What size hole?

[Steve 0080]

I used a step bit and did one notch at a time...sorry

[TerryB]

The hole size is 30mm.

Here are the instructions on Honda's website.

http://powersports.honda.com/documen...70-MJG-670.pdf

[Ray H]

If you don't have access to a 30mm bit, I've heard a 1 1/4" will also get the job done. I also have an OEM kit sitting in the garage just waiting for daytime temps to drop below 110 degrees. Got a few things left to install but not in this heat.

[Fla_rider]

I just did it, it was 1 and 1/8 inch.

[Hornblower]

1 1/8" = 28.575mm so, if the correct size is 30mm, that might just do the trick. For cutting smooth holes and especially larger holes, I much prefer using step drills. You can get a set for cheap at Harbor Freight. The only thing you have to watch out for with those is going a step too far and winding up with a larger hole than intended. No reason to run into that issue as long as you're paying attention.

[darcym]

note that the hole for the aftermarket part (not the HONDA one) is smaller, only 7/8"
I used a spade bit.

[DaWadd]

I used a Bosch 1 1/8" spade bit and it was hairy out of control because of the threaded tip. Don't use that type. If I was to do it again I would use a hole saw or step bit. Much easier to control.