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Sportster Motorcycle Motor - Top End Discuss Sportster Motorcycle Top End issues. Rockerboxes, Valves, Cylinders, Pistons, Rings, Lift Rods, etc...

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  #51  
Old 13th November 2013
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Well its a bitch to wait out the cycles but !
Helped Twilkie do his and followed the procedures
Extra assembly lube and all it never had even a puff of white smoke !
Checked the barrel temps with a raytech thermo so no guessing !
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  #52  
Old 13th November 2013
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All this "wisdom" from a guy who suggests putting jb weld in your head ports.....

http://www.mototuneusa.com/power_news_--_homework.htm
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  #53  
Old 13th November 2013
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Originally Posted by Bob s hog View Post
im sure they can tell they seen lots of damaged parts .
You're right, I imagine they have. My bad.
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  #54  
Old 13th November 2013
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Quote:
Originally Posted by Jordan5150 View Post
All this "wisdom" from a guy who suggests putting jb weld in your head ports.....

http://www.mototuneusa.com/power_news_--_homework.htm
There is a lot of people who weld and jb weld ports. The jap bikes typically benefit from smaller higher velocity ports, since they're turning much higher rpms then Harley's.. however, because something works in a water cooled high rpm motor, doesn't mean it will work in an air cooled torque monster..
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  #55  
Old 13th November 2013
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sorry jordan5150 but you would be supprised how much that is yoused in porting and it works great .
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  #56  
Old 13th November 2013
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Hmm, never thought of how it could benefit a jap motor, I doubt it would do much for our motors though. Have to make sure the jb weld sets properly because a chunk coming loose would be bad new bears for your motor.
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  #57  
Old 13th November 2013
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I have seen shops use the JB weld with okay results but I have also seen it break off and get sucked into the engine which can be a very bad thing. At NRHS we only TIG weld if we want to add material. We NEVER use JB weld!
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  #58  
Old 13th November 2013
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Quote:
Originally Posted by Jordan5150 View Post
Hmm, never thought of how it could benefit a jap motor, I doubt it would do much for our motors though. Have to make sure the jb weld sets properly because a chunk coming loose would be bad new bears for your motor.
Harley evo heads are very sensitive on the short radius. It is not uncommon to increase the short radius with high temp epoxy when porting. But it has do be done correctly.

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Old 13th November 2013
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that is what NRHS does (especially S&S heads) but we TIG weld them instead of epoxy as I said. I have a very nice pulse welder just for this purpose.
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  #60  
Old 13th November 2013
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Quote:
Originally Posted by NRHS Sales View Post
that is what NRHS does (especially S&S heads) but we TIG weld them instead of epoxy as I said. I have a very nice pulse welder just for this purpose.
I agree. I like welding a lot better. Especially on these aircooled heads.
Since the exhaust often needs to be welded, why not use the same method on the intake.

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