Cranbrook Springer Forked BTR YD100 Replica Build (without fabrication)

Nightster

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Mar 3, 2021
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Ridley did a bullet proof engine mounting system. Ridley Vintage Motorbikes : Models :: The MP (ridleymotorcycle.com)
The Bike Berry work around sucks as usual. OB did a clever thing. You got any of the upper tube hanging around?
Tom
Like this? lol, yup, I do

this is My best option right now.

what about one of those CNC mounts that’s built for a 1.5 inch tube? Would I be able to put some shims on the inside of one of those and make it work with a 1”’ tube?
 

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Nightster

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You said at the git go, it was a project thang. Chain line dominates all engineering choices. Your reference to paper clips as a wrist pin retainer, even a Wisconite would think twice.
I didn’t mean I was gonna use paper clips, I meant the retainer clips look like paper clips ;)

I may have found a solution to the front motor mount. If this won’t work I still have another idea.

Two questions. Do you all think this will be solid enough?

and

can I put the CDI this close to the exhaust?
 

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Nightster

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Got a new steering stem today.

also, I’ve taken the top part of the motor off and all the side covers. Have a strange rough spot on top of the piston. Cylinder walls look pretty good as do the exhaust and intake ports.
 

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Tom from Rubicon

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Apr 4, 2016
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"Is that what that is at the top of the jug? If so that’s not a good sign."
Dunno. Wiser heads will I hope prevail. Could be molding sinks. The color contrast caught my eye. Like a different metal crystal structure. Symmetry is interesting. Top of head photo will be most telling.
Tom
 

Nightster

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Mar 3, 2021
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"Is that what that is at the top of the jug? If so that’s not a good sign."
Dunno. Wiser heads will I hope prevail. Could be molding sinks. The color contrast caught my eye. Like a different metal crystal structure. Symmetry is interesting. Top of head photo will be most telling.
Tom
No markings on the top of the head or in between any of the fans at the top of the head, but the jug has been painted.

what about The imperfection on the top of the piston. Should I try to sand that down with some very fine sandpaper or emery cloth?
 

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