Semi-budget vinduro basher: 10/'81 IT250J

Discussion in '2 smokers' started by G54B, Oct 30, 2013.

  1. G54B

    G54B Adventurer

    Joined:
    Oct 29, 2013
    Oddometer:
    67
    Location:
    Gunningbland, NSW, Australia
    Bought this ratty-yet-mostly-there '81 IT250 for $700 last Monday. Might seem a tad steep to those of you used to being able to pick such examples up for a case, but hey, this is 'Straya. Shit that shouldn't cost money, does.
    [​IMG]

    Done so far:
    -Broke the killswitch off the IT switchblock, so it's got the throttle/killswitch assembly and grips from my old '80 DT175 on it. Cable sheath ends are different, but it works.
    -LHS chain/rear wheel adjusty jigger was chewed to shit on the inside, flipped it and she's apples for now. Will eventually find a replacement.
    -Pulled the forks apart; RHS is fine, nice and clean, just needs new seals. LHS is rooted, looks like someone decided that seawater would be an awesome substitute for fork oil. Turned out OK after a hit with the wire wheel and a few days in a tub of molasses to kill the rust. The guts are pretty ugly, but the valves are clean and all seal surfaces are fine.

    To do:
    -Base gasket, possibly crank seals
    -Gearbox oil change
    -Front tyre
    -Headlight

    Plans for this thing are mainly to just tidy it up a bit and tear around the 5,000 acres I have at my disposal plus the firetrails in the adjoining state forest, but I plan on hitting a few vinduros next year as well. Should be fun :)
    #1
  2. G54B

    G54B Adventurer

    Joined:
    Oct 29, 2013
    Oddometer:
    67
    Location:
    Gunningbland, NSW, Australia
    Couldn't/can't sleep (yay, insomnia!), so I went out and threw the exhaust/plastics/tank/seat back on it, mixed up 5L of fuel at 20:1 as per the tank sticker and kicked the old bird over. It hadn't been started in six months or so, so I wasn't expecting much.
    Killswitch off, fuel on, choke on, twist of the throttle, kick, kick, she lives!!! :D :D
    Killed it pretty quick, seeing as it's 3:15am and it's a friggin' noisy old thing, but it runs. As I was told, it leaks around the base gasket, but sounds healthy otherwise. Should be good once I do the base gasket and finish rebuilding the forks. Good enough to give my cousin and his pesky XR250 a fright at any rate, even if it's only because I've shot off into the scrub due to brake fade :rofl:
    #2
  3. Mr. Carts

    Mr. Carts Been here awhile

    Joined:
    Jan 14, 2010
    Oddometer:
    411
    Location:
    Cahuilla Mountian
    #3
  4. Edmond Dantès

    Edmond Dantès The Kanto Pain

    Joined:
    Jul 2, 2009
    Oddometer:
    772
    Location:
    Château d'If
    Strewth mate, did a camera from 1981 come with the bike? It's either that or I have had one too many VBs this evening.

    Only ribbing. Welcome to the forum, and make sure to post pics of the resto project.
    #4
  5. G54B

    G54B Adventurer

    Joined:
    Oct 29, 2013
    Oddometer:
    67
    Location:
    Gunningbland, NSW, Australia
    Yamahait's been down for a while now, bit shit. Been using vinduro.com.au and this place to get my fix, haha

    As for the camera, $129 Chinese phone. That is all. My camera's battery's flat and the cord's gone for a wander, so yeah.
    #5
  6. G54B

    G54B Adventurer

    Joined:
    Oct 29, 2013
    Oddometer:
    67
    Location:
    Gunningbland, NSW, Australia
    Minor update: base gasket is done, runs like a champ. Now with 100% less escaping compression!
    Now to get the forks together so I can go for a ride, get it warmed up properly and see if it'll be needing crank seals.

    Pictures and hopefully a first ride report tomorrow. How sad's that, I've owned the bike for a couple weeks now and haven't yet ridden it, lol
    #6
  7. AustinJake

    AustinJake DR650 - Versys

    Joined:
    Aug 20, 2010
    Oddometer:
    4,432
    Location:
    Austin, TX
    <IMG WIDTH="500" SRC="https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-frc1/906147_10200914525734304_1267211419_o.jpg">
    #7
  8. Edmond Dantès

    Edmond Dantès The Kanto Pain

    Joined:
    Jul 2, 2009
    Oddometer:
    772
    Location:
    Château d'If
    @Austinjake: Crickey, I can't believe that is the same bike!
    #8
  9. Ruffus

    Ruffus Dirty Old Mudder

    Joined:
    Jan 22, 2006
    Oddometer:
    4,136
    Location:
    Fort Erie,Ontario
    Good looking bike. Just something odd I've noticed since searching out these bikes. Mine was an 81, but all white. Almost all the pictures I see of 81's from south of the border are blue. :dunno

    [​IMG]

    P.S. This is a picture I found of somebody else's & pretty well the only one I could find in white.
    Does anyone know the reasoning behind the color difference besides the white ones being faster? :lol3:pynd
    #9
  10. YZEtc

    YZEtc Feel lucky?

    Joined:
    Nov 19, 2010
    Oddometer:
    215
    Location:
    Connecticut
    In the USA, the Yamaha ITs of 1981 were all white, and the only model year for that.
    1980 were blue and white.
    1982 were back to all blue until the last model year an IT was sold in the USA, which was the 1986 IT-200S.
    #10
  11. G54B

    G54B Adventurer

    Joined:
    Oct 29, 2013
    Oddometer:
    67
    Location:
    Gunningbland, NSW, Australia
    ITs are a pretty good-looking bike, but this one? Not so much, lol. Mechanically it's pretty good bar the forks and possibly the crank seals, but cosmetically it's a bucket. Missing lights, sunburnt plastics etc.

    As for the colour thing, I'd think it'd be the usual regional market differences. Bit like how GM slapped an ugly nose and LHD on/in our VX-VZ Holden Monaro and sold it to you lot as the Pontiac GTO last decade.
    #11
  12. G54B

    G54B Adventurer

    Joined:
    Oct 29, 2013
    Oddometer:
    67
    Location:
    Gunningbland, NSW, Australia
    No pictures to show of the work carried out in rebuilding the forks, but I do have one of the finished product!
    [​IMG]

    Jumping on this after having not ridden anything faster than my little '76 XL100 for quite a while was a bit of a surprise, I nearly looped it the first time I got it on the pipe :rofl:
    It does have a bit of an air leak somewhere as it will hunt around rather alarmingly at times, but for all that it actually runs and rides really well. Chugs along reasonably well in first crawling up and down the gravel pits in the local state forest provided I'm not too sparse with the clutch, and has more than enough power once on the pipe to get my 118kg moving at a rate of knots that I'm not entirely comfortable with when I'm relying on a TLS drum to pull me up, lol.

    Next job: Crank seals. I'll also have to work out a way to seal the airbox, some numpty PO hacked holes in it.
    As for the brakes, I've read that a TT250/350 disc front end bolts up, so I'll keep my eye out. Should be easier to source than an IT200S front end, at any rate.
    #12
  13. MCRatworks

    MCRatworks Oil Burning Suzuki!!

    Joined:
    Jul 21, 2013
    Oddometer:
    25
    Location:
    In the Shed, surrounded by Suzukis (Tasmania, AUS)
    That`s OK mate. I`ve had a 1982 TT 250 for nigh on TEN YEARS and never even heard the white bastard fire up.

    Thats after spending 600 early 2000`s Aussie dollars in getting the top end re manufactured ( some fuckwit was too lazy to scrape old gaskets and blocked an oil gallery. Tappets looked like someone had taken an angle grinder to em. Not to mention the camshaft condition. Funny thing is, i KNOW the person who did it!)

    Some people need to be neutered at birth, so their spawns can never own motorcycles.

    Dave
    #13
  14. G54B

    G54B Adventurer

    Joined:
    Oct 29, 2013
    Oddometer:
    67
    Location:
    Gunningbland, NSW, Australia
    Thread resurrection. Looks much the same, bag's not there, the one surviving tank sticker blew off on the way to go riding with a mate and it's covered in a mixture of the things dirtbikes are usually covered in and oily dirty shit from a split fuel line.

    Recent issues:
    -There were a few age-related cracks in the LHS of the tank that decided to start leaking on me, got them plastic-welded shut and she's apples. Belted it with a rubber mallet, dropped it on that side whilst moving sheep, held up fine. It's ugly, but hey, it worked. Besides, that's what tank covers are for.
    -Pulled up to open a gate last weekend and discovered that it was literally pouring fuel out the carb overflows. Fuel tap doesn't really work, but it doesn't cause the carb to piss fuel everywhere either. Guessing stuck float, gonna pull it apart and give it a good clean when I'm not quite so flat out with sowing.
    -One of the zipties holding the RHS fork boot in place broke. Big stuff, I know.

    Other than that it's been super reliable. Stomps all over my cousin's XR250 everywhere (only due to the horsepower advantage, he's bloody quick on that thing), walks away from my brother's XR600 in the tighter stuff, so I'm happy. That said, if my brother wasn't a slowcoach I'd say the big bitch would probably give this thing a good scare, especially given it's 10yr advanced suspension and disc brakes. Neither are a strong point with the ITs.
    Shit-tonnes of fun to ride, plenty of power, super stable, handles like a barge in the singletrack but there's not a lot of that around here so meh.
    #14
  15. G54B

    G54B Adventurer

    Joined:
    Oct 29, 2013
    Oddometer:
    67
    Location:
    Gunningbland, NSW, Australia
    Long time no update.

    In short, this thing hasn't changed a lot. New crank seals, new muffler, new air filter and rode it a lot, including doing a couple laps at a vinduro before having to pack up with a blown fork leg (left one, unsurprisingly).
    Wore out the top end, so that's getting done at the moment, jammed the left side fork leg solid (unsurprising, given it was stuffed to begin with) so I bought YZ125K forks and triples, which should hopefully be here next week.

    [​IMG]
    [​IMG]
    [​IMG]

    And currently:
    [​IMG]
    #15
  16. G54B

    G54B Adventurer

    Joined:
    Oct 29, 2013
    Oddometer:
    67
    Location:
    Gunningbland, NSW, Australia
    This is actually a J, if I haven't mentioned it before. 555th one off the line in late '81. Makes shit all difference in reality, but in the interests of accuracy...:D

    All the parts I was waiting for have shown up, so I can finally get moving on this.
    Finally got a chance to pick the barrel+piston kit up, old mate's been crook apparently.
    [​IMG]
    [​IMG]

    Shit, gonna need a base gasket. What have we got in terms of gasket paper... 1mm? That'll do :D
    [​IMG]

    Read somewhere that it was a good idea to leave some paper hanging out to help avoid any potential suckage issues, so I figured it can't hurt. Holes are all in the correct places, I just added half again to the outside of the thin sides.

    Pegs and extensions... NFI what to do here. I'll probably take some off the side of the stock pegs on the bench grinder and weld the extensions on so the teeth sit nice and flat just above the top of the (badly worn) stock peg teeth.
    [​IMG]

    YZ125K forks+triples. Bit dirty, and I'll need new headstock bearings if I want to use the whole shebang, but they'll clean up alright. No nicks or pits in the chrome, lower stanchions are a bit beat up but they did come off a 30y.o. motocross bike. 38mm fork tubes, so I'll probably just stick those in the bike and put up with the less-than-ideal bar position that comes with the stock IT-J upper triple until I can afford to get new bearings. Unless I can just swap upper triples... We'll see.
    [​IMG]

    Ugly stem+crusty bearings. A hit with the buff wheel and new bearings will clean this up fine.
    [​IMG]
    [​IMG]

    Fork legs.
    [​IMG]

    And the main reason I went with this front end over the IT175 forks I could have bought cheaper... Proper bar mounts! Means I can spend $30 on risers at the bike shop instead of ~$100+shipping out of the US for the ROX ones.
    [​IMG]

    Tomorrow's going to be a busy day. Should be fun :D
    #16
  17. G54B

    G54B Adventurer

    Joined:
    Oct 29, 2013
    Oddometer:
    67
    Location:
    Gunningbland, NSW, Australia
    Holy giant pictures Batman :eek1

    Eh.
    #17
  18. G54B

    G54B Adventurer

    Joined:
    Oct 29, 2013
    Oddometer:
    67
    Location:
    Gunningbland, NSW, Australia
    After reassembly:
    [​IMG]

    At the recent YamahaIT.com.au forum ride:
    [​IMG]

    Action shot:
    [​IMG]

    The bike went well after it ran itself in, pulled hard and ran clean all weekend. I'm told it sounded absolutely spot-on, so no jetting work required... Lucky break there, lol
    The YZ forks fit beautifully, they're ~40mm shorter than standard but I was running the original forks 40mm up in the clamps anyway, so I just set them flush with the top clamp. They're still a little soft, but worked much better than the originals. Didn't get much over 6", maybe a foot of air, but they never came close to bottoming, and the front end felt super solid.
    I had to drill the threads out of the L/H lower stanchion as the IT axle didn't screw through far enough, and I didn't have a YZ axle. No biggie.
    I fouled a plug while putting around running it in, and got water in the plug cap and ended up stranded in the middle of a creek, but other than that the bike ran like a clock.

    Basically just cosmetic stuff to go now, I need to replace the plastics/tank, respray the frame, and that's probably as far as this will go as far as restoration goes. It's a rider, not a shed queen.
    Need to get the shock serviced/regassed as well, and a new rear sprocket couldn't hurt.

    Anyway. TL;DR? Went to the YamahaIT.com.au forum ride over the weekend, bike ran like a Swiss watch and pulled like a train, and I'm happy with the YZ125K forks/upper triple that I'm now running.

    Cheers,
    G54B
    #18
  19. G54B

    G54B Adventurer

    Joined:
    Oct 29, 2013
    Oddometer:
    67
    Location:
    Gunningbland, NSW, Australia
    Bit of a ride report for y'all... No pictures though, some idiot forgot his camera.
    Had a brilliant day out riding the tracks in the bushland around Lakes Metcalfe and Endeavour with my brother (on his '91 XR600) and one of our mates ('00 YZ400F) on Sunday. Trails consisted of a mixture of loose gravel, rocks, sand, sandy clay loam hardpack, a dry, sandy creek bed with some rad little "hill" (bank?) climbs in it, more rocks, a few tree roots, a fucking great log that we all rode around instead of over (we did watch some mad bastard on a Husky 510 do a Graham Jarvis over it before charging off into the scrub though), a few creek crossings and one section of trail that was steep, windy and covered with hordes of fist- to head-sized goolies. Was fun, I think I'm developing a taste for more challenging stuff than just blasting around the paddocks WFO chasing roos and traumatising my sister by throwing roost at her little XL100 on the way past :D
    Bike got pretty hot, as in it was FARKING HOT and felt like it was down a little on power on the trip back to the utes from up behind Lake Endeavour, so I might go one cooler on the plug, see if that helps keep temps down a bit.
    Other than that and some issues with the forks (one of the damping rod bolts started weeping oil, and the springs are still way too soft) the bike was flawless. Ran like a Swiss watch.
    The rattle coming down in the revs is still there, I have no idea what it is but it hasn't gotten any worse, so I'm just going to change the small end bearing and not worry about it.
    Didn't get any pictures unfortunately, I'll have to remember to take the camera next time.

    In other news, some of the crazing in the tank has started to open up into hairline cracks again :baldy
    I'm sorting a replacement, but I was thinking in the meantime I might be able to go over it with a heat gun and sort of smooth the cracks over?
    No idea if it'll work, but the tank's pretty stuffed anyway, so it can't hurt.
    #19
  20. dhallilama

    dhallilama Long timer

    Joined:
    Apr 3, 2012
    Oddometer:
    1,375
    Location:
    Portland, OR, USA
    try "washing" the tank with acetone, inside & out... it slightly smooths the surface, does an OK job of taking care of hairline cracks. they'll likely come back, but this'll buy some time at least.
    #20