I jst got a 76 CB 750 and i have a few questions?

[blaine22gp]

I jst purchased a custom 76 CB 750.  I need to know:

1. what is the largest tire i can put on the back and fronnt
2. I have the exposed air filters w out the box, and a kerker full exhaust.  i need to know what jet kit to put on it to get it to run correctly?

3. any other info would be helpful.

[Re-run]

OK what bike is this? cb750 in 76 was either a K or an F also called a supersport.

Either way the tires should be fine if you get a 100/90-19 front and 120/90-18(?) rear. I think the 76 had an 18 inch rear rim.

The jets are hard to say. There is no perfect size. I guess the kerker is a 4-1. I would say to start about 120 mains and maybe up 5 on the idle jets. from there, do a plug chop at various rpm and see what your plugs look like.

[CB750Winger]

  I'd agree with re-run, you just need to play with it. Mine has stock air box with 4 into 1 header. I went up 5 on the slow jets, running 115 on high speed jets and mid position on the needle jets. You may want to try that and go with 120 high speed jets.