Ummm .. removing the air box teaches nothing too.
By removing the outer plastics, fuel tank you get access to most things. And at a starting level this is what is required. Going on to strip the swing arm, front forks .. well yes it will teach something .. but as a beginer it also has a high risk of something going wrong. And that risk is not one I'd recomend someone taking unless I had physical contact .. over the net .. no way. I think henryuk you need to define your limits for the advice ....

If something does go wrong then that unit is already faulty .. so a repair is already required. Makeing a mistake and adding anothr rpice to thr repair is not as bad as making a repiar necessary on what was a good unit.

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turn2travel

Ware items to look for
brake pads
chain and sprokets
chain sliders - ther are two sliders - aroun=d teh swing arm and anotehr just before the bottom of the rear sproket.
Chain rollers - 2 of these too.
Spark plugs
Air filter - yes it does ware out.

Fork seals (errrr have you changed teh fork oil - often overlooked!)
Countershaft seal
Rear shock - get it serviced and see what they say .. Note Suzuki will say it is a seald unit .. take it to a shock rebuilder and have them look at it.
Bearings - Wheel, swing arm, steering head .. and those rear shock linage bearings ..

That should be a good start....

Give the bike a wash when you have the outer plastics off - shield the air box inlet/s, inginton box, coil the rest should be ok. Look for loose bolts, damaged stuff as you wash.

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Regards Frank Warner
motorcycles BMW R80 G/S 1981, BMW K11LT 1993, BMW K75 G/S