Hi all, I have a controversial question and would like factual answers if possible not personal feelings. RGV250, some street riding, some track riding. Question, to remove or not to remove the oil pump and go primix?
Not that it matters but what model? VJ22? I raced a VJ22 back in the mid 90's and left it oil injection. Personally if I was doing track days or racing I would just go premix so that you know 100% your getting the right amount of oil and not have to worry about a pump failure. I have a VJ23, trying to decide this myself but I do not plan to race and minimal riding so I am leaning on just leaving the oil injection intact.
I am going full premix on the RGV500. As pathetic as this sounds....I just don't trust the oil pump. Same story in the YSR. Premix is easy, but it can be a PITA if you have an unscheduled stop and have to mix it on the spot. Even with that, I'll stick with premix.
Whats your guys technique for street gas station fill ups and premix... figuring you know how much you need per gallon in your head? Little bit of each at a time? Fill gas then pour then shake bike around like a moron for 5 min?
Take a premix measuring bottle full of oil, has all the increments on it and a good premix oil doesn't need much shaking
I have a "just in case" bottle for potential long dirt bike rides, and I marked it in "quantity per gallon" lines with a sharpie, so I just dribble one line per gallon into the tank after filling up. I also remind myself of the ounces per gallon ratio before the ride in case the markings wear off and I have to do the math on the spot.
I was recently researching this very question for my RGV project. It will be 100% track though. I found this interesting discussion from 6 years ago: http://forums.13x.com/index.php?threads/rs250-split-the-cases.310198/page-2 Also found the section in the RGV hop-up kit manual that describes the factory recommended procedure for removing/disabling the oil pump. I can send it to you if you don't already have it.
Check out page 5 and page 28. It also mentions an Oil mixture ratio of 30:1 on page 1. https://www.dropbox.com/s/t7ikat71wl2n81f/RGV250_hop_up_kit_manual.pdf?dl=0
right on, thanks. i'm not worried about math as i do that for a living haha. i was more worried about the oil dispersing evenly in the tank fuel and how long that took or how much effort it took haha. i thought to myself the other day, i've never actually had to do that ever in my life, but i'd like to be able to once these bikes are done and running.
if you use an oil that is heavy on the racing side, like motul 800, castrol 747, maxima 927, blendzall fk100, in cooler climates (below 68F) it is a bitch to completely mix the two. castors and part castors will separate out as the temperature gets cooler. it's a bitch. i set some out in a clear glass mixed at 25:1 and it clearly separates out like oil and vinegar in salad dressing at cold temperatures. in warm temperatures it does fine . keep that in mind when street mixing in the cold. also, close the damn petcock long before you mix!! lol a carburetor full of oil won't run haha. wait until you get two blocks down the road, the last of the good mix goes through the float bowl, and the pure oil finally gets in the carb. ... that was a good story and learning lesson haha
Maybe I’m just lucky but I’ve never had an oil pump fail on any of my bikes both Aprilia and Yamaha. If you adjust them properly and keep the hoses in good condition you’re good to go. If the bike is to be ridden on the street a lot, I would keep the convenience of gas and go. Carrying around bottles of premix gets to be a PITA...been there done that.
