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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Mongrel
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<blockquote data-quote="Cyborg" data-source="post: 92741" data-attributes="member: 3426"><p>The frame jig that I am using allows me to have the yoke/tubes/axle in place and I had made up a template that represents the location of the front fender so I can check clearance under full compression. With the motor sitting on a hydraulic lift, I was able to determine how far forward I could mount the engine. The swing arm is in its own jig and ready to be temporary tacked together. Once that's done, it can be offered up to the frame/engine assembly so I can figure out what the wheelbase will be and sort out suspension mounting points. I haven't made the final cuts on the swing arm, so once I measure everything up, I'll cut the tack welds, cut the arms to length and add the chain adjusters/bracing/shock mount etc. I have the swing arm pivot point fixed in the frame jig. There is a laser mounted in the head stock and another laser in a jig hanging from the front axle..... a magnetic angle indicator is attached as well. The lasers will indicate changes in trail as I'm farting around locating the frame/swingarm pivot points. The front yoke assembly is bolted to a mill table (X Y axis) which is in turn bolted to my Rube Goldberg jig, so I can play with W/B, rake, trail etc.. Sounds good on paper.... we'll see how the pudding turns out.</p></blockquote><p></p>
[QUOTE="Cyborg, post: 92741, member: 3426"] The frame jig that I am using allows me to have the yoke/tubes/axle in place and I had made up a template that represents the location of the front fender so I can check clearance under full compression. With the motor sitting on a hydraulic lift, I was able to determine how far forward I could mount the engine. The swing arm is in its own jig and ready to be temporary tacked together. Once that's done, it can be offered up to the frame/engine assembly so I can figure out what the wheelbase will be and sort out suspension mounting points. I haven't made the final cuts on the swing arm, so once I measure everything up, I'll cut the tack welds, cut the arms to length and add the chain adjusters/bracing/shock mount etc. I have the swing arm pivot point fixed in the frame jig. There is a laser mounted in the head stock and another laser in a jig hanging from the front axle..... a magnetic angle indicator is attached as well. The lasers will indicate changes in trail as I'm farting around locating the frame/swingarm pivot points. The front yoke assembly is bolted to a mill table (X Y axis) which is in turn bolted to my Rube Goldberg jig, so I can play with W/B, rake, trail etc.. Sounds good on paper.... we'll see how the pudding turns out. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Mongrel
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