physicistkev
Control Rider
From a structural perspective, there is only so much that tab and then the whole Assembly can handle.
Like BigKaley says, you will weaken the tab by making the hole bigger.
That being said, that tab is only so strong. If you are concerned about snapping bolts, replace the bolt in the frame slider with a stronger one. But, realize that you will put more force on the tab by doing this.
If you have scrapped threads, I would suggest that you run the proper tap 6mmx1.0 or whatever the correct ORIGINAL size is and then use a nut on the back of the tab to actually hold the bolt. This will not weaken the tab in any way and you can still use the original pieces.
Something to think about here is what the frame slider was meant to do. tittys04 (whats up Eric) is correct in that its not really meant to do anything but protect bodywork. However there are some setups that will support more weight and will protect more. This varies by bike. Beyond that the slider was meant to "slide" on pavement. Not standup to the bike crossing curbs or from track to dirt transitions. That will rip clipons and foot pegs off, there is no way a 6mm or even an 8mm bolt will withstand that type of shearing force (lateral force applied perpendicular to the bolt).
So, the moral is, make sure what the system will actually withstand and then make modifications so that all parts perform at a similar level within that system. Realize that the system will only work for its intended purpose and to its engineered levels. Don't over engineer one part thinking that it will improve the overall system as it will not.
Kevin
Like BigKaley says, you will weaken the tab by making the hole bigger.
That being said, that tab is only so strong. If you are concerned about snapping bolts, replace the bolt in the frame slider with a stronger one. But, realize that you will put more force on the tab by doing this.
If you have scrapped threads, I would suggest that you run the proper tap 6mmx1.0 or whatever the correct ORIGINAL size is and then use a nut on the back of the tab to actually hold the bolt. This will not weaken the tab in any way and you can still use the original pieces.
Something to think about here is what the frame slider was meant to do. tittys04 (whats up Eric) is correct in that its not really meant to do anything but protect bodywork. However there are some setups that will support more weight and will protect more. This varies by bike. Beyond that the slider was meant to "slide" on pavement. Not standup to the bike crossing curbs or from track to dirt transitions. That will rip clipons and foot pegs off, there is no way a 6mm or even an 8mm bolt will withstand that type of shearing force (lateral force applied perpendicular to the bolt).
So, the moral is, make sure what the system will actually withstand and then make modifications so that all parts perform at a similar level within that system. Realize that the system will only work for its intended purpose and to its engineered levels. Don't over engineer one part thinking that it will improve the overall system as it will not.
Kevin