on my xr100r there is a over flow fuel line thing on the bowl, and when i do wheelies it sprays fuel all over the place. Would it be ok to pinch that, or would that hurt normal riding. Will it also hurt anything when the bowl does get compleaty full? will the bike die or what?

 

Leave it open. Get a catch can if you want. When I had my 150 it also dumped gas all over the place. I simply ignored it.

 

lower your float level .....

do not pinch it off ......