Jump to content

2001 Big bear 400 oil types


Recommended Posts

Just my opinion, I think the newer synthetic oils are great, but the older bikes were made when we were not a synthetic world. I have older bikes also, I have a 2000 Big Bear 400, I still use Dino oils in them because that is what was recommended at the time of manufacture, and changing from Dino to synthetic I seem to get leakage where I didn't have a leak before. 

Link to comment
Share on other sites

"changing from Dino to synthetic I seem to get leakage where I didn't have a leak before. ".. That's interesting Gw. Is this on oil seals ?

I think the synthetics have their place in modern engines, but in something with a wet clutch, or sharing the oil with the gearbox, I don't really see them being used to their full advantage probably and so something of an extravagance.

Link to comment
Share on other sites

Several things I have noticed when changing to synthetic oil, clutch side gasket leaks, shift lever oil seal leaks, now these are older bikes the seals may have needed changing anyway and the sludge from the Dino oil may be all that was keeping it from leaking, my theory was once the clean synthetic oil cleaned the engine the seals started leaking. I also noticed that synthetic oil same weight seems thinner and an engine that is already burning a little oil will burn more when switched to synthetic. Just my observations. 

Link to comment
Share on other sites

Ok. There's petroleum product stuff they sell to swell seals to stop leaks, perhaps the synthetic oil doesn't have enough of that in it(whatever it is), and seals shrink after the synthetics put in. Maybe..  Can't say I've noticed oil leaks though, but then I only ever put it in modern, newish, cars.

Oils are so complicated these days.. Agricultural oils especially..  Some machines are really insistent on the right oil too, or they do all sorts of strange things.  



Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Forum Topics

    • By JohnnyB
      Have a 88 LT80 that been sitting for a couple years. Bought a new piston, cylinder and head. Installed these, rolled it over and it quickly locks up.  Took carb apart. It was full of what appears to be 2 cycle oil. Cleaned it, but keeps locking up and 2 cycle oil continues to seap from exhaust port.  When i installed new cylinder, I noticed crankcase was full of oil.  I'm now wondering if that oil is what's getting sucked up into cylinder.  Should there be no oil in crankcase?  If that the case, how is crank and rod lubricated?  Sorry, never worked on a 2 stroke. Thanks!
    • By mga
      I see quite a few ads for that  Tribotex additive. It's kind of expensive, has anyone used it it their ATV or any other vehicle?
    • By HSTAR
      Hey I have a 1997 big bear 350 4x4
      I replaced the shifter shaft and the shift arm linkage and the rod when I installed them all I was unaware that you had to line the dot on the shifter shaft with the gap on the linkage arm gap put it all back  together and rode it I can't get it to shift in the right gears  I can move the shift cam by hand and goes in different gears but with the shifter shaft in it riding I can't put it in R or N 
      Anyone know how to line up the shifter shaft and the shift cam s
    • By ResQ91
      Hi guys
      My 87 Bear 350 won't start and could use a hand.
      Turn key on and Oil light turns on and then slowly fades out. (I think this is key to this) No start, not even a tick.
      battery and connections good
      A Solenoid post jump turns it over
      Neutral Safety Switch wire attached and seems good
      It has not had a wire/switch on Rear Brake Pedal ever since I had it.
      Any thoughts on some other things to troubleshoot this??
    • By Slitzer
      How often do you change oil in front/rear diffrentials and gearbox?
  • Create New...