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300ex

  1. 300ex starter/solenoid/battery wiring diagram

    Honda ATV Schematics / Manual Help
    Anybody able to provide this? Picked up a 95 300ex that had the starter wired wrong and fried all the wiring. Everything is ripped apart and I don't know what goes where nor can find any information about wiring schematics for it. I can take a picture so somebody can tell me wtf to do lol...
  2. 04 300ex battery won’t stay charged

    Repair & Maintenance
    I had recently noticed my battery not staying charged on ride due to it dying several times and became to think it was the stator or regulator so I replaced both of them. I’m still currently having this issue and don’t know where else to look....
  3. need modifacation help

    Repair & Maintenance
    i need to know what the best things for me to do to get the best performance out of my 03 300ex. i just bought it and i was told it was bored has a stroker piston performance racing clutch after market sprokets n chain. i know it has after market exhaust but not sure bout everything else. the...
  4. Need suggestions on mods 4 my 300EX

    Performance Modifications
    Well i need all the help i can get. I just bought myself a 2003 TRX-300-EX that i know very lettle about. I know that he had put a stroker piston and has been bored...but i dont know how much. It has a raching clutch and new sprokets and chain. It had FMF header and silencer.he wrecked it and...
  5. Brake rebuild 02' 300EX

    Brakes & Suspension
    Hello there, Perhaps you could help me...I am rebuilding the brakes on my 2002 300EX. I have removed all three calipers, dissassembled them, and cleaned all the pistons, seals, yada yada yada. My first question is about bleeding the front brakes. Although it does not say explicitly in the...
  6. 300ex jetting(not quite right)

    Performance Modifications
    Alright i got my 300ex going a running good finally and i figured i would have to rejet so my brother had the stock jet out of his 400ex a 148 so just for kicks i put it in just to see how far off it would be. I did a plug check and its not far off. I have good throttle response good when i...
  7. 300ex swing arm upgrade question

    Performance Modifications
    The bearings in my swing arm are shot. And i know its not fun at all to take them out and change them. So im looking at changing it out with a differnent one. Would a 400ex one extend it at all? Or do i have to get a 250r or 450r one? Either way it needs to be changed so i need any information i...
  8. 300ex motor question

    Repair & Maintenance
    Most of you are firmiliar with my quad and what i have done for those who dont I put a new crank in it. Now i have a question. The guy i baught it off of a.k.a. my brother now admits that he had the whole motor tore apart as far as i did and he lets just say had a couple extra pieces when he was...
  9. In need of all the help i can get

    Repair & Maintenance
    Ok i tore the whole motor down to cracking the cases and put in a crank i got out of a 2006 300ex because my rod bearings were boned. I put it all back togeather and started it up and it sounds great but when i try to shift it into gear its really hard to push down into first and it stalls...
  10. Selling my 300ex for a 400ex and cash.

    ATVs For Sale
    Im putting my 300ex up for sale pretty soon here and im really just wondering how much you guys think i could get out of it. Im really just lost about how much its worth. Its got all the seals and gaskets on the motor brand new, brand new stock bore high compression piston and rings, an amr...
  11. Rebuilding my 300ex need advice

    Repair & Maintenance
    Ok so im rebuilding my 300ex and i need some advice. Basically i wanna know how hard it would be to make it as fast as say a stock 400ex. Or if i would be better off parting out what i got and saving for a 400? I got alot of money in it already and i would rather build it and make it everything...
  12. 300ex oil pump?

    Repair & Maintenance
    Ok heres the deal i put a stage 2 webcam and hardened rockers in my 300ex and i went riding 2 day or at least tryed. Got aboult a mile away from where we parked the trucks and it started to lose power going down the road then i gave it more gas and it stalled. It starts right up idles fine but...
  13. 300ex cam change questions

    Repair & Maintenance
    K well just got my cam and rockers changed and i got a few quick questions. When you do this should u have to adjust the idle? and will i need 2 rejet?
  14. 98 300ex wont start!!

    Repair & Maintenance
    so i bought a 98 300ex today and was told that there was no spark now but it was recently rebuilt and only 10 hours of ride time. i got it home and checked the spark and its fine. its turning over and has some compression, no guage yet so i dont know how much. i took the old gas out and removed...
  15. 300ex cam replacement

    Repair & Maintenance
    Ok heres the deal i faught with my valves for a long time and finally got frustrated and ripped the valve cover off and saw that the rockers are toast and the cam is fried. Now i got a stage 2 web cam and hardened rockers real cheap and they look perfect. Got the rockers in and thats no big deal...
  16. 300ex valve adjusting problem

    Repair & Maintenance
    K my valves have been giving me hell. They sound like a ticking time bomb and i have adjusted them a bunch of times. I adjust them and by them im talking about the exhaust valves. the other ones sound and are adjusted fine. any ways i adjust them to .004 and they still tap. They arent moving at...
  17. Rim Size

    Wheels & Tires
    I Have a rear set of 18x10x9 razr tires and was wondering if anyone knows what size rims will fit them. Thanks.
  18. 300ex cdi

    Performance Modifications
    Looking to upgrade my cdi was wondering about good brands pretty cheap. And does a stock 400ex cdi fit on a 300ex and would that upgrade anything? Thanks!
  19. 300ex jetting problem/questions

    Performance Modifications
    I got a 1996 300ex with a k&n w/ outerware and removed airbox lid and a hmf slip on with stock head pipe. Really no other performance mods but i got a 40 pilot with a 130 main in it does that sound correct? Cuz i tryed 2 do a spark plug check but its freezing cold here and almost 2 feet of snow...
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