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Joe Foss
Joined: 17 May 2008
Posts: 176
Location: United States, South Carolina, florence
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 Posted: Tue Sep 08, 2009 3:51 am Post subject: |
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| Yep, ca ca occurs, and yep, it is a bummer. Mine is modded, and has been all good for several years. I guess I certainally can't whine to much:( Thanks for the info guys, I will be more careful. |
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Ken Schilling
Joined: 01 Dec 2005
Posts: 1351
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| Posted: Tue Sep 08, 2009 8:15 am Post subject: |
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So, what kind of torque wrench can you use to tighten the cylinder base studs with the engine still on the kart? Right now I just use a 12mm box end wrench and replicate the cylinder head torque as best as possible by hand (I use a torque wrench on the cylinder head).
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Ken Schilling
#21x / S4 / ProKart Challenge (PKC)
SKUSA Data Administrator
Good luck is where preparation and opportunity meet!!!
The opinions I express are mine alone and do not reflect those of any organization of which I am a member. |
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joseph hollinger
Joined: 12 Sep 2002
Posts: 9536
Location: United States, California, san francisco
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Clarence Carter
Joined: 08 May 2008
Posts: 1345
Location: United States, Georgia, Atlanta
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| Posted: Tue Sep 08, 2009 9:00 am Post subject: |
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I have an Idea on how to repair these broken lugs on these cylinders. I will repair 1 free of charge to the first taker if anyone is interested. PM me. Clarence
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Clarence Carter
Joined: 08 May 2008
Posts: 1345
Location: United States, Georgia, Atlanta
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| Posted: Tue Sep 08, 2009 8:33 pm Post subject: |
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I think they are breaking from the stress of pressing in the casting plug. Think about it and look at the pics. Most of these cylinders are breaking in the exact same spot.
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Ken Schilling
Joined: 01 Dec 2005
Posts: 1351
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| Posted: Wed Sep 09, 2009 10:00 am Post subject: |
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| Ken Schilling wrote: | | So, what kind of torque wrench can you use to tighten the cylinder base studs with the engine still on the kart? Right now I just use a 12mm box end wrench and replicate the cylinder head torque as best as possible by hand (I use a torque wrench on the cylinder head). |
I was just shown an inexpensive way to fabricate a way to do this (~$10 overall cost in parts + welding):
Take a 2" socket extension and weld it to the center of a 12mm box end wrench (12 point / preferably a flat one with no bend if you can find it). You may have to grind the left side of the box end (don't use the open end) to clear the right front nut area (a water jacket in the cylinder might cause clearance issues / don't grind the cylinder to clear it!!!). Keep in mind that this will add a couple of inches to the lever arm increasing the torque so you must compensate a little by decreasing the torque setting on the torque wrench. Not sure how much though...perhaps someone a lot smarter than me can provide a calculation to compensate. I can't imagine that it would be more than ~1lb/ft.
I'm also looking into having my cylinder spot faced where the base nuts meet the cylinder.
SwedeTech is now doing this additional prepping to Stock Honda cylinders.
And yes, it's currently SKUSA legal.
20.3.2.6.4. Cylinder: ...Cylinder mounting flanges for retaining cylinder to cases may be spot faced in the area where the nut meets the flange only...
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Ken Schilling
#21x / S4 / ProKart Challenge (PKC)
SKUSA Data Administrator
Good luck is where preparation and opportunity meet!!!
The opinions I express are mine alone and do not reflect those of any organization of which I am a member. |
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joseph hollinger
Joined: 12 Sep 2002
Posts: 9536
Location: United States, California, san francisco
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| Posted: Wed Sep 09, 2009 10:10 am Post subject: |
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| Ken Schilling wrote: |
I was just shown an inexpensive way to fabricate a way to do this (~$10 overall cost in parts + welding):
Keep in mind that this will add a couple of inches to the lever arm increasing the torque so you must compensate a little by decreasing the torque setting on the torque wrench. Not sure how much though...perhaps someone a lot smarter than me can provide a calculation to compensate. I can't imagine that it would be more than ~1lb/ft.
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That's basically the way that the motion pro tool works. The difference being that they show you how to make the calculation and you have to pay an extra $5. 
For what its worth, with my torque wrench and the motion pro tool, the correct setting is 16 foot pounds (to achieve 20 foot pounds at the nut). |
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joseph hollinger
Joined: 12 Sep 2002
Posts: 9536
Location: United States, California, san francisco
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| Posted: Wed Sep 09, 2009 10:20 am Post subject: |
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I forgot to mention,
The chick who works at the counter at Motion Pro has really big boobs. |
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Clarence Carter
Joined: 08 May 2008
Posts: 1345
Location: United States, Georgia, Atlanta
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| Posted: Wed Sep 09, 2009 11:42 am Post subject: |
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I have a sudden urge to go to motion pro.
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Jimmy McNeil
Joined: 12 Apr 2006
Posts: 1483
Location: United States, California, visalia
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| Posted: Wed Sep 09, 2009 5:45 pm Post subject: |
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LMAO  |
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Erik Maxfield
Joined: 16 May 2004
Posts: 1070
Location: United States, California, Vacaville
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| Posted: Wed Sep 09, 2009 7:31 pm Post subject: |
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Are the boobs named Joe and Clarence?
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Erik
The early bird gets the worm.....
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Stock CR125.
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Clarence Carter
Joined: 08 May 2008
Posts: 1345
Location: United States, Georgia, Atlanta
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| Posted: Wed Sep 09, 2009 7:54 pm Post subject: |
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What, you don't like boobs?
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Sonny Van Hook
Joined: 14 Sep 2001
Posts: 955
Location: United States, California, Nor Cal
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Joe Foss
Joined: 17 May 2008
Posts: 176
Location: United States, South Carolina, florence
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| Posted: Thu Sep 10, 2009 3:46 am Post subject: |
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| Jimmy McNeil wrote: | | LMAO |
+1. Ya'll are nuts, or maybe, boobies..... And off topic. 
So I sent my cylinder to Clarence for him to have a go at repairing the lug. We will advise as progress is made. |
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Dan Davis
Joined: 21 Jul 2002
Posts: 2196
Location: United States, Kansas, Wichita
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| Posted: Thu Sep 10, 2009 6:30 am Post subject: |
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| I've seen some success welding broken cylinder lugs then turning the cylinders gasket surface flat again. Then more base gasket or thicker spacer is needed to make up the diff. there. It will likely break again unless you have the swedetech type mod. (spacer and long stud). Then, it might last for quite a while or it may break shortly after. |
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