Castwheel rear sprocket holder repairable with helicoils?

Beucars

Beucars

Hero member
Location
Central Europe
I was horrified to find out that the four bolts of the rear sprocket holder came loose on my 1000 SFC and threads are worn-out.

Any experience and advice much appriciated.

Jeroen
 
You may also use Ensat www.kerbkonus.de if there is sufficient material around the drilling.
No special tool is necessary you can use a screw and a nut to cut it in.
Andre
 
There are also Timeserts which are thought to be a superior product.  A machine shop can do this for you if you are uncertain about doing it yourself. Definitely want to make sure you end up with a smooth parallel surface especially look for raised metal around the old holes.
 
It really all depends on how shagged the threads/bores are.

Both Timeserts and Helicoils require a close-to-nominal dimension to work and fit well.  If the bores clean up well with the dedicated tap for these repair systems, both will be OK, with the Timeserts being my favourite.

Then there is the "Bigsert", intended for threads/bores that have REALLY been fucked up... these are practically a whole size larger on the OD.

piet
 
sfcpiet said:
Then there is the "Bigsert", intended for threads/bores that have REALLY been fucked up... 
Click to expand...

Yeah, know how that one goes  :( ... (Result of failure of previously inserted - NOT by me! - Helicoil  >:()

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I'd go with time sert repair if I was you for that area. As Piet says there are always Big serts for where helicoils have failed.  In that area I would be leaning towards a time sert as will carry the drive load better I believe.

It would be way better to  get the job done by a pro.... do the job once with a time-sert. Whereas with a helicoil esp if the uninitiated is using well you can be asking for a whole lot of pain seen way to many stuffed up, luckily then they make a big sert to fix the issue.

 
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