So diving back into my 550 to 750 stroker motor.
Right now it is bored for 65mm and I have some wiesco 12:1 750 pistons, 650 crank and topend.
Intake: modeling up a flanged adapter to have my brother mill out (he has a mini HAAS machining center in his basement) to weld over the stock spigots to adapt to GSXR 600 intakes to match the throttle bodies. They have the same height as the stock 650 port but are oval in shape. The plan is to use this with some weld build up to straighten out ports (1 & 4) and match spacing better.
Alternator:
In process of having a sleeve cut to adapt a VFR flywheel and stator to 650 crank/500 cover
Oiling:
If my guy can get in there I am shaving down the oilpump pad by about 2mm and same to the shaft boss on the pump so I can squeeze the 650 pump under a 550 countershaft cover. I have a 650 DOHC oil cooler setup. I had the boss on the 550 milled down to accept it and grabbed an adapter from another kit that I will have the sandwich plate trimmed for. I broke down the 650's lines to build my own (I have benders and flaring tools for SS hardlines) 650 head has been machined for banjo bolts on each side to get fed externally. Will it need restricted still? how big an orifice?
Exhaust: Solved?
Will a 1.5" primary header be too big? What size collector? Looking to do a 4-2-1 to clear the deeper 650 oilpan. I will have a "sleeve" and flanges cut for head ports. Open to suggestions on a muffler. overall trying to keep the bike looking more period like (wire wheels, OE dual discs, OE lights) but maybe a more modern stubby type muffler wouldn't look too bad? I ended up ordering a Hindle exhaust through Ripple Rock Racers. I ran the numbers for buying all the SS bends, joints, having flanges cut etc. and it wasn't much more cost wise to go with their header/muffler.
Camshaft:
I have a couple 550 cores to get ground. I am going EFI so need to keep a decent vacuum signal. But being I will be 200cc over stock should I even look at off the shelf grinds or go bigger? will swapping rockers around to flip the leading edge get me away from having some refurbed?
Valvetrain:
I would like to do oversize valves (how big?)....so looks like they will need to be custom (since they are longer than a 550 valve). The 650 head uses a taller installed spring height. Shim them up or adjust keeper groove lower on stem?
Gaskets:
Will be doing custom Cometic gaskets. With a Viton steel base gasket will I still need liner o-rings? (head is being external fed) I know I need .060" of gasket stack to keep the piston out of the head/chamber as is before any additional machining to pistons/chamber (I would like to open up chamber to match the 65mm bore)
Primary drive is being switched to the 650 ratio. I should have no problem making more power/torque to overcome it. I would rather have a wider gear spacing on the bike (I am running 17" hoops on the wheels so with the shorter tire I already have a shorter final drive ratio) other than that it is going to be a stock 550 trans. Clutch upgrades needed? preferred friction discs and springs?
Breather:
I would love to have some sort of means to keep a vacuum on the crankcase but not sure I want a true PCV system to foul my combustion. should I just plan on a breather tank and keep it simple?
Looking to reel in some design parameters to start making plans for parts and getting orders in
