klx650sm2002 wrote on 12/31/69 at 16:00:08:Hey Lancer
Is the 1.75"header an i.d. or an o.d..
KLX has a 1.75 o.d. 1 5/8" i.d.
2x37mm inlet valves and 2x32 exhaust valves.
Any bigger carb (FCR41) or pipe would require some serious port work.
Clive W
I am using the 1 3/4" OD // 1 5/8" ID pipe. The 1 3/4"OD header will be 30" long, with a 2-3" adapter piece to fit with the 2" ID of the Supertrapp, which has 12" of the 2" ID pipe, and then the megaphone portion which is 15 1/2" long and is 2 1/2" OD to 4" OD on each end. That gives me a total of 58-60" of exhaust system. This Supertrapp has 8 discs to work with. It is virtually identical to the other megaphones I put up for sale, except that it is slightly smaller overall.
It is possible that I may shorten the 1 3/4" header or the 2" pipe on the muffler to get it to fit...probably the 2"...I would rather cut that area than the header.
The intake port on the Savage engine is 43mm ID. I have read/heard that it is best to match that ID with the ID of the carb to be put on it. A 43mm carb on the Savage seems a bit of an overkill, so what I am considering doing is to take a 40mm Edelbrock carb and machine the ID to match the 43mm ID of the engine. This should help to provide a smooth intake track for the fuel/air mixture.
It is kind of hard to get stuff done now with having to care for my wife after the surgury, but she is doing well considering how badly she was hurt.
In a couple of days I will try to start the fabrication....besides, I have some new toys...a new mig welder and diamond blade saw for cutting metal and tile. It would just be WRONG to let those sit too long without useing them.
It will look something like this.