18 tooth front sprocket

[GregT]

I would like to switch to a 18 tooth front sprocket. I've seen online where one has too remove the shifter safety? What is it? and what does it do?

 

[Scorpio1963]

The only thing you should have to remove is the side cover behind the altenator and the nut that holds the sprocket on.

 

[xschris]

Going to a 17 is the most for a sohc xs400. Drop the rear more ( 39-37 or 37-35) if you want even lower rpm's but remember you will lose pulling power with the taller gears.

 

[MrStubb]

I'm going to install a 17t front sprocket on mine. About how much should I expect to loose in RPM? I'm not really looking for more top speed just to cut some of the buzz when I'm at speed.

 

[xschris]

Going up one on the front will drop you about 500 rpm's the same as going down two on the rear.

 

[GregT]

okay thanks