Is this bolt normal or reverse thread

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Brandon H.

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Mar 26, 2009

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• Nov 14, 2009

• #1

I have a 1989 Honda CR125, and I am in the process of tearing down the bottom end. I am now on the gear that goes on the end of the crank (clutch side). Its a 14mm bolt, and I am trying to get it off but for the life of me it wont. I am using a impact wrench at 125psi (max setting), and still it wont come off.

On my 2 other bikes, its a normal thread, and would spin counter-clockwise to take it off. Is this bolt any different???

 

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Brandon H.

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Mar 26, 2009

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• Nov 14, 2009

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• #2

Hmmm, a little heat, and I used my bigger impact wrench, and it came off like it wasn't even tight :-)

 

J

_JOE_

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May 10, 2007

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• Nov 14, 2009

• #3

It's called thread lock. Until you heat it it will.....lock the threads.

 

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Brandon H.

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Mar 26, 2009

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• Nov 14, 2009

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• #4

_JOE_ said:

It's called thread lock. Until you heat it it will.....lock the threads.

Click to expand...

Hence the reason I added heat :fft: :) . I just wanted to be sure the threads weren't a reverse thread or something, last thing I want to do is crank on it with the impact till it breaks. Then I figured maybe it has loctite on it, sure enough it did.

 

J

_JOE_

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May 10, 2007

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• Nov 14, 2009

• #5

Good thinkin'! Even in the correct direction you can severely damage the threads by not applying heat.

 

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Brandon H.

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Mar 26, 2009

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• Nov 15, 2009

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• #6

Hmmm ok, so now that I have everything split, I will be getting new bottom end bearings and gaskets tomorrow.

I plan on getting the engine done tomorrow. This engine uses a gasket between the 2 center cases, should I apply permatex ultra grey to the gasket aswell or just leave the gasket plain with no gasket maker???

Also what kind of gasket maker can I use on the other side of the case (clutch side, but not clutch cover).

Also I know in the automotive world, and from building race cars with my dad, we used a chap stick on the gaskets to keep them from sticking on Holley carbs so changing jets in the pits before a race was easier, think it will work here and make future gasket removal easier????

 

J

_JOE_

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May 10, 2007

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• Nov 15, 2009

• #7

Most bike manufacturers offer some gasket makers that work well. This has been discussed alot on here, if you do a search you'll find what you're looking for.

Never heard of the chap stick thing.

 

J

julien_d

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Oct 28, 2008

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• Nov 15, 2009

• #8

I'm used to putting chap stick on carb gaskets on cars so they can be re-used. Never tried it on a bike but I see no reason not to.

J.

 

Patman

Pantless Wonder

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Dec 26, 1999

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• Nov 15, 2009

• #9

You sure it was chapstick and not gasket dressing? It comes in a roll up tube just like it and is used to hold gaskets in place and help create a seal without drying like silicone gasket material.

 

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Truck12

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Oct 15, 2009

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• Nov 15, 2009

• #10

Patman said:

You sure it was chapstick and not gasket dressing?

Click to expand...

It was chapstick, they had it in hodrod magazine 100 tech tips back in the 80's.

 

2

2strokerfun

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May 19, 2006

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• Nov 16, 2009

• #11

If cases are smooth, I prefer just a light coat of grease. Holds the gasket in place comes off easy next time you split the cases. If surfaces are iffy, I normally use yamabond or the equivalent.
Chapstick is intersting. Seems like it would work similar to grease and hold in place and help with swelling.

 

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Brandon H.

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Mar 26, 2009

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• Nov 16, 2009

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• #12

Yeah the chap stick thing works, I just didn't know if I could apply it here too. I think I will do the grease method like your saying. Whenever my dad had his 69' Nova, we would always be making changes at the drag strip on the carb, and Holleys have the brown paper gaskets (cheap), or the blue fancy nonstick (expensive) ones. Chapstick really helped a lot. He even let me take it around the block once when I was 14, that 383 stroker would smoke the tires

But yeah, I will use grease on the center cases with the gasket, should make tear down in a year a little easier. Now, what about the clutch side case? I searched, and I cant find the info.