What aluminum alloy is used to weld the side case of my X75 Hurricane?
- Thread starter Hurricanerider
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Not sure what I'm looking at , without so!e serious study ( its 10:20 pm here).
Its why you might need some reaming minimum.
Harley Class C racers , had to heat the cases for 24 hours to get them to bed In. Before they built the engines.
I would be more worried about the Camshaft Bush Shape and alignment in the side case , as you have the Crank Bearing covered.
Chris
Man, you are thorough!!
Hurricanerider
Active Member
Hurricanerider
Active Member
The plate stayed flat.
Carl, there’s a saying, I say, “I just get lucky”.
I have taught people that can do what I do, just less confidence that they have to complete it. I live and breath machining! I have a gift from our Lord. It’s teaching. There’s more than 50 people running around here in Jax that have experience the joy of creating parts that are trapped inside a chunk of metal and you just have to release it.
Carl, there’s a saying, I say, “I just get lucky”.
I have taught people that can do what I do, just less confidence that they have to complete it. I live and breath machining! I have a gift from our Lord. It’s teaching. There’s more than 50 people running around here in Jax that have experience the joy of creating parts that are trapped inside a chunk of metal and you just have to release it.
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I don't think you "just got lucky". I think knowledge, experience, and skill had a little to do with it!! 
If you check the British Triumph sites , you might find something there on better lubrication to the bearing and cams.
I think " Miles Engineering " in UK , do a lot of Triumph and Rocket 3 race bikes.
Also they race them at CRMC , Classic Racing Motorcycle Club in England.
A request in that direction on Facebook , might work... Its all a Lost Art ,
you will find the racers really helpful. Time permitting.
Vintage and Veterans MCC , is the biggest club in England and there "Links" is really useful. They have a racing arm as well, which I think has a Categorical for four stroke Triumphs and Commandos of that Era. Its the Racing , that found all the Rectifiable faults, it really did improve the breed.
There always seems , someone says he's an expert on building anything wear ever you live. But then you live to Regret it , at your expense.
With the cases , if you have to face them , give them a Carborundum grind , its really good . but its a crap thing on lots of Japanese , as they are Warped until they bolt up. Especially on the two strokes.
Chris
Your so lucky to have such enthusiasm around.
I have found , without the gift of lots of Greenbacks equivalent , don't even breakdown !
Race guys , especially the Old bike guys , if there listening , might be moving to " JAX ". I know I would be.!
Chris
Hurricanerider
Active Member
The crank bearing bore stayed perpendicular within .001 to the face. I’m setting up to start a skim cut on the flange face of the casing. I hope I get lucky!
Got to sleep now.
90% preparation , 7% do , 3% bad luck.! or 1% good luck!
..
Hurricanerider
Active Member
We raise a boy who’s 11 in July. My former boss ask me to have him stand in front of a lathe and take a picture for an article he was writing. Tyler was 4. I got him his toy hard hat and made a set of safety glasses fit him and said we’re going to fake you machining a part. He was standing bent over posing and says, “I don’t want to fake it, I want to machine it”. I spent an hour teaching him turning diameters and shoulder cutting and let him at it and took pictures. He was published in a national maintenance magazine along with my friend Kenny who did the welding, standing at a lathe where we worked together, to show young to elder machining. When us old guys die a wealth of knowledge dies. I teach to leave as much as possible for the future. Tyler is now a computer wizard and major gamer. I bought the latest version of BobCAD so he can program , setup, and run my 3 axis knee mill. He’s not interested yet, but I hope someday.
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That is awesome! Great pic.
Hurricanerider
Active Member
I’ll have to hand cut and carefully follow the lip!!!!
This is just the first .008 depth cut.
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Hurricanerider
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Finished! Total of .016. I’ll have to assemble cases with crank and cams to check thrust and rotation. That’s later. Going back to finish the Sprint.
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Outstanding work! Now the Sprint can quit hanging out. 
Hurricanerider
Active Member
The cases fit right up, now if that ain’t some luck. It’s like it was made for it!Outstanding work! Now the Sprint can quit hanging out.
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Excellent!!
