Wristpin clip came off while riding

[Sitticuss]

Never lost one...I have shredded a needle bearing though

[scooterpimp]

Had a clip go byebye on a sportser years back , pin carved a nice 1/8 deep groove in the front jug. Still made it home! The funny part was i told everyone i wasn't going to rebuild this one like all the others , just ride it. Then Mr Murphy payed me a visit!

[iwiketuddlz]

I'm currently using a c Clip in one side and a g clip in the other!!! I have slung a big end bearing once (lack of oil). but that's it!!!

[90GTVert]

I've had a few failures. I quit using the double ear clips altogether (like a G with an extra tab/leg) and only use G or C style clips. It seems the easier they are to install the easier they come out. The way they curve inward, the double ear clips aren't contacting the groove as much. I always leave the gap facing the piston crown or facing the crank.

[derbiman]

I was wondering why you couldn't use a regular spring steel snap ring? It seems to me that they would stay in place better than a piece of wire. Has anyone tried it?

[90GTVert]

The grooves in the piston may be rounded and most snap rings are squared off. Doesn't seem like the best scenario. If the grooves in your piston are squared then it may be an option.

[derbiman]

I never really noticed the shape of the groove, but now I am curious.

[niz76]

I do rotate mine opposite the stroke and use blue loctite- never lost one. I have seen documentation that suggests using the blue loctite when doing circlip installation.

[tsimi]

niz76

How do you apply Loctite? Directly on the clip and then install? Or after install on top of it?

[niz76]

Aug 20, 2015 20:08:57 GMT -5 tsimi said:

niz76

How do you apply Loctite? Directly on the clip and then install? Or after install on top of it?

I drip it into the groove then put the clip into it!

[spaz12]

Aug 19, 2015 13:27:54 GMT -5 iwiketuddlz said:

Darn I bend them and reuse the all the time!!! Always have and never had one come out!!! Fingers crossed huh, my engine turn very high rpm as well upwards of 15k at times!!! I also just put them in no certain way or nutin,,, I will start though!!!thanks for the tip!!!!

How do you get so lucky with that damn cylinder of yours? 

[iwiketuddlz]

Lol I have no idea dude!! Certainly no luck with this crank!!!! Ugh Ima make a vid of what I have been riding with today , and are still riding right now until I can afford to true the crank..

[iwiketuddlz]

Woot just order all my stuff to balance the crank!! Crank stand/ cooper hammer/ dial indicator with stand.!! Oh yea oh yea gona give it a shot!!! Sorry for the thread jack!!!!

[Lucass2T]

And always clip the ears off. You want a circlip you can't grab with pliers.

[Corrosion]

I have a theory on this. Some may find interesting. I put a radius on the outer dimension of the pin.
That way in theory, it will expand clip into the piston's groove. If flat it will apply side load and can pop it out of the groove.


I make sure the outside corner of the pin has a slight chamfer. I do this to keep the pin from knocking out the circlip. If it has the correct taper, at the right angle it will actually go inside the circlip and force it tighter into the piston groove.

If it is a semi-tight fit. I put the pin in a drill press and hit each end, with 600 wet or dry, with a touch of oil. I then polish with crocus cloth. the oiled pin should slide through the piston, with little more than its own weight.

This is a delicate operation. You want do this without adding excessive end play. If you don't understand the concept...Don't do it. If you get it, its a good modification for high speed operation. The chamfer runs on the inner radius of the circlip and expands it, in the groove. This method works best with true circle clips with out ears or protrusions.