Welcome to Netrider ... Connecting Riders!

Interested in talking motorbikes with a terrific community of riders?
Signup (it's quick and free) to join the discussions and access the full suite of tools and information that Netrider has to offer.

Time to rebuild the 900F

Discussion in 'Modifications and Projects' at netrider.net.au started by bikeboy, Apr 12, 2014.

  1. Well, I've de-commissioned the Super Bol D'or, because apparently my body doesn't 'appreciate' the riding position. Luckily for me, that means I have a whole host of goodies again at my disposal ;-) I also have a stockpile of 1100 parts that I'd planned to fit as an upgrade - mainly a front-end and swingarm.

    In order to take advantage of the situation, I thought it was about time I went back and re-visited my original CB900FA, as it's been a few years now since the restoration and she's looking a bit tired.

    I've recently bought a conversion kit from one of the guys over at CB1100.net, and have started fitting it. I've also fitted the 1100 swingarm, and 1100 forks, because the original 35mm units look tiny. While I had a spare set of forks already, I didn't have any 39mm clip-ons, so I pilfered a pair from my (also) spare VF750F bike. They seem to have a slightly higher rise, so I'll see what difference that makes when I can ride it. Already pushed a 900 steering stem into them, and fitted a new bearing. I've also got a pair of VF1000R calipers to install. For reasons that escape me at the moment, I painted the calipers gold after I'd rebuilt them. I'll have to go back and paint them black before I fit them.

    VF1000R-calipers.

    Front is a straight-forward swap, with a little machining required to clearance the caliper hangers, which the guy is working on for me at the moment.

    CB900F-F2-caliperHanger.

    Rebuilt the TRAC units, and waiting on some rubbers and circlips from DSS.



    cb900F-F2wheel-front.

    Back is a little more involved, but clearly explained. I've still got to get a new bearing for the VF500 sprocket carrier, and a 520 rear sprocket, but all indications are that's all I need now.

    CB900F-F2-rearWheel.

    The brake-stay is a piece of art in itself :D

    CB900F-F2-rearWheel01.

    Nothing ground-breaking I know, but the old girl is due for a refresh, and this seemed like a logical step.

    cheers
    ian
     
     Top
    • Like Like x 2
  2. Best bet is to part it out.
     
     Top
  3. Won't happen. I have a pathological aversion to 'letting go' of stuff. Hence all the spare parts I have at my disposal. Heck I even bought a another complete VF750 because I needed a replacement spark unit for my runner ;-)

    ian
     
     Top
    • Like Like x 2
  4. Fascinating project, and I love your crisp photographs
     
     Top
    • Like Like x 1
  5. Excellent - another Bikeboy build with plenty of photos.
     
     Top
  6. Waiting for some machining to spacers and caliper hangers, so decided to paint up the motor. It was rebuilt not long ago, so there's no internal work to be done.

    allBlack.

    Used some VHT gloss black engine enamel. Put it on the vf750 and it's holding up really well. I powdercoated a set of covers satin black years ago but never used them. They're a perfect match for the paint, but I didn't do an alternator cover. Will do that as well at some point.
     
     Top
    • Like Like x 1
  7. Please stop with all the rebuilds. My missus has discovered the stash and bike lift and is now asking about "her" bike (the VTR which is somehow got stripped for rust removal and rebuilding). She discovered that I had been bidding on some older bikes for projects.

    With all of the inspiration I'm not sure I can stop and for domestic harmony I need to (with alimony I can't afford a place with a decent shed so I have to keep her happy).
     
     Top
    • Like Like x 1
  8. It seems my new motor may be ready in time to install in this version after all. I've bought a big bore kit to take it to 985, and had the barrels machined to suit.

    machining.
    I've just about rebuilt a spare head bar for a couple of missing shims.
    head.

    Then I get to open the spare crankcase and inspect the bearings.
    blackCases.

    What a dilema ;-)
     
     Top
    • Like Like x 2
  9. Got the caliper hangers back from being machined, and everything fits nicely now.

    frontDone.

    Had to get some smaller discs because the ones I had were too large. No big deal.

    cheers
     
     Top
    • Like Like x 1
  10. Got the cases split, and no big surprises. As I suspected, I'll have to get new shells, but other than that it's good to go after a good clean.

    cb900f-lowerBearings.
     
     Top
    • Like Like x 1
  11. Got some motor goodies rolling in now.

    Vince and Hyde Racing in NZ produce an upgrade to the stock A cam chain tensioner and guide, as well as race-spec A and B cam chains

    tensioners.
    new version on left, improved 1100 version middle, and 900 version right.

    guides-chains.

    ...and of course the big-bore pistons:
    pistons.

    Still waiting for the modified oil pick-up that increases the volume of oil to the oil pump, and the new bearing shells.

    cheers
    ian
     
     Top
    • Like Like x 2
  12. A guy in the Netherlands produces new rubber dampers (NLA) for the clutch, which in older units is the cause of the characteristic 'clutch rattle at idle' condition. Installation is fairly easy once the rivets are drilled out.
    dampers.
    clutchDrive.

    The current best-practice recommends bead blasting the metal plates to improve grip, and replacing the riveted plate with an extra plain metal one.
    clutchPlates.

    Another modification is to bronze weld closed this oil feed hole in the clutch pusher.
    clutchPusher.

    While I have access, there's also a modification to the shifter rod the prevents a missed-shift-into-second-gear condition that happens sometimes on these transmissions.
    shifterMod+.

    ...and my new bearing shells from Honda turned up (ouch :-O)

    bearings.

    ian
     
     Top
    • Like Like x 3
  13. New oil pickup has now arrived as well:
    pickUp.
     
     Top
    • Like Like x 1
  14. Never get sick of unwrapping fresh powdercoated parts
    powder1.
    powder2.
    powder3.
     
     Top
    • Like Like x 1
  15. Not everything went according to plan however. Despite taping up and protecting all the threads and bearing surfaces, the sand blasting got into the lower steering bearing race. I was hoping to be able to re-use it. The Bearings are fairly new, and the outer race is a PITA to remove. Turns out I had to do it any way :-( Luckily I had a spare set ready to go.

    blasted.
     
     Top
  16. So...bearing sorted its time to start rebuilding this thing.

    Using the tried and true drop-frame-over-engine method stage 1 is completed:
    stage1.

    On to the rear, and the swingarm is fitted, and rear wheel installed:
    stage2.

    Then the front end is re-connected:
    stage3.

    Then it was time to stop for the day, because I was a little distracted by the purchase of this little gem. Had to organise a courier able to bring it on home;-)
    1100rd-01.

    I made a promise to myself to finish off the 986 before I get too carried away with the new toy. Otherwise it will spend the rest of its days on the lift :-/

    cheers
    ian
     
     Top
    • Like Like x 4
  17. Very very nice - lucky lucky boy
    Looks awesome Ian
     
     Top
  18. Just what every freshly powdercoated frame needs: a new compliance plate.

    compliance1.
    compliance2.
     
     Top
    • Like Like x 2
  19. Damn eBay. Managed to snag these while no-one was watching apparently:

    tarozzi.
     
     Top
    • Like Like x 2
  20. The Marzocchi Strada rebuild kit arrived so I, ah, rebuilt the shocks

    rearShock.
     
     Top