Extra idle noise...or not? 1994

Discussion in 'Mechanics Garage' started by LayinLow, Jul 28, 2021.

  1. LayinLow

    LayinLow New Member

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    Hey all...haven't been on here since my FJR became my primary ride, but I still have the VFR and its kind of my dedicated hoon-mobile now. So recently I noticed something odd with the radiator. Basically I opened the radiator cap one day (cold) and saw that the radiator fluid was at about 3/4 full. This was odd because my bike runs great, I do coolant swap every 30/40k, and I have no weeping from my (3rd..lol) water pump. Turns out most of the extra seemed to be in the overflow bottle. I'm figuring that the engine was running nice and hot the last time I rode it (Atlanta summer weather), it overflowed some into the bottle but since the cap rubber is starting to shred a bit in the seal area (75k miles on bike), the suction wasn't quite enough to pull the overflow back into the rad as it cooled down. Do this times a few rides and you've got a under filled radiator. So I'm ordering a cap, which brings me to my real issue. I feel like my bike at idle is a little "knockier" than in the old days when it had less miles. I don't know if this is real, or if its because the FJR has a massive inline 4....which as we know have a totally smooth, even idle character...which makes the VFR sound chunky by comparison. I'm aware of my clutch basket noise....as well as my starter clutch is original...so theres that, but I feel like when I pull in the clutch...it doesn't make this noise go away. Its very subtle...and its not a "tick" sound like the videos of valves, its a "clocky" or "tocky" sort of sound and it seems to be biased toward the rear (hotter) cylinders. Im paranoid that maybe I overheated the rear bank by having low coolant levels I was unaware of? But heres the rub.....it runs fine.... Accelerates great...sounds great on the throttle....just a leeeetle bit louder at hot idle vs how it used to be 30k miles ago. Freak out, or just ride it till it dies and do normal maintenance as usual?
     
  2. squirrelman

    squirrelman Member

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    trying a new cap is a good idea.
     
  3. LayinLow

    LayinLow New Member

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    You think the noise is normal for a high mileage VFR and I might be being paranoid?
     
  4. squirrelman

    squirrelman Member

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    ^^ what oil have you been using ?
     
  5. ridervfr

    ridervfr Member

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    My 83,000 mile gen3 bike sounds better than the 33,000 mile gen3 bike I also have. Been using 20-50 changed either yearly or 2000 miles. 83,000 mile bike was bought with 4500 miles, 33,000 mile bike was brought home on a trailer with 15,000 miles. I think you may have to synchronize the carburetors and the noise may be less noticeable. Unbalanced v-four engines sound like they have rod knocks.
     
  6. LayinLow

    LayinLow New Member

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    Same as with all my bikes…the Actevo stuff from cycle gear/revzilla. I think 10w 40


    Doesnt lack power anywhere, or off idle though…i had read that before. Is it possible for it to run great still but be out of sync?
     
  7. ridervfr

    ridervfr Member

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    When you get the synchronization correct the bike should idle in first gear around your neighborhood where if little harry or sally ran out in front of your ride, you would be able to stop. The "synch" comes into play just a CH off idle, and while the bike is idling. Bike could be all over the place on the manometer and still run good top end and free way riding. Check the sych and then let us know. Remember your dealing with an almost 30 year old system, when was the last time they were sychronized?
     
  8. squirrelman

    squirrelman Member

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    on a high mile bike in a hot area you might try a 20W-50.
     
  9. LayinLow

    LayinLow New Member

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    Ummm never since I’ve owned it? Lol. I had my carbs out and in about 3 times when i was trying to dial in my needle shims and jets to the desnorkel with K&N mod a long time ago…so they were visually “bench synced” you could say, then. But not with the real meters…. It looks like a huge pita, so I’ve always avoided it and gotten lucky that the bike runs well.

    Will try that out…
     
  10. squirrelman

    squirrelman Member

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    how do you like your red hawk ?

    mine.....

    022_22red.JPG.5b1011c78dbd4b7648af7447f686f355.JPG
     
  11. LayinLow

    LayinLow New Member

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    Hawks big brother..lol 0C025D50-128C-411E-9A31-A6E975FC4B42.jpeg
     
  12. squirrelman

    squirrelman Member

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    hawk's little brother, VTR250, what i'm riding this summer.

    1011350737_aug12020016.JPG.5a2fe5db993bcdb6cc4fdb50c0257002.JPG
     
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  13. ridervfr

    ridervfr Member

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    You always bench "synch" the carbs when they are out of the bike, its easy and a prudent thing to do. I do the "peek-ah-boo" with the butterflies and metering hoes. Once you get them back on the bike, (probably need new insulator boots) I can literally do the synch in five minutes, it takes me more time getting the tools out of the drawers, I have these little plenum tube block offs on each of mine, I remove a rubber boot and attach the hoses and use a nurse bottle and am good to go. Warm up the bike and do your settings. Helps if you have a dedicated 90 degree screwdriver. Could go on but won't. Good luck
     
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  14. squirrelman

    squirrelman Member

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    ^^ i've explored a new and accurate way to synch carbs that would be familiar to any trumpet or woodwind player..................
     
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  15. ridervfr

    ridervfr Member

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    DO NOT BREATH IN BENZINE FUMES ferw gawds sake, would'nt a nice cold Labatts or two or three be better? :drinkers:
     
  16. LayinLow

    LayinLow New Member

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    Haha Labatts. Brings back memories of growing up in VT..lol
     
  17. LayinLow

    LayinLow New Member

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    There’s definitely upsides to owning multiple bikes. Maintaining multiple bikes though…not such an upside..lol
     
  18. ridervfr

    ridervfr Member

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    I got three street registered bikes you could hop on and go anywhere with. It take time, effort, money, mechanical savy. It is labour believe me, if you don't look after your stuff, you end up breaking down or worse. Ethanol free gas only, and always check tyre pressures before flight. Peace good luck
     
  19. squirrelman

    squirrelman Member

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    OH YEAH ! :drink1:
     
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