Featured Tiger 90 Rebuild

Discussion in 'Vintage Classics' started by Sir Clip, Feb 6, 2022.

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  1. Baza

    Baza Elite Member

    Jul 25, 2020
    2,564
    750
    Home of Amazing Grace
    If you have a smart phone there are Apps to download for it.

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  2. Baza

    Baza Elite Member

    Jul 25, 2020
    2,564
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    Home of Amazing Grace
    Puzzled at first then it dawned that the bottom barrel fin stops them coming out the other way?
     
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  3. Sir Clip

    Sir Clip Senior Member

    Jan 8, 2022
    853
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    Exeter
    That’s right, the nut was stuck on the stud and the stud unscrewed from the crankcase.
     
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  4. Baza

    Baza Elite Member

    Jul 25, 2020
    2,564
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    Home of Amazing Grace
    On my preunit Tbird I cut them off close to where they exit the timing chest and then ran them in reinforced clear plastic tubing to and from the oil tank/rocker feed. Never a problem.
     
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  5. Baza

    Baza Elite Member

    Jul 25, 2020
    2,564
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    I know you are going after originality but I would have said to hell with that and gone for SS Allen screws. Those Phillips screws were a right PITA.
     
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  6. Baza

    Baza Elite Member

    Jul 25, 2020
    2,564
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    Home of Amazing Grace
    If you have access to the Triumph Oracle Database you will see a temperature chart which shows the barrel temp on a TonTen after an hour run at less than 200º C. The Database has every parts and workshop manual you will ever want at the price of a round of drinks.
     
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  7. Sir Clip

    Sir Clip Senior Member

    Jan 8, 2022
    853
    143
    Exeter
    Yesterday i poured a pint of oil in the oil tank. This morning the floor under the bike was still dry. Surprising, I know.
    Turned over the engine on the kickstart about ten times and started to see return flow in the oil pipe to the tank (which is clear plastic).
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  8. Sir Clip

    Sir Clip Senior Member

    Jan 8, 2022
    853
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    Exeter
    Spent one hour putting the rear chain on, checking wheel alignment, tensioning the chain, tightening torque arm and adjusting the back brake.
    Spent TWO hours turning round the nut and bolt at the front of the chain guard as the chain was rubbing on it. It really is a mad fiddle to reach it.
    Need to tidy up the wires for the stop light switch and put the side panel back on.
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  9. Sir Clip

    Sir Clip Senior Member

    Jan 8, 2022
    853
    143
    Exeter
    Tensioner for the primary drive chain now on. Had to take the stator nuts off and move it out a bit to get the slipper adjuster on.
    When i took this apart it was in a bad way because the threaded rod on the adjuster had snapped. Who knows how long it had been like that, i suspect from some of the scuff marks it had been ridden while broken.
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  10. Sir Clip

    Sir Clip Senior Member

    Jan 8, 2022
    853
    143
    Exeter
    Clutch cable on and adjusted, then then clutch springs screwed down so that the outer plate rises evenly when the clutch lever is pulled in.
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  11. Sir Clip

    Sir Clip Senior Member

    Jan 8, 2022
    853
    143
    Exeter
    Outer cover on and the primary chain tensioner adjusted for half inch of free play. No tight spots in the chain.
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  12. Sir Clip

    Sir Clip Senior Member

    Jan 8, 2022
    853
    143
    Exeter
    Filled the gearbox with oil. it is an EP90 spec as i’ve heard that’s better. Two thirds of a pint brought it up to the filler level.
    Next post here from me will be in August.
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  13. darkman

    darkman Crème de la Crème

    Oct 26, 2015
    7,546
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    Southcoast of the UK Earth
    Hopefully you will be riding it by then :)
     
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  14. Sir Clip

    Sir Clip Senior Member

    Jan 8, 2022
    853
    143
    Exeter
    When the bike arrived at the workshop in January i took the spark plugs out to squirt some oil in the cylinders. One of the plugs snapped off in the head which was a bummer. Here is a pic of the remains of the plug in the head, which you can see through as the core and electrode are missing.
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  15. Sir Clip

    Sir Clip Senior Member

    Jan 8, 2022
    853
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    Exeter
    Tried heating it up with a torch, and using an easy out but without success, so started drilling it out. This pic was taken about half way through.
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  16. Sir Clip

    Sir Clip Senior Member

    Jan 8, 2022
    853
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    And finally it came out, with the plug thread intact, and after cleaning up was all good. Picture doesn’t look good for some reason.
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  17. Sir Clip

    Sir Clip Senior Member

    Jan 8, 2022
    853
    143
    Exeter
    When i follow one of my buddies on their old Brit bike the footrests are always bent and point up or down at odd angles and at different heights.
    I’ve carefully straightened the footrests and brake pedal on this bike, then sanded and painted them.
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  18. Baza

    Baza Elite Member

    Jul 25, 2020
    2,564
    750
    Home of Amazing Grace
    Yep, thats because they were generally set fairly low and with the rapid development of tyre construction and compounds in the 60s the end of the footrest was the third point of contact with road. Back in the day I did 80 laps of Lydden Hill race track and the hairpin was definitely a three point turn and the footpegs still have the chamfered end as witness.:joy:
     
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  19. Sir Clip

    Sir Clip Senior Member

    Jan 8, 2022
    853
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    Exeter
    #279 Sir Clip, Aug 4, 2022
    Last edited: Aug 5, 2022
    Page GD20 of the Triumph workshop manual, specs for valve guide inner diameter is given as 8.925 to 8.95 mm. This caused me no end of head scratching until i checked the valve guides using imperial measurements, which is given as 3.12 to 3.13 of an inch. The figure in millimetres is one mm too large!
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  20. Sir Clip

    Sir Clip Senior Member

    Jan 8, 2022
    853
    143
    Exeter
    Obvious wear on the stem of this exhaust valve, it’s 0.16mm under size. Strangely, the other three valve stems show no appreciable wear. All four valve guides are worn beyond spec.
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