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  #1 (permalink)  
Old 10-28-2013, 11:34 AM
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Question RN mono help

I need some help, first time build long time rider.

I have been talking to nobody at RN fixin to order my frame its going to be a mono shock chopper here is the hard part that I need some help with.
And yes I know its all preference but has anyone here build a mono with
8 up ? 9up 10up trying to figure out how this thing will ride as a daily it will not be a trailer queen this is what I had in mind

9 UP 5 out and a 46 rake yes a long bike

So I came here to hear from the experts or find someone how may know more than I do and on this one that will be easy

I don't want to make a mistake that will cost me 20k
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  #2 (permalink)  
Old 10-28-2013, 01:13 PM
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I've always liked the idea of the mono-shock frame, but not in the chopper sense, but rather from the late 70's when some of the motocross guys started to experiment with a fully floating, articulating frame. In particular those with a swingarm fork cantilever single shock mounted horizontal under the frame backbone (oil tank area eg.) I have often thought about building a chopper with the same design, I may still try to build a functional prototype.

May be a bit of an engineering challenge for a first time builder though, you may want to draw out your design and get a structural integrity assessment from a mechanical engineer to ensure your geometry doesn't compromise the strength limits of your materials.

CC member "Chopsmitty" has done some unconventional frames using Kiwi leaf spring rear setups, you could PM him for some advice.

Far as setting up for "rideability" I would suggest you figure out your front-end geometry with the dimensions you describe by using the "rake calculator" on RBracing website (among others). Remember, all front end rake calculations are based on their geometric proximity to the REAR axle, when you start changing rear geometry, all front end dimensions will change.

Sounds interesting.. Keep us posted.

Mak
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Last edited by MAKO6; 10-28-2013 at 01:26 PM..
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Old 10-28-2013, 01:34 PM
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will do this bike is 10 up 6 out and 46 just don't know who owns it but this is what its going to look like
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Old 10-28-2013, 01:38 PM
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this one is a mono shock and this is what im going for
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  #5 (permalink)  
Old 10-30-2013, 08:14 AM
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Should I ask this question some where else ?
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Old 10-30-2013, 09:21 AM
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I think the majority of the people here have 4" or less added in the downtubes....
I would definitely go with a springer front end. As for a $20K mistake, get the thing all built and ride it! If you don't like it, you can always shorten things up and it's alot cheaper doing it before paint and powder. Certainly not a $20K change.
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Old 10-30-2013, 10:55 AM
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Quote:
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I think the majority of the people here have 4" or less added in the downtubes....
I would definitely go with a springer front end. As for a $20K mistake, get the thing all built and ride it! If you don't like it, you can always shorten things up and it's alot cheaper doing it before paint and powder. Certainly not a $20K change.
Absolutely correct, I always like to ride mine after mock up, I usually end up making changes after that. Since you want this thing to be an agreeable, rideable bike, I would recommend you contact Sugar Bear, he has tons of experience with really long front ends, the one bike that I rode that had an 18 over Sugar Bear front end on it handled and rode great.
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Old 10-30-2013, 11:21 AM
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my skill leave is not going to allow me to start cutting on this frame and me still ride it lol
Im going to have to make the right desertion on the frame from the get go I was just looking for some insight from someone that had some experience with a bike that high. My brain is telling me to stick with 6up my heart tells me 8up and just deal with it
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Old 10-30-2013, 11:31 AM
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Funny, there's a build thread about 330 monoshock , stretched out and with a springer- right next to your thread. You might wanna look closely into it.
Thre guy did an excellent job in fabricating and putting it all together.

Such huge bikes is not my cap of tea- i would think they would be out of practical and esthetic fassion by now. Yet, i guess people still 'discover' their appeal.
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  #10 (permalink)  
Old 10-30-2013, 11:53 AM
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Saw that bike went though and read everything 2 time not one time did he tell me how high it was. But that is a very nice bike.
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Old 10-30-2013, 01:11 PM
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Quote:
Originally Posted by Captain America View Post
Absolutely correct, I always like to ride mine after mock up, I usually end up making changes after that. Since you want this thing to be an agreeable, rideable bike, I would recommend you contact Sugar Bear, he has tons of experience with really long front ends, the one bike that I rode that had an 18 over Sugar Bear front end on it handled and rode great.
+1 Sugar Bear
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Old 10-30-2013, 01:20 PM
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start hitting the local bike shows or custom shops and look or ask if they have one that high. I would think some one at Strokers would have a long bike.
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Old 10-30-2013, 02:07 PM
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Good old Strokers ............ Good place ......... See a lot of long bikes just not that high
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