I have an '84 VF750F that has the usual cam/rocker wear problems. And I've found modifications to increase oil flow to the upper end. But they involve expensive kits or drilling a hole in the lower case, neither of which I'm partial to. In looking at the problem there seems an easier solution. Why not just tap into the oil gallery at the oil pressure switch? The hole is already threaded and is only a few inches above the point where the hole is drilled in the DIY modification. Plus, it is only inches from the existing oil pipe?
I'm surprised that no one has responded to this thread especially as this problem seems common to so many V-4's. I did find what I'm proposing on a website, sort of, and included some pictures. Notice under description the website says there may be as much as 80 PSI of pressure at this point. Also notice the price difference. The advantege is no drilling. Stock filter. A shorter run for the oil lines. Why hasn't someone thought of this sooner?
No, hole shot, as per your link, is the same as the others. I guess I could have been more clear. My proposed repair is to attach the line to the heads in place of the pressure gauage.
I'm surprised that no one has responded to this thread especially as this problem seems common to so many V-4's.
Euh.......... you join on the 9th, do not introduce yourself in the welcome section and expect people to jump to your aid within 24 hours from posting???
And then "you already found it yourself on the internet"
I -obviously- donot know you, but this is some Interesting human behavior..... :unsure:
Well, first let me say I apologize. I wasn't even aware of the 'welcome section' and when I find it will take advatage of it. gll429, in my research all I found were the numerous articles and oiling schemes. I was unaware of the cam/follower problem as outlined in the article. I read the article through, twice. Thanks for the link! I have a set of race cams from this bike's original engine. On the end of one cam is scribed Pop-Y. I'm assuming this is 'Pop' Yoshimura. One front intake lobe is damaged and most of the others have some chips out of the tips of the lobes.
I have a plan. I'm sending the cams and followers to Delta camshaft in Portland. Scott will fix the damaged lobe then ginrd all of the cams to get a smooth surface. Even ground to clean them up they will still have more lift and duration than the stock cams. The cams will then be hardened. The hard chrome will be removed from the rockers and then the rockers will be 'hard faced'. This, I'm hoping will take care of the problem. I think this is comparable to the Mega Cycle process. And Scott tells me this can be done for about $250 complete.
But having read the descriptions of the unfiltered low pressure oil used to lubricate the valve train it seems logical to do something about it? Regardless of the reason for this modification, poor oiling or cracking oil pipes, it seems the easiest place to draw the oil from is the port beneath the oil pressure switch. That is the question I really wanted answered.
My comment was from amazement that 70 people had viewed the original post but no one had commented. And I was thinking this problem was one that most on this forum would be aware of. Especially with the proliferation of 'oiling kits.'
Kevin
End of thread · 10 posts recoveredWayback Machine snapshot 12 May 2015