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Discussion Starter · #1 ·
Hey!
I'm in need of a set of new or aftermarket new drums. Mine are finally worn down too big for the shoes to reach them.

Its my understanding too that due to the way the 2x4 is built there is no disc conversion either.

Can a machine shop add metal to them and turn it down to specs?

Help I'm on a deer lease now that has steep hills. My rear brakes are working fine but I suspect wont last long being the only brake working.

Surely someone has had this problem before me. Partzilla don't list them.
 

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I don't have a 300 but I suspect that you could do a disc brake conversion (may require some fabrication to work?) if you wanted too badly enough. You can put used brake drums on the bike too, if new ones are unavailable. Are your front brake shoes in good condition and the brake adjusters screwed out where they belong? One or more of those may need to be readjusted...? Another possibility is some air needs to be bled out of the front brakes hydraulic lines/wheel cylinders.
 

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I haven't ever really looked at a 2wd machine, but I've put 420 rancher 4x4 discs on a 4x4 300. I wonder if you couldn't put 420 2wd disc brakes on a 2wd 300?

I had to slightly enlarge the upper ball joint hole in the a arm to accommodate the slightly larger 420 upper ball joint. The lower ball joint is the same on a 300 and a 420 so everything attached at the ball joints and worked great.
 

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I have put disc on 2wd 300 , but they are all 96 and up , I had to make caliper mounting bracket and used a Rancher 2wd kit ( which is no longer available from SuperATV ) , I had a 88 2wd , it was my first 300 , at one time I looked into doing a conversion , the spindle bolt pattern on the 88 is much smaller than the later models and doesn't leave much metal for the bolt holes , but I think it could be done -----the pic shows the mounting bracket I made for the later model 300 2wd , the 88 the bolt pattern is much tighter , so you can see there is not much room to pull it off
 

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Discussion Starter · #5 · (Edited)
Thanks for the quick responses!
To Retro: Yes entire ATV stripped down to frame and sandblasted & powder coated. New brake shoes and wheel cylinders installed at that time almost 3 years ago now! Sheesh where did the time go?
I may need to check to see if adjustment needed but I adjusted them out almost to limit back then.

Jeepwm69: I havent thought of a 420 2wd. what year model? I can do some modifications if needed and have no qualms about taking to a local machine shop. I prefer doing most things if I can.

I now own a 2nd 88 Honda trx 300 2x4! Picked up for $400 from a member of my hunting club. Saw it used and rode it many times. His young son rode it too hard and broke a rear hub. Going to fix it up for the wife so we dont have to ride 2 up.

I would be wanting to install the disk brake upgrade to that one as well if the 1st project goes okay.

Fishfiles !!!! Hey Bud! I remember you! You must have snuck your response in while I was typing my reply!
Damn the luck no kit available. What about mounting the 420 spindles or maybe newer model 88 ones?
 
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