Top end noise

Discussion in '1st & 2nd Generation 1983-1989' started by Uncle Billy, May 18, 2018.

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  1. Uncle Billy

    Uncle Billy New Member

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    Hi! I'm new here and have a question about top end noise in my '84 VF750F. It's not the cams, they've survived unscathed, and it's not the valves, I adjusted them about 3 hours' use ago. I remember reading somewhere about 2 or 3 years ago about the cam drive chain tensioners that apparently stick a little as the engine ages (there's 24,000 miles on the bike now), and how to unstick them. Does anybody here know about this? I'll search this forum for what I read, all 200-odd pages! Thanks in advance for any help.
     
  2. Captain 80s

    Captain 80s New Member

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    Does the rattle get louder when the engine is decelerating after revving it? If yes, then more than likely the cam chain tensioners. And they don't get "stuck", they get worn out typically. I've never heard of "unsticking" V4 CCTs.

    24K is not unreasonable mileage for tensioners to need replacing, but probably a little early compared to average.
     
  3. Uncle Billy

    Uncle Billy New Member

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    The noise has the rhythm of a loose valve adjuster and doesn't change much from revving the engine up to slowing it down. The more I think about it the more I think the valves (or at least one of them) isn't adjusted right. It's very awkward and difficult to adjust the valves unless the motor is out of the frame, which I won't do. I tried to order a special valve adjusting tool the Honda made but the website I ordered it from said they didn't have any any more. Is there a special tool for V4 valves? And if there is, where could I buy/borrow one? If it's the tensioners, how much of a job is it to replace them?

    And thanks for your responses! Nobody around here including the Honda dealer knows anything about first gen Interceptors, at least that's what they said to me when I asked if I could bring it to them.
     
  4. Captain 80s

    Captain 80s New Member

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    I don't think its the tensioners then. More than likely valve adjust, especially if it was your first V4. The tools really aren't that special but they do help. One tip is to get an extra set of feeler gages and adjust both sides of the forked rocker at the same time with the gages in place. It's kind of a juggling act but really helps on the first gen motors to get the clearances right.

    Tensioners is not a fun job. Tedious more than anything. Factory service manual a must.

    Here's an example of the tools.
    https://www.revzilla.com/motorcycle...JWj98e-H4ZHxbkRvaRsR4hMQt_KXrv-oaAg1KEALw_wcB

    You can get them individually too. Just verify that it is the dimensions you need, tappet and lock nut.
     
  5. squirrelman

    squirrelman Member

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    u need to remove radiator to get good access to front valves.
     
    Last edited: May 19, 2018
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