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Posted: Wed Feb 25, 2009 4:10 pm
by Kenny_McCormic
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.
Heli-Coils
Posted: Wed Feb 25, 2009 4:20 pm
by Wheelman-111
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...
Posted: Wed Feb 25, 2009 9:35 pm
by Clivester
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.
Posted: Tue Mar 03, 2009 11:12 am
by mgracer
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.