boring a throttle body
Super Moderator
Joined: May 2001
Posts: 11,851
Likes: 2
From: Rancho Palos Verdes, CA
Vehicle: 2008 Toyota Prius 2006 Suzuki SV650S
You have to bore it out 100% centered, then you have to custom fabricate a new larger butterfly that is within .25mm of the bore job. You can only take the stock unit to 58mm. If it is more than .5mm offcenter, you will rupture the TB walls.
The easy way is to send it to Onpol.
The easy way is to send it to Onpol.