Zeda 100 "Max"

[mirman]

If I have to drill and tap it why don't I just drill and tap to the next bigger size? Why use a helicoil if I can just tap it one both sides bigger?

One size bigger

 

[DAMIEN1307]

Pretty straight forward.

3 options
1. Helicoil.
2. Tap for a 1/4-20 bolt.
3. Drill and tap for an M8 bolt.

If I have to drill and tap it why don't I just drill and tap to the next bigger size? Why use a helicoil if I can just tap it one both sides bigger?

I think Rocket has already pointed that out as one of three options already...lol.

 

[GW's Motorized]

I think Rocket has already pointed that out as one of three options already...lol.

Yup, I never said you had to use helicoil. If you drill and tap to a larger size you will also have to drill the exhaust flange and get a new bolt. Heli coil will keep you from needing to drill the flange and getting a larger bolt

 

[ImpulseRocket]

Helicoil - keep same bolt as stock.

That's the advantage.

If you have no problem going a size bigger, and only have metric taps. Go to an M8. M8 is the most common exhaust bolt/stud size on most engines.

If it helps you decide, I would go for an M8 myself. Ideally it should be drilled to a 29/64 before tapping.

 

[mirman]

Yup, I never said you had to use helicoil. If you drill and tap to a larger size you will also have to drill the exhaust flange and get a new bolt. Heli coil will keep you from needing to drill the flange and getting a larger bolt

I will get a larger bolt

 

[mirman]

You need to drill and tap, then insert it. I've never done it, but I have seen it done. Impulserocket has done it many times though

 

[mirman]

Helicoil - keep same bolt as stock.

That's the advantage.

If you have no problem going a size bigger, and only have metric taps. Go to an M8. M8 is the most common exhaust bolt/stud size on most engines.

If it helps you decide, I would go for an M8 myself. Ideally it should be drilled to a 29/64 before tapping.

I already have this

 

[GW's Motorized]

Is that the Harbor freight set? They work OK, you have to work slow with them

 

[ImpulseRocket]

I already have this

Then you just need the appropriate drill bit.

 

[Nickt919]

I have a HF metric set like this. Not too bad… decent for our occasional use.
It’s cleaned up a lot threads for me.