Featured Tiger 90 Rebuild

That’s right, the nut was stuck on the stud and the stud unscrewed from the crankcase.

 

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).

 

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.

 

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.

 

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.

 

Outer cover on and the primary chain tensioner adjusted for half inch of free play. No tight spots in the chain.

 

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.

 

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.

 

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.

 

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.

 

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.

 

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!

 

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.