Yeah, not to crazy. Just a bit though ; )
Don't bother with risers. Get an actual taller stem. Pretty cheap used.
I would definitely get those pegs from ritchie petty!
Also, you need suspension! Maybe even something you won't be able to find used. But you might be able to find good used stuff and have it rebuilt for you. PM Matt at SoCal.
One tip on motor set up. With your weight a lot of guys will tell you to put a lot of compression in there, but I would steer clear. That crank already has enough load on it. I have seen a guy run pump friendly compression numbers with quite a bit of excessive timing and used AV fuel to compensate and it has worked well for them. The guy was about 320lbs