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genocidal_josh

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About genocidal_josh

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    TT Bronze Member

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  • Gender
    Male
  • Location
    South Africa
  • Interests
    I like bikes, which makes sense considering this is thumpertalk
  1. genocidal_josh

    2003 yz250f

    Since you got the head off turn it upside down and pour fuel on the valves if the level doesnt drop and theres no blow by on the piston its probably just head gasket but like darkside said I wouldnt take a chance after its been run with no coolant and have to strip the engine again
  2. genocidal_josh

    2003 yz250f

    Either rings (you should see discolouration around where it was leaking), a tight valve (check valve clearences) or head gasket
  3. genocidal_josh

    Wr250f losing power

    So just to update.. I checked the air filter and rubbers between the carb, engine and air box for cracks, valve clearences, replaced exhaust packing and whatever else I could think of before attacking the carb, yesterday I decided to richen it up a bit and if all else failed do a leak down test. Anyways i went for a short ride with a friend to see if it was any better, well thats when the sh*t hit the fan (the fan was on full speed) going up a very average hillclimb I lost all power, managed to downshift and get up in 1st gear then babied it the rest of the way home, when we got there my mate reckons as he was riding behind me a cloud of smoke, glitter and fairy dust was coming out of my exhaust.. so today I have to start stripping and see what damage has been done.. I dont even want to know but expecting piston and rings at the VERY LEAST..
  4. genocidal_josh

    Wr250f losing power

    Hi guys its me again.. So my bikes been running perfectly.. until Saturday. I did my air filter, lubed it up (all the normal stuff) and as a precaution loosened the tensioner to see more or less how much the timing chain had stretched (i know its not the right way but I had limited time and it was only about 2-3 turns until it locked and sprung back just fine so the chain really hasnt stretched much and tensioner seems fine) pulled off the fuel line and its getting plenty of that, I did have a nylon pre airfilter which I took off thinking it was starving for air, still no difference but now that I've taken it off its started popping just a little on decel, to describe the actual problem tho its very consistent , not revving out (so not the clutch slipping) and doesnt matter if its ice cold or boiling over, its okay on pull off (still not right tho) but from about just below mid range onwards its horrible and very laggy, missing that usual snappy response I've come to know and its not just a little because hills I would normally take in 5th and still be able to accelorate up im now having to down shift to 4th and I would imagine 3rd if the hill was long enough, I know the jetting is right for my altitude (got it all written down somewhere) theres been no changes in weather worth mentioning and I cleaned the carb not so long ago (air filter is always clean and has a fuel filter) and the spark plug is a week old. so before rip out the carb in a last ditch attempt to get it right could I be missing something? Or has someone had a similar carb related problem? (Sorry for the book I've written but too much info is better than not enough) Else theres only one more explanation, its the fox sticker I put on.. tho I was told it would give me atleast 2 more hp
  5. genocidal_josh

    WRF 02 - piston rings stuck in piston?

    What you want to do is check the clearences and then also check the shim sizes, anything under 165 / 1.65mm would normally indicate that the valves are on their way out and will need replacing else you run the risk of one snapping, honestly speaking tho it seems almost impossible to me that its so clean especially now that you say the sprockets and chain are worn out, judging by the color of the piston I would take a wild guess and say the previous owner took off the head suspecting that was the cause of the low compression ans gave it all a good clean but didnt take off the barrel and check the rings
  6. genocidal_josh

    WRF 02 - piston rings stuck in piston?

    If you ask me that head is way too clean, just as a matter of interest tho what speedo does your bike have? Because 02' WRs had the old manual type one which only goes up to 1000km then resets so Im just curious about the 3500, rings would also become stuck if your top end isnt getting enough oil feed, but if theres no wear on the barrel and piston then I doubt it, I would check the valves and put a piston in.. see what happens
  7. genocidal_josh

    Wr250f mods?

    Why change the piston? I would just use the stock piston and get a set of hotcams.. +hp
  8. genocidal_josh

    Fixing cracked fuel tanks

    Just to clarify tho, this is only a temporary fix for me until I can get another tank but with that said a friend of mine used this exact method on his YZ125's tank.. that was two years ago and to this day the only fuel that ever spilt was due to hangovers and shaking hands lol
  9. genocidal_josh

    Fixing cracked fuel tanks

    I've done about 20 miles now and so far so good I cant see any leaks but I will pull it off again today to get a better look... just ignore how dirty my tank was in those pictures I had limited time haha (but I did thoroughly clean in and around the crack) I think as long as you use plastic from another tank it should work well, what I did was with a soldering iron give the crack a nice deep V, then I cut thin strips of plastic which I melted into the V and finally I covered it with a thick layer (about the thickness of cardboard) but just make sure it melts together nicely and doesnt only cover the crack up, dont be scared to really push on the iron and get a nice groove And finally, good luck and let us know how it goes!
  10. genocidal_josh

    Fixing cracked fuel tanks

    Me again.. I've seen a few posts about this but more for small cracks and pin holes so I thought I would share my results with everyone On Saturday I went past the track planning to do just a few laps and go home due to the mud, but thats not what happened.. in mid air my feet slipped off the footpegs and my ass found the seat so thats how I landed it. Anyways I looked down while my heart was going in the same direction to see a waterfall of fuel I've attached before and after pics for you guys to look at but basically what I did was cut off a piece from an old tank I had lying around and use a soldering iron to melt the plastic together, I've put fuel in the tank and not a drop has leaked out so Im about to go for a ride and see how it holds up I dont know how it will hold up on the bumps but only time will tell, tho I do definitely think this will work well on smaller cracks (the crack on mine was about 4 or 5 inches long)
  11. genocidal_josh

    yz250f 03 rebuild in 02 motor

    on the right hand side of your head theres a bolt with a copper washer above where the metal oil pipe goes into the head, start the bike and undo that bolt.. if oil comes out its feeding to the top end
  12. genocidal_josh

    yz250f 03 rebuild in 02 motor

    how much came out? Remember most of the oil will stay in the oil tank because it runs a dry sump but about 1/4 of the oil should sit in the engine.. just double check all the galleries (holes) in your engine and pipes from your oil tank are clear
  13. genocidal_josh

    yz250f 03 rebuild in 02 motor

    Then if I may ask how have you been putting oil in your bike? Because the dip stick is on the frame between your fuel tank and handlebars..
  14. The only way you can get air in the brake line is if there's a hole in it, the master cylinder runs dry or the caliper is leaking, all of which are very noticeable things
  15. genocidal_josh

    yz250f 03 rebuild in 02 motor

    Is the oil not feeding at all or is it just a little slow? and where isnt it getting to? Remember not all of it is meant to sit in the engine hence the oil tank in the frame.. i like to measure how much oil comes out when i change mine which will tell me if my bike ever burns or loses oil, anyways to me it sounds like this is your problem with the tank - theres a one way valve to stop all the oil running back down since it runs a dry sump, if that valve is stuck open then there wont be oil in the tank I've had it happen before but it wont stop the oil feed around your engine.
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