Folks, I'm giving all the info I have on this issue. I'm an old member of vn750.com and I have a pretty new member that has recently bought an 06 vulcan 750 with less than 500 miles on it. He bought it from a dealership through consignment so as far as the PO records on oil type etc. he has none. First thing he did was change the oil to Rotella T Dyno, just in case, and he immediately started having the clutch grab on take off, even when the bike was fully warmed up. This bike has a tendency to clutch grab when it is cold, (all VN750's have this problem) but usually it goes away once the bike is warmed up. He's barely got 1000 miles on the bike but he's been bothered with the clutch grabbing so he decided to change the oil again, this time to Castrol RS V-Twin 4T. He said the clutch is still grabbing just as bad, although shifting and running very smooth, aside from the grab. I talked to him by phone this morning and told him one, I've never seen this with a warmed up 750, (had mine 3 years) and as much of a pain as it is, I would try to put up with it for a while and see if it solves its self in time. He asked me about using seafoam in the oil just prior to oil change, and I told him I've done that for years and it never caused me any problems. He's thinking about changing his oil yet again and going with the Rotella Synthetic this time, primarily because I've used it for years and never had a problem, other than the cold clutch grab issue that is normal on this model bike.
You folks have way more knowledge than I on the subject of oil, so I want to ask a few, probably ignorant questions... Could there be some incompatibility with the additives from one oil to another, or maybe the base stocks don't like each other? The 750 is a wet clutch sharing the engine oil and I know when you replace the clutch plates you are supposed to soak them in your current motor oil overnight for what ever reason before installing them. Could the old oil that has "soaked" up into the clutch plates be causing this grab with the new oil in there? Like I said, we don't know what oil was in the bike when he bought it, possibly even the break in oil, or it could have been anything, even energy conserving. do you all feel like he should just try to ride it a while and see if it calms down, or is there something else he should try? Thanks for any and all help!
You folks have way more knowledge than I on the subject of oil, so I want to ask a few, probably ignorant questions... Could there be some incompatibility with the additives from one oil to another, or maybe the base stocks don't like each other? The 750 is a wet clutch sharing the engine oil and I know when you replace the clutch plates you are supposed to soak them in your current motor oil overnight for what ever reason before installing them. Could the old oil that has "soaked" up into the clutch plates be causing this grab with the new oil in there? Like I said, we don't know what oil was in the bike when he bought it, possibly even the break in oil, or it could have been anything, even energy conserving. do you all feel like he should just try to ride it a while and see if it calms down, or is there something else he should try? Thanks for any and all help!
