stripped thread.... inserts ?

[drifter]

I took off the cover that has the clutch cable going into it
and found that one of the bolt holes was striped

its part #10 on the crank case cover scheme

http://www.bikebandit.com/houseofmotorcycles/1980-yamaha-xs400sg-crankcase-cover/o/m8261sch214771


not sure of the size to get the right timesert kit
http://www.timesert.com/html/mtrcsert.html

 

[xschris]

I would not worry to much about that side. There is no oil or seal to keep in with the adjustment cover as long as the others are fine you should be ok. You could try using some plumbers tape to wrap the screw threads just to get it snug, or drill and tap some new threads

 

[drifter]

i am not really worried about it ... but i just want to have everthing in its place ... I would like to do a full restoration.. might just get this stuff http://www.permatex.com/products/Au...ad_repair/Permatex_Stripped_Thread_Repair.htm

i prefer to fix it right the first time is all

 

[OleDoc]

could use a heli coil if you had to

 

[drifter]

could use a heli coil if you had to

which brings me to my first question what size is that bolt ? what size thread M?

 

[drifter]

just looked at some info on metric threads... seems there is less things the standard threads
no pitch to worry about
based on diameter
and its fine or coarse

in this case its fine thread?

so i just need to measure the bolt diameter?

http://www.carbidedepot.com/formulas-tap-metric.htm
http://en.wikipedia.org/wiki/ISO_metric_screw_thread

 

[drewpy]

M6, I did a helicoil on that side too.

the clutch needs that bolt in or the cover may flex causing it to have less clutch action

 

[Shaun Chandler]

Hey Drifter you still have a pitch its just not measured over an inch like in standarc or inch threads.

You could do it a couple ways. Helicoil (might depend on how much meat you have as you will be drilling it up in size first then tapping and inserting the heli coil) You could just go up a size ( I wouldn't its best to keep things the same)

You just measure the bolt dia. so if it comes out to say 3.87 mm thats a 4 mm diameter. Then use a pitch gauge (metric) to see what the thread is (center to center distance of the threads).

If you have ever bought a tap and die set you likely got a pitch gauge with it. I'll attach a picture below. I would measure mine and tell you but I'm not sure what box they are in as I've been doing renovations.

 

[domains]

Bring a bolt with you to get a heli coil to match it. if you have enough material to place one.

or just clean hole.. jb-weld.. when it sets tighten it just a bit.

 

[drewpy]

with a helicoil you get a kit.

It has the correct drill bit, a special sized tap and a few inserts along with the insert ket and a bar to tap out the tang.

its really easy to do

 

[drifter]

same with timeserts you get a kit
no tang to break off
solid not a coiled wire

price seems to be about the same
i stand corected
helicoil atleast on amazon seems cheaper