Hope not, but worst case scenario is an overtightened oil screen which caused a hairline crack in block.

Lets say the period 900 SS spec is bit more real at 73 hp...

The Öhlins, although being from the 80`s just works and as good as on my MTS 1100s -07.

And its the same on 90`s Monster, SS, ST and more.

88 hp is a bit optimistic...
Mail Rudy. info@duc-only.nl to see if he has any used Öhlins. Usually around 200€, well worth the money.

Google Borescopes and inspection cameras.
Original pistons are flat.

Starter motor most probably just worn brushes, not too hard to fix. And cheap.

I had a hairline crack near oil lines to cooler on my M900.
Used a mandrel to smear together the metal to stop pressure, then thoroughly
cleaned surface and used 24 hour Araldite epoxy.
Lasted 3 years/over 20 000 kms before l got it welded up.

Here several times a week, don't always have something to add to all threads.
Appreciate builds w pics very much, thx f the effort.

Lots around, any for 900 2V fits, eBay is your friend.

Sonic cleaning and flow testing of injectors I`d do first. Take ALL electric connectors apart and clean and grease them second, what l did even l bought mine, had no problems of that kind since then. Extra check starter circuit, relay and bolt to starter. Check tank pump and electrics, change filter...

For me, Michelin Pilot Road 3 worked very well. Good grip, predictable pretty fast turn in and pretty flickable. Go with 160 for better flickability. Not so fond of the newer PR. Nowadays, on my MTS 1100s, l just love Pirelli Angel GT, seems made for this bike. Flickabe, predictable and very good gr...

Shot in the dark:
Once mine didn’t start when both bulbs in rear light was broken.
Dunno if it was a design in wiring or a gremlin.

Is there a sidestand cut out switch or a clutch switch on this bike.

No.

Not an upgrade, an alternative.
No increased performance.
The diaphragm on vacuum pumps do fail sometimes so less reliable IMHO.