Chris,
I apologize for the thread drift, but it seems your question has been answered. Can you tell us about your racing plans? Class and events you are hoping to race in this year?
I noticed you are looking for factory exhaust to convert to racing pipes, so Novice Heavyweight Production in AHRMA? I recall you trying it last year, how did it go? Early cb750f model right? Went to NJ and Barber, others?
I'm planning on doing some racing myself, so I'm curious. I'm also on the Jersey coast, not too far from you. 
George
I'm really glad to hear this... we need more CB750's at the track!
I've been meaning to start a thread on how to prep a CB750 for road racing - I figure I can share my experiences as a total novice to roadracing and what I learned along the way.
To answer your questions:
I was in the Novice Heavyweight Production class for the last two (2.5?) years and I'm planning to try my luck at the Sportsman 750 class this year. AHRMA modified the Sportsman 750 class rules (on a probationary period) to allow four cylinder bikes.
I really liked the Novice Heavyweight class, except the turn-out is so low. Last year at NJ there was only two of us in the Saturday race and I was the only one in the Sunday race. So, easy podium finishes
but it's much more fun to be dueling it out with other racers. At Grattan and Barber there were usually between 4 to 6 of us in the class.
Last year I did Grattan (no longer on the circuit this year - replaced with Gingerman), NJ Motorsports Park, NJ Motorsports Park with USCRA (on the Lightning track), and then Barber. When I raced with USCRA I believe I raced with Period II heavyweight.
This year I'm planning on doing at least Road America (never been there before), NJ with AHRMA, and Barber. I may try to do Gingerman before Road America if I can figure out how to pull off the logistics (and costs) of a weeK+ trip. I'm not sure if I'll do NJ with USCRA this year. It's a good final prep before heading down to Barber, but it's expensive for the amount of track time you get. Instead, I might do some track day weekends with Tony's Track Days up in the northeast. I really like that group and they're vintage bike friendly/tolerant.
Exhaust - my current race bike is actually my 75' CB750F street bike that's been slowly modified. I'm working on getting everything converted to a CB750K2 I have. I could run my F exhaust (stock 4-into-1 with the muffler replaced with an aftermarket megaphone), but the collector on the header scrapes on hard right hand turns/leans. I'm not excited about the aftermarket options for our bikes, so I figured I'd start with a stock 4-into-4 exhaust. I think eventually I'm going to end up with a custom 4-into-4 exhaust (possibly a CR750 reproduction/imitation)... but that's money I don't feel like spending just yet.
I'm having a blast... in fact I think it's become an addiction
You should definitely jump in. The NJ track isn't too far from you and it's a great track (Thunderbolt). That's where I took the class and did my first races (actually first time I was ever on a track). My bike was bone stock except tires, tapered bearing upgrade in the neck, Ikon shocks, and some aftermarket swingarm bushings I installed (that were actually binding a little!) Engine was never opened or worked on since it left the factory, and I pushed her pretty hard in the straights.
We're actually in a pretty good location for roadracing, and I'm surprised there's not more of us in the area doing it:
- AHRMA comes to NJ and their event's in the midwest aren't too far of a hike.
- USCRA comes to NJ as well, and their main events in Loudon are only 6 hours away for us.
- And... VRRA up in Canada isn't all that far either, in fact they're closer than Road America. I'm hoping to get up to race with them eventually. I hear their Vintage Festival at the Canadian Tire Motorsports park is pretty awesome.
Oh boy, this turned into a long response... couldn't help myself, I really caught the racing bug
Feel free to ask any questions.
- Chris
