running problem

Kenny_McCormic · Post by **Kenny_McCormic** » Wed Feb 25, 2009 4:10 pm

Heli coils work fine, 6mm is the size. If they are OK to fix jumbo jets and M4s I think they will hold the carb on a scooter just fine.

Wheelman-111 · Post by **Wheelman-111** » Wed Feb 25, 2009 4:20 pm

Greetings:

Agreed that Heli-Coils are strong and reliable. However I've found that in applications where frequent disassembly/assembly is required, they sometimes loosen and spin out of their threads. I used them a lot in composite windsurfing fins, which get changed out almost every session. I often had to replace them. This is what happened on my carb, too.

I would add that bonding them in with JB Quik or JB Weld would help them last indefinitely. Just don't get any wet stuff on the bolt threads...

Clivester · Post by **Clivester** » Wed Feb 25, 2009 9:35 pm

I agree that they can come loose - especially in soft aluminum. I just tried some fatter self-tapping insets from a guy on eBay - he has 5mm and 6mm. They work great. Apparently they are made in Germany and the eBay guy is in Isreal! What a connected world we are.

mgracer · Post by **mgracer** » Tue Mar 03, 2009 11:12 am

Well the scooter is fixed for now. I ordered a new by-starter and received it yesterday. Pluged it in this morning and she fired right up and idled smoothly.
Thanks for all your input.
As for freze plugs: I've got two held in with blotcks and bolts. I think in the next rebuild I will drill and tap on either side of the two not otherwise secure.