SOHC.co.uk Forums > CB500/550
Stripped bowl threads on carbs Helicoil guidance needed.
robvangulik:
I Helicoiled all my floatbowl threads 2 weeks ago, because three had gone bad loosening the bowls.
I ordered a set from Amazon, cost me 7 euro INCLUDING postage, took 3 days to get here and then spent less than an hour on a rainy sunday afternoon to put them in. The set was complete with all the tools I needed, drill, allen key, thread turner inner ;) and 24 coils, so enough spare to make mistakes (which I didn't).
Scooter:
I have used a helicoil kit for 8-32 screws, repairing 7 of the 12 screw holes on my 77 550k. Also repaired a couple of holes on the S&S superleaker (Super E) on my harley. The kit had everything execpt the required drill bit to ready the hole for tapping. I believe it was an 11/64 inch drill required (apologies to metric folks). Only problem i had was breaking the tang in blind holes. Repairs seem to be holding.
McCabe-Thiele (Ted):
I have ended up cutting the tip off my existing Helicoil Tap with my Dremil type tool so it's now flat ended - it still has the tapered lead at the end so should be fine. I bought an M5 kit a while ago that came with plenty of coils.
I'm planning on doing a practice thread first on some scrap alloy that my brother has when I see him on Friday.
McCabe-Thiele (Ted):
--- Quote from: Matt_Harrington on July 08, 2024, 11:32:09 AM ---Ted, I replaced about half of the threads on my spare 400/4 carbs with helicoils. I use Loctite 648 when inserting then trim off any helicoil AFTER it has cured with the ol' dremel.
--- End quote ---
Okay Matt, I have tapped out the two dodgy carb bowl threads so next I need to fit the coil inserts.
It was harder than I imagined to keep the Tap at 90 deg to the carb body - I now have some new threads.
I like the idea of giving the coil insert some extra intergrity using Loctite or similar.
With the Loctite 648 - is there any danger that the Loctite will seep through the coils and cause an issue?
Matt_Harrington:
Ted, I don't think so. I would just let the Loctite cure.....
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version