're junk, they're falling apart and even after rebuilding them they still dump fuel into the engine and flood it.. The Jason Mod This is a procedure that was submitted to my original Venture forum several years ago. It was submitted by Jason Morris and thus.is called the Jason Mod. The following is the write-up done by Jason and it is followed by pictures that I took when I did it on my bike earlier today..
Marshall Mod 2nd gen By gamberch April 7, 2013 in Royal Star Venture Tech Talk ('99 - '13) Share Followers 0. The only point in mentioning this is to demonstrate that just about any Royal Star can benefit from some variation of the modifications we are describing in this article. We feel that the performance enhancement returned by this rather simple modification far exceeds what you might otherwise expect from a routine re-jet and filter replacement.