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.

MadMan

1998 Yamaha Big Bear 350 - Disc Brake Conversion?

Recommended Posts

I own a 1998 Yamaha Big Bear 350 4x2. It has hydraulic drum front brakes and mechanical single drum brake in rear. When I bought the quad a yr ago the brakes barely worked. I installed rebuild kit for brake master cylinder, replaced wheel cylinders up front, front/rear shoes, and replaced rear brake cable. The front brakes grab sort of ok now, but the rear barely grabs at all. On a side note; If I drive through any trails with muddy water, moisture is getting inside the drums. Worse in the rear drum. These drum brakes have never worked great. They slow me down but don't have enough bite to lock up the wheels. Now I have considered my drums may have worn thin, therefore causing the shoes to not make strong enough contact (???) I'm guessing. The front brakes are spooned out so they fit snug and they work just ok. The rears I have adjusted close to the maximum setting for the actuator arm. I read online about a Yamaha 1998 Big Bear 4x4 owner using a 2004 Big Bear 4x4 front disc brakes on it. He did have to dremel and drill out the lower ball joint to make new knuckles fit since the 04 knuckle has it's ball joint on bottom. It sounded cool and the owner claimed it stopped better. I'm considering a conversion, but it sounds expensive. I hate sinking $400+ worth of disc brake parts into a quad a bought for $500, and I already replaced the existing brake parts I previously listed. I'm just tired of my brakes working poorly and every time I get into some water on the trails the drums look like a septic tank inside the next day. I live in FL and this is the land of the Swamp. There is no avoiding mudholes and water. I would like some brakes that could survive any wet conditions. Any suggestions or helpful advice is appreciated.

Share this post


Link to post
Share on other sites


i have a '91 BB with drums on the front and (single) disc on the rear.

WhyTF they engineered it that way is beyond me ???

i have searched online in forums and with conversion manufacturers and have yet to see anything for the BB's. i have seen tons of stuff for honda btw. it seems the only way you can do it is to start swapping out differentials with a later model, to avoid alot of fabrication, but, there would be alot of work going that route too. i have just come to the fact that i'm stuck with drums on a 20+ year old bike and love my grizzly that much more LOL

Share this post


Link to post
Share on other sites

LOL! Very True. I came to the same thought after researching the work entailed in converting the old beast. It's a great solid atv and has never left me stranded. Luckily the engine braking on this thing works great so I can usually stop even when the crappy drum brakes are barely working. I just like to use a parking brake when I load my big bear on my flatbed trailer and this rr brake sucks. I'm in the market for a larger newer quad so I think this old machine will remain with it's awful drum brake system.

Thanks for the advice Oxi-Blk.

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 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 
       
    • By Sp33dy0000
      Hi can someone please give me some sort of idea I have a Yamaha 600 grizzly four-wheel-drive I have put a new coil and a new stater and Pulse stater on it with new plug and steel can’t get any fire
    • By Andrew Baker
      I need help with wiring on a 1998 (I think, 10th digit of the VIN was W) Bayou. I'm not getting spark, I'm pretty sure it is due to grounds being off because the harness is pretty hacked as far as the electric start and charging system goes. I'm needing a good wiring schematic. I found one online and there are a few things that don't add up on it so I'm skeptical that it is really for my year and model. Any help would be appreciated. Thanks. 
       
  • Similar Tagged Content

    • By weblex
      Problem: The ATV starts and runs at idle perfectly. But as soon as I open the throttle, the engine starts to slow down until it stops. On the attached video you can hear the sound of how it works: see video below
      Prehistory: there is a Polaris Sportsman 500 1998, which for about 1.5 years stood in repair, including also replacing CDI with one taken from the same ATV. Finally, the vehicles were on wheels, traveled several kilometers and overheated - forgot to fill the antifreeze Came back home in small moves. The next trip started well, but after 10 km there was a feeling of a small drop in power (even as the vehicle got warm completely) but still drives. Next trip - the situation is repeated. The next test of ATV through time and a huge loss of power from the very beginning. The engine sneezes, does not want to go more than 5 mph.

      What has been done: the carburetor has been replaced with a new one (inexpensive, $ 40), a new spark plug, a new ignition coil, the engine head has been removed, the piston is in good condition, valves were corrected - but the problem was definitely not in them.

      Ignition control unit is suspected. Who faced similar? Please help in solving the problem.
      Thanks in advance.
       
       
    • Guest Fox300exchic
      By Guest Fox300exchic
      The Hop-Up: You may be saying to yourself, “that’s a chick bike,” and you’re right. But honestly, it’s so much more than that. It’s one badass bike. http://www.quadmagazine.com/quad/features/article/0,24942,1587044,00.html
    • By chuckcnm
      Hi, just picked up a MOTO 4 YFM255 and want to replace the rear brake pads. How do I get to the back. Guessing I need to remove the brake disk, question any easy way to do this?
      Thanks
    • By alexcross324
      Hi all, I try to find this manual in the threads but you have a lot of stock here
      Cannot find this particular manual.
      I found it for YFM200 but not sure if they are the same.
      Thanks if you could help me with that.
      Im new here so if I did something wrong, please tell me.
    • By Kyboy
      Iam looking for help seperating the rear brake drum and the cover. Any suggestions would be greatly appreciate
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...