Welcome! I to will soon purchase a GRiSO. Plan on keeping it almost stock. Lowered pegs, handle bar risers. That's about it and certainly you want to checkout this... [You must be registered and logged in to see this link.]
Here is some of what I have gleaned from this site;
- Engine oil: Stick to 10W60 fully synthetic, e.g. Motul 7100, and keep level between the lines. Try 3 liters to begin with.
- Oil temp: the GRiSO is overcooled and struggles in winter to get above 80C. An RR dipstick thermometer and oil cooler cover is worth trying.
- Gearbox and diff oil: Redline Shockproof Heavy works really well, but needs changing every now and then (5-10000 km).
- Suspension settings: sag (37 mm front, 33 mm rear, reduce factory compression and damping and perhaps raise the fork legs to 5th or 6th line
- Mapping: early bikes were rough but newer behave better as long as they are set up properly (not always the case) and keep the stock airbox and exhaust. Not perfect, however. All run the MM 5AM ECU. Lots of good aftermarket maps for open air and exhausts.
- Technical issues: few, if any, after replacing flat tappets with rollers. Plastic fuel tank swelling seems not to be an issue as for Ducati and KTM (different material, anyone knows?). Make sure to grease the rear splines, swingarm and linkage bearings as they may come close to dry from Mandello.
- Owners: Seems to be a great bunch. What's more, people really seem to fall in love with their bikes, even when plagued by niggles.
- Make sure before delivery that swing arm bearings are properly greased as well as carc splines.
If anyone elses sees something I have failed to mention by all means hop in... BK