Quantcast
Jump to content

  • Join Today, It's Simple and FREE!

    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 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 zont
      Hi, I have just purchased a 2002 Yamaha Kodiak 400 I think, the vin has worn off and I have located an engine number I think it is J312E-004674, could anyone tell me where the engine number might be please
    • By StolenATV
      Attention! Stolen! From a deployed soldier on independence day! 2014 Honda Foreman 500 and 2003 Yamaha 660 Raptor. Please spread the word in helping find them. A report was filed with Franklin County as well.
      The post 2003 Yamaha 660 Raptor and 2014 Honda Foreman 500 appeared first on STOLEN 911.
      View the full article
    • By Venom
      Hi, All

      I started this project a while ago.. I have decided to make one thread I can continuously update..

      So , here we go. I got this Raptor 80 in really bad condition.. Rear end frozen, Engine toast, tires dry rotted, tons of rust..etc.. They admitted they beat on it very hard.

      Since they do not make these with a drive shaft anymore I decided to restore it from top to bottom..

      These are photos of when I got it home.

      Next up, the tear down..



      First, I needed to tear it down and determine if the rear end was still good... As we all know... That is where it would be cost prohibitive to restore if it is trashed..

      Got it completely stripped down and I lucked out... The rear Drum brake was caked solid inside with dried mud. That was causing the rear end to lock up. Took off the rear brakes and the rear end spun perfectly smooth.

      Once I got it all stripped apart I needed to take the finish off all the parts. I am going to be powder coating the frame and many parts.. Once the finish is off each part it will need to be sandblasted to white metal .. The guy I use for powder coating gives me a hefty discount if I bring the parts to him ready to go.

      You could just sand blast, but that would take a long time to get the finish off. First I used Aircraft Paint Remover.. That stuff is pretty toxic Goggles and Resperator are required. That quickly gets you down to the metal... Then you can sand blast to white metal pretty quickly...


      I had another thread I had started about a problem with the tear down... It has some great info .... here is the link... It is about removing the frame bushings. ....
       
      https://www.quadcrazy.com/atvforum/topic/14209-raptor-80-frame-bushings/?tab=comments#comment-104702
    • By JacobSlabach
      So my parents have not let me get my license yet and I need to get around to gets parts and stuff.  Answer: Yamaha CW50 scooter.  This is a 2-cycle self-mixing scooter that so far, I am really surprised with the power output and speed.  It reaches about 45mph since the speedo has been disconnected and has plenty of power for two riders.  Its stupid looking, but with some work and a title and plate, it'll take me around town..  My issue is this:  No key.  I bought it for $150 from a friend and he bought it from someone for $100 who wired in a switch in place of the ignition.  That guy got it form his neighbor who's renter left it behind.  The scooter will run with this switch on or off (kill switch on handlebar kills engine)  To get it tiled and a plate so its road worthy, I need to get the ignition working either by a replacement key or a new ignition.  All wires are cut to the ignition and the switch turned on the power to the signal light switch.  Also, the 2-cycle oil was leaking out the carb, through the air filter and onto the scooter.  also, it runs great, but its making blue smoke with throttle and the muffler is wet with oil.

      (I have new signal lights for it btw)  So the issues I have with it summed up:
      No key (need new ignition) smokes burnt out headlight-  can I replace them with LEDs?
  • 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...