Installing Shift Light

[wilks]

Anyone know if I can drill into the speedometer housing to mount the bracket with a very short screw without jacking things up inside?

I’d be drilling just behind the chrome bezel where the cup starts.

 

[wilks]

Well I said damn the torpedoes full speed ahead (after speaking with Sean for advice) I drilled a tiny hole in the speedo cover (it is plastic) after looking at some break down pics on eBay and mounted the sucker.

 

[kerr8005]

I used a self tapper screw worked great

 

[CUDAPARKER]

Anyone know if I can drill into the speedometer housing to mount the bracket with a very short screw without jacking things up inside?

I’d be drilling just behind the chrome bezel where the cup starts.

which shift light did you use? And how do you like it?

 

[wilks]

Used thee guys.

https://www.raptorperformance.com/

works great and easy install

 

[CUDAPARKER]

Used thee guys.

https://www.raptorperformance.com/

works great and easy install

Thank you!

 

[Fire-medic]

That looks like a good application for a nut-sert that mounts like a pop rivet

 

[wilks]

That looks like a good application for a nut-sert that mounts like a pop rivet

I’d be hesitant of putting something that big in that cup.

 

[MileHayabusa]

I’d be hesitant of putting something that big in that cup.

You can get Nut-serts in all sizes...I've seen them down to 2 and 3mm sizes.

 

[Fire-medic]

Using a self-tapping screw in a plastic speedo housing I'd liken to attempting to drill a hole in an eggshell. If it worked for now, good for you. I'm no machinist, but self-tapping screws usually have a coarse pitch, not conducive to staying torqued tight over time in a thin material where there is probably only one 360 degree of screw thread in the material, and the assembly is subjected to the force of airflow and low-amplitude, high-frequency vibration from the motorcycle engine.

How about using some JB Weld to epoxy a threaded nut to the inside of the speedo housing? That way, the speedo housing would only be used as a 'sandwich-filling' between the head of a small machine screw and the epoxied machine screw nut. Radio Shack would have had all-sorts of different sizes of small machine screws and nuts. Cut the threaded length to what you need to 'capture' the nut. Maybe scratch-up the area where the JB Weld would be placed, to give the smooth die-cast plastic some 'tooth' to better adhere, and to hold the nut more-securely.

Here's my astro nut-sert tool, for larger fasteners. I have another one, I think it's an Arrow, for much-smaller nut-serts, the gun is sized like a pop-rivet tool.

 

[Tsal357]

I attach bracket to the speedo with gorilla double sided tape. Been there 2 years so far to issues.