Does anyone know about how much my speedo will be off if i go 1 down and 2 up with the sprockets?
I mean is it like 5mph at 70 or like 20?

 

Probably around 10 or so. Most are 10% from the factory or there abouts......so at 60 you are doing 54. That is probably not too far off of what you are actually doing now. I havent seen a factory speedo off 10% personally, that is just what I read. I am -1 and radar verified to be 3 mph off at 70.

 

cool thanks for the info

 

I have that exact setup and at 30MPH on the speedo, I am doing 27MPH in actual speed.

 

I put the 15 and 48 thooth sprockets on but i had to bottom out the tensioner. Its adjusted all the way in and there's only about an inch freeplay.
Also now i think theres a noise from the front sprocket. I can only hear it at low speeds or when i'm coasting. So my question: is the chain too short or does it just need to wear
into place. Might be a stupid question but i just dunno.

 

A 10 percent change. If your top speed was 150, it will now be 135. Gas mileage will go down 10 percent, and rpm's will go up 10 percent. Stock, your speedo read 60 when you were actually doing 55. Now when it reads 60, you will actually be doing 50.