02 CR125 rebuild and other related stories.

Discussion in 'Some Assembly Required' started by tHEtREV, Dec 30, 2019.

  1. Roofchop

    Roofchop Hands up mother stickers, this is a f**k up!

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    #81
  2. tHEtREV

    tHEtREV Encouragement award recipient. tEAM iDIOT.

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    #82
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  3. Franque

    Franque Nilé na sohakélwa manga

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    How many hours has it got in it?
    #83
  4. tHEtREV

    tHEtREV Encouragement award recipient. tEAM iDIOT.

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    I'll have to check tomorrow, but it has just over 3000klm.
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  5. DRjoe

    DRjoe Long timer

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    Oh hell yea trev, congrats.

    hey when you get bored of it can i have it?
    #85
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  6. tHEtREV

    tHEtREV Encouragement award recipient. tEAM iDIOT.

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    I'm at a bit of a cross road at the moment. A few weeks ago I picked up a frame, subframe, airbox, swingarm, shock and electrical bits from a 98 YZ125, so with the parts I have left over I have enough to build up the 98 with the 2002 bottom end, 97 top end and exhaust, but I would still need to get a tank, seat and bodywork.

    I could use the coil and airboot and put the engine in the YZ250F frame and I would still need to make a few mounts and I would need swingarm and 1 linkage pivot bolts.

    Both options would need a silencer front wheel, and front and rear axles.

    I'm tempted to get the 98 in a running state (minus tank, seat and front wheel) and sell it of as a project (freeing up money for the RXV) but I kind of like the idea of having the YZ250F framed bike just for the occasional blast on the trails, but I can't see any time I would choose that over the 350, and I don't really have the money to try and get two projects up and running.
    #86
  7. cedric

    cedric Been here awhile

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    Go rip the rxv a few times and sell it off before it blows. Build up the 125 and sell it off. Find a 250 2T and sleep well at night with no worries. That's if the 350 is not ticking the boxes for you.
    #87
  8. tHEtREV

    tHEtREV Encouragement award recipient. tEAM iDIOT.

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    No the 350 is a brilliant bike and I am really enjoying it, and that's what is making it hard deciding on what I want.

    No point getting a 450 because the 350 is fairly close to it, same with a 250 4 stroke.

    Thats why I thought a 125 2T might make a nice accompaniment, but I fond I'm to old, fat and lazy for 125s these days.

    The RXV is staying, I won't be putting many K's on it (probably less than 100 a year) and if it was going to blow up it would have by now. It will get all prettied up and just sit in the shed and get dragged out for the occasional trail ride.

    But having said that I haven't ridden it yet, I may hate it and decide to shift it on before spending much money on it (no point in having a bike I don't like to ride). It's happened a few times before when I bought a bike I have lusted after only to sell it straight away after riding it because I didn't enjoy it (for some reason it has been mainly 200/250 two strokes).
    #88
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  9. Pezz_gs

    Pezz_gs Cant ride for crap

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  10. tHEtREV

    tHEtREV Encouragement award recipient. tEAM iDIOT.

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    There is an old air-cooled KDX for sale near me...
    #90
  11. Pezz_gs

    Pezz_gs Cant ride for crap

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    :thumb

    You know you want to tREV, I mean just go and have a quick look . . . . . . It cant hurt can it . . . :augie
    #91
  12. tHEtREV

    tHEtREV Encouragement award recipient. tEAM iDIOT.

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    Ha ha no.

    KDX's still go for stupid money here, I haven't seen a 95+ for under $2500 in years, 89-94 still go for over $1500 for a rough one, and they are asking $1500 for the old aircooled one near me and it has a seized engine. No thanks.
    #92
  13. greasyfatman

    greasyfatman Long timer

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    Kdx motor in a tight 125 frame?
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  14. greasyfatman

    greasyfatman Long timer

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    Properly ported and piped yz144 is a blast of a woods bike. Around 200lbs and sweet in the mid range.
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  15. tHEtREV

    tHEtREV Encouragement award recipient. tEAM iDIOT.

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    I haven't been out in the shed much lately, I did put the 02 bottom end back together and tried to put the 02 cylinder on it but found the head gasket O ring wouldn't fit, so I tried a few others I had for the 125 but they were all a tad big. So I hit the computer and found that Athena cylinders use a different O ring than the OEM cylinders so I put the 97 cylinder and head on it.

    Put it in the 98 frame, found a seat that fits it, and then decided I would keep going with the 125 engine in the YZF frame.

    I still need axles, front wheel, linkage bolts and clutch cable but it is getting closer. I even started it and ran it for a while.

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    In the mean time an old DT200 entered the yard.

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    I debated about buying it for a while because body work is so hard to find for these things, and I remember riding one years ago and being thoroughly unimpressed by it but decided to check it out because I have pretty much gone as far as I can with the 125/YZF until I get some more parts, but after checking it over and talking to the guy I put in an offer I assumed he would reject but he took it.

    It is in poor condition, missing the head and rear brakes but I got it cheap enough that I can see how hard it would be to adapt to the 125 (or YZf frame) frame and be able to sell it off in parts even if I decide it is to hard.

    But I also don't like how many people are selling bikes of in parts at the moment and I am much more tempted to get it into a rideable state and sell it of in the hopes that the next owner will do something with it rather than sell it of as parts. I like the idea of saving as many of these old clunkers from the scrap heap as I can...
    #95
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  16. greasyfatman

    greasyfatman Long timer

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    I have been able to heat o rings and they let out distillate and shrink.
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  17. tHEtREV

    tHEtREV Encouragement award recipient. tEAM iDIOT.

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    Just wheeled this of the work bench...

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    #97
  18. tHEtREV

    tHEtREV Encouragement award recipient. tEAM iDIOT.

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    Haven't updated this for a while because progress has been slow. first ride I took it on it sheared the flywheel key about 15 mins into the ride.



    20210620_103722.jpg

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    I replaced that and swapped flywheels for the 97 I had sitting here not knowing that the 97 and 02 flywheels are slightly different and while it started fine it would only get to about half revs and would act like it was hitting a rev limiter (I just made sure it started before I took it out on a ride, didn't test ride it) so I did a 10 or so K lap in the lower rev range. It was slow.

    So know I have the original flywheel back on and all is good, also just out on new tyres and a new clutch cable.


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    Attached Files:

    #98
  19. tHEtREV

    tHEtREV Encouragement award recipient. tEAM iDIOT.

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    Took it on a trail ride on Sunday and even managed to get my pic taken.
    246153472_372355161343663_1845352996095201017_n.jpg

    Really enjoyed it, was better than I expected in the slow stuff. Only thing I didn't like was stalling it going down a gully and having to roll to the bottom to kick it and blast up the steep gully wall with no run up. Made it pretty easily.

    I'm seriously thinking about putting it back in the standard frame just to make things easier though.
    #99
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  20. tHEtREV

    tHEtREV Encouragement award recipient. tEAM iDIOT.

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    Took the YZ/YZF out again a few weeks ago, managed to get photoed again (along with about 1000 other people).

    247885150_391099222802590_6292268799997972791_n.jpg

    This time I was with a few other people on the ride and had to try really hard to keep up. And then I made the mistake of riding a 2021 WR450f.

    I also manged to pretzel my phone while helping a young girl get her bike out of a rut so I lost all my photos.

    Photos like the 2010 YZ450f I picked up but decided the $600 in parts wasn't worth it (because I didn't think I wanted a 450) so I sold it on and with the profit I got a pile of 06 YZ250F parts and with the rest of the money I bought parts to put the YZ back to standard.

    This is how it started last week.
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    And how it sits this afternoon.

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    I got lucky at a swap meet last week and bought a shitload of YZ and WR parts that had a lot of little things I needed, and this morning I spent a few hundred at another swap and got a heap of blue bling bits to hang of the bike in the hope it makes it easier to sell.