Adding links to chain?

[red5]

I'm going from 38 tooth rear sprocket to 42. I have a DID 520 erv3 chain. How many links do I need to add and is there anyone in the Orlando, Fl area that can help me do this?

[GSXR RACER MIKE]

A 4 tooth change is fairly substantial, but without knowing the diameters of the sprockets, or an accurate pin to pin distance of a link, I couldn't tell you how much you need to lengthen your chain. In the past I had 2 chains just for situations like this so I could be roughly in the ball park when making a change like that.

I personally wouldn't be too fond of having more than 1 master link in a chain, but that's your call.

[loc_dogg]

It should be fine if

A. your chain is not stretched to much, this will act like a high to low spot
B. you use a rivet style master as opposed to a clip style

[Gixxerblade]

The bad thing about not lenghtrning your chain is that you will raise the angle of your swingarm changing your geometry dramatically. It would be better if you did get a longer chain to compensate and have two chains available foryour disposable. Why may I ask are you going up 4 teeth? Is the track you are going to that dramatic of a difference? You might just need to go down one tooth in the front instead of four teeth up in the rear.

[red5]

2001 Gsxr750 standard gearing is 17/42. Mine was down 1 in the front for 16/42, went to 16/38 for Daytona. Now want to go back to 16/42 for Jennings.