Vave Shim Tool - Motion Pro

The Motion Pro Valve Shim tool MP 08-0020 I feel was a hard tool to work with.... I would imagine the original Yamaha tool had better specs....I was able to remove 6 of 8 shims to obtain #'s........

It was easier to clamp it down with vise grips rather than use the allen wrench bolt....

My problem on the other two is that the valvecover bolt holes are cross threaded or stripped out........time for tap & die set I guess.....otherwise a I will have oil spitting out at some point.....

Any suggestions for stripped out bolt holes........helicoil maybe ?????

Thanks in advance

 

helicoil is about all you can do. if you want a professional job. otherwise i've used bigger bolts or some type of bolt that will screw in and do the job.

 

I've used 'staked threaded inserts' to repair these thread bores - I'm not a big fan of helicoils. The staked inserts require a larger drill and tap size, so watch your wall thickness. The upside with these is that you'll have a steel threaded bore to bolt into, instead of the original aluminum, and the 'stakes' keep the insert from rotating out, like helicoils occasionally do. You can find them by web search, or by cotacting your local nut/bolt/fastener supply house. Staked inserts are used quite a bit in gas turbine/aerospace industries, and provide excellent holding power in aluminum and magnesium housings.

 

Can't help you much on fixing the threads on your bike but I can say I've used the Yamaha tool for removing valve shims and the zip tie method; I'll not go back to the Yamaha tool. The zip tie worked like a charm and was imo quicker and easier than the tool.

http://xjbikes.com/Forums/viewtopic/t=1 ... art=0.html

 

I've used the valve tool with no problems at all. But I'm a believer in using any tool that was made for the task. Seen too many injuries and broken parts by people who cheap out on the proper tool. I don't have money to waste so I'd rather buy the right tool the first time then have to buy a new part AND then buy the right tool. Cheaper and safer.

 

Zip tie method everytime.

 

Some of the valve cover holes are open ended and will allow a longer bolt of the same thread to work. See if you can't take this inexpensive route. If not, I happen to have staked inserts and the tool to install them (had to take this route myself last year).