Quantcast
Jump to content

  • Do you own an ATV? Join our Forum!

    As a member, you can post in our forums, upload your photos and videos, use and contribute to our downloads, create your own member page, add your ATV events, and even start your own ATV club to host your own club forum and gallery.  Registration is fast and you can even login with social network accounts to sync your profiles and content.

black250ex

new to me Big Bear 350 issues

Recommended Posts

Hey guys,

I was just given a yamaha big bear 350 by my neighbor, and I need some guidance. This quad has definitely lived a hard life but I would like to breathe a little life back into it. It starts up and idles great, and shifts into first fine, but its having a really tough time getting into any gear higher than 1st. When I am able to shift it into a higher gear the shifter gets hung up until i push it back down with my foot. My plan as of now is just to change all the fluids, and adjust the clutch according to the manual and see if that helps at all. Any other ideas are very much appreciated.

Also, I cant find a VIN# anywhere on the thing, but I think its a 1997. Its an "SE" 4x4 with the h/l/r selector right next to the engine.

Share this post


Link to post
Share on other sites


Try this...from neutral pull the shifter up and hold it there and try to move...DON'T DROP IT DOWN WHILE REVVED...if the bike still feels like it's in neutral there and drives good in first your clutch is adjusted fine where it is and can be tedious getting it back.....after that u could try changing your oil if it looks that bad but I'd get a new clutch cover gasket and take the cover off its the big one on right hand side there's about 12 8 mm bolts. An oIL line and your reverse switch......when pulling the cover off there's a few pieces that can fall out a plate with 3 ball bearings in it (fixed) they can't fall out.. a spring and a couple pie shaped gears....all part of your secondary clutch....n just go from there make sure shaft from shifter to cam isn't bent n binding...something in there is probably binding unless it's right inside the crank case.....if it is I have a crank case/transmission I could sell.....I have 1 with the high/lo version off a 99 Kodiak. ..in 2000 they changed the name of the Kodiak to big bear and gave the Kodiak a CVT. ....and I have one off a 350 wolverine without the hi/lo option ..

Share this post


Link to post
Share on other sites

Thanks for the response, gangle.

I tried what you said, but when I shift into first and keep the lever up it pulls forward like its in gear. However, I took it for a quick spin and it seemed to shift fine through all the gears. I wasnt able to ride it very long due to some carb issues, but it seemed ok. I changed the oil with Rotella T6 5w40 and also changed the fluid in both diffs, after I get my carb kit I should be able to take it out for a ride and post an update.

Share this post


Link to post
Share on other sites

How it's running is not ok ....your clutch is out of adjustment. Way out. My guess is the clutch started slipping and the past guy backed the adj. Screw all the way out thinking it would be tighter but it's not...your secondary clutch (clutch pack) is not doing its job at all..it's job is to take the quad out of gear when u push up or down on shift lever just like a standard clutch...that's why your having trouble shifting....what u have to do is turn adj. Screw in 1/8th of a turn. Pull lever up/down. Hold and hit gas. If the quad is trying to move repeat until it doesn't. And once u get that set up so it's not trying to move go for a rip and make sure it doesn't slip....it shouldn't. .. if it does just back it out 1/8th of a turn .....the way it is now is hard on transmission gears...also if clutch is slipping...I won't get tout into it but make sure your running a jaso-MA certified oil...and definitely no synthetics that's aren't jaso-MA approved..they will swell your clutche's cause premature wear and slip

Share this post


Link to post
Share on other sites

Nvm about oil didn't finish reading your post...I run the same oil it's jaso-MA approved by shell not certified but a proved I run the same stuff in my 400

Share this post


Link to post
Share on other sites


I tried adjusting the clutch like you suggested, and no matter how I adjusted it the quad wouldn't go into neutral while holding the shift lever up. Im assuming my clutch is toast?

Share this post


Link to post
Share on other sites

Nope if clutch was toast it'd be slipping there's something wrong inside that clutch cover ..something with the whole secondary shift mechanism. U try turning it both ways? If I remember right they are backwards threads. It might not be worth the hassle with a free bike...it's an easy fix ...without a picture or diagram it's hard to describe how it works n I can't find one...it shouldn't hurt anything if u completely let gas go when shifting...the primary (centrifugal) clutch actually has a one way bearing so if the wheels are spilling the clutch bell (outer part) faster then the cent. clutch is spinning there is no pressure on any gears when shifting.. it's a personal thing is u wanna year it apart n possibly spend a few bucKS giver if not dont

Share this post


Link to post
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.

Guest
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 Topics

    • By Asen_77
      Hi All,
      My name is Asen and I am from Eastern Europe, Bulgaria. Riding a Yamaha Raptor 700R and this is my first Quad wanted for a vey long time :)

       
    • By dgk_mike
      It will go into neutral, 1st, 2nd, and reverse but nothing after 2nd gear. The shifter moves freely going up completely nothing but when you shift down it works. I’m not sure if it’s tranny issue worth messing with or if I should just buy a new one.  Overall besides that the thing runs like new.

    • By StolenATV
      Taken from my car port around 0330 and was taken by at least 2 people found footprints pushing the quad all the way to the road (80 yards)
      The post 2012 Yamaha Grizzly 700 EFI 4×4 Stolen appeared first on STOLEN 911.
      View the full article
    • By mothrottle
      The VIN on my 2018 Kodiak 450 is not where it's supposed to be. I bought this used. Is there another "hidden" location where I can find it? Need the number for insurance co. Thanks in advance.
    • By Admin
      Looking for Yamaha ATV VIN (Vehicle Identification Number) Number Decoders? Once you find your ATV VIN number off the tag on your Yamaha ATV, you can go to all kinds of websites that have VIN Decoders available. The best ones are backed by the Yamaha ATV manufacturer, however there are plenty of aftermarket Yamaha ATV VIN Decoder websites on the web. This topic will stay pinned and if you find any to add, please do it with a reply. 
      The following Yamaha ATV VIN Decoder websites are available where you can just enter your VIN number and it will shows you some of your ATV model details:
      KBB.com https://www.kbb.com/vehicle-history-report/ 
      CARFAX https://www.carfax.com
      autoDNA https://www.autodna.com
      VinAudit http://www.vinaudit.com/
      decodeTHIS https://www.decodethis.com
      VINCario https://vindecoder.eu/
      NICB Theft Check https://www.nicb.org/theft_and_fraud_awareness/vincheck 
       
  • Similar Tagged Content

    • By Nate Hanson
      I am a new atv owner...I bought a used atv this summer (pretty sure it is a wolverine but reg card from last owner didnt actually say that so idk for sure). It ran great for most the summer and early fall but one day I tried starting it and it turned over a while without starting and then suddenly it quit turning over at all. No click or anything.
      I charged battery and light turns on showing neutral and heatlight can go on.
      A few other things that may be pertinent: The pull start is missing, I have a fluke multimeter but not many other advanced tools (or relevant experience), there is an extra aftermarket led light attached to front but it doesnt work either... never looked into why since I didnt need it. 
      I looked for a fuse box and didnt find one.
      Please recommend some easier things to try first as I really want to avoid taking it in if I can (having one income and 4 kids can keep out extra cash, plus I want to learn). Pictures would be awesome if possible. Thanks! 
    • By Kanyon Pershing
      I have recently rebuilt my Yamaha warrior 350 engine and when I got it all back together with no “spare parts” i went to start it and realized it’s in reverse. I went to put it in drive and the shifter won’t budge, I took the linkage off and tried to use vise grips but it won’t budge at all. Any help would be greatly appreciated. I’m hoping it’s not something internal! 
    • By YamahaBB350
      I have a Yamaha Big Bear 350 and the reverse doesn’t work, it shifts from low to high easily but it won’t go back to reverse. I’m new to this stuff, so I’ll take any help. Any ideas? 
    • By Colin James Krepela
      So here's the deal people, I have an old Avenger 350 4X4 Shaft Driven ATV. They only made them in the early 80's their thought of as the first four wheelers from around back when Suzuki made one in 1982. I believe the engine on it is a Kohler as I watched this video https://www.bing.com/videos/search?q=avenger+400+atv&view=detail&mid=1E10E939019CA07770031E10E939019CA0777003&FORM=VIRE but mine is a 350. That's if its original, and it all looks original. I am wondering where I can get parts for this engine, or really what engine is it. I have no way to find the year, unless you guys know where a serial number might be. Every sticker is worn off. IF anyone has any information at all on these old wheelers it would be greatly appreciated. I specifically need the gaskets for the carb, and don't tell me I could build them please I want to restore it as perfectly as I can. I can take pictures of the wheeler/carb if it'll help. Let me know.
    • By oleskool
      Has new top end, piston, rings, valves, etc. great compression, good spark, plenty of fuel. Valves have been set. timing has been tripled checked. Can not get it to start. any ideas suggestions on anything I am missing. Also if anyone has the service manual it would be greatly appreciated.

      Thanks
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...