Building a Chopper: Seeking Expert Advice on Transmission Mounting

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Discussion Overview

The discussion revolves around the challenges of mounting a transmission for a custom-built chopper motorcycle. Participants share their experiences, suggestions, and resources related to transmission mounting and frame construction.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant is seeking advice on transmission mounting for a hardtail chopper frame and expresses a desire to learn more about the process.
  • Another participant mentions that most engines have the transmission built-in, indicating a lack of familiarity with chopper-specific components.
  • A participant offers to sell plans for a chopper frame and jig, suggesting that these resources could assist in the building process.
  • One suggestion involves examining existing frames at custom motorcycle shops or Harley-Davidson dealerships for guidance on mounting techniques.
  • A detailed approach is provided for mounting the transmission, including steps for aligning the primary drive and ensuring the mount is level and square within the frame.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the best approach to transmission mounting, and multiple viewpoints and suggestions are presented without resolution.

Contextual Notes

Some participants express uncertainty about specific components and techniques related to chopper construction, indicating a reliance on personal experience and anecdotal advice.

Who May Find This Useful

Individuals interested in custom motorcycle building, particularly those focused on chopper designs and transmission mounting techniques.

sheldon
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I am building a custom chopper, hardtail frame. I am learning as I go and I had a video to help me but my vcr ate it. Does anybody know about transmission mounting or anything about bikes?
 
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I know a little, but nothing about choppers. I thought most Engines had the tranny built in. I don't know much about HD components though.


I've been wanting to do a chopper myself someday, but use a Hyabusa engine.

Uhm, let me ask my bro about that and I'll get back to ya. He's put a good bit of time into them.
 
I have a set of Chopper Frame and Jig plans for sale. 7 plans. All dimensions and angles are included. I put a page on my welding website so I didn’t clutter up the forum.

www.butchswelding.com/frames.html

Email me if you want more info.

Thanks a lot!
Mitch

canadian_welder@yahoo.ca
 
you could always look at another frame at a custom motorcycle shop, or any HD dealership for that matter. if you had the time, you could completely gut the trans case, bolt the mounting plate to it, and bolt it to the inside of the primary and bolt that to the engine. That would align your primary drive, and then all you would have to do is make sure that your secondary belt is aligned. Then tack the mount in place, check your measurements again and weld. Just make sure that the mount is mounted level, and inline, I helped my friend put in his engine mount (which is basically the oppsite way) and we had huge headaches the first time we tried because we didn't make sure it was square in the frame, and the outside primary cover would not fit.
 

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