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Clean your motor, remove valve cover and gasket, clean them and the head surface
I'll assume that Gen 1 and Gen 2 valve covers are pretty much the same
What you're trying to do is level the gasket/cover to the head
I use orange RTV silicone, Ed likes 3 Bond products
Put a small bead of sealant in the groove in the valve cover, more on the exhaust side, very lightly press the gasket into the groove
Mount the cover, gently tighten the bolts
After it sets, remove the cover and trim any extra on the inside, I use an Olfa knife it's a snap blade
While the cover is off, make sure your sparkplug wrench will fit past the gaskets, if not, trim it with the Olfa knife
If your 1090 is Euro3 it probably has reed valves on the valve cover.....epoxy plugs in the holes
Put a light coat of sealant on the head mating surface, mount valve cover
I put RTV silicone on the O-rings on the 8 cover bolts
If the Gen 2 have a crankcase breather like a Gen 1, remove the breather and epoxy coarse (1/8" holes) screen
over the hole in the bottom......fill the void with Chore Boy pot scrubbers.....put the cover back on...now, no oil in air box
Get a Gen1 cush drive or aftermarket one, Gen 2 cush drives are POS.....and trash the rear end ....want pictures?
Back your hub pinch bolt torque off to 15lbft/20Nm
Remove the side stand and make a jumper for the plug
Sell the stock cans and use an Arrow Thunder, you won't believe how much weight you'll save:grin2:
Get frame and axle sliders
Ditch the stock gas cap/key arrangement, remove the stock gasket between the cap and tank and plug the hole where it was mounted......you're now venting to atmosphere, through the cap :grin2:
Use a Baxley wheel chock at the track, but bring a one sided rear stand and a screw jack and some blocks, so you can change both tires
Olfa knife:grin2: