CB360 Shock Angle/Tire Height HELP
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o1marc
Over 1,000 Posts
Talk about putting the cart before the horse. Don't you think some more preplanning was in order before you got that far?
The stock height of the tire off the ground when on the center stand on what bike? Do you know how negatively lengthening your swing arm will effect handling? If you extend the swing arm you will also now need a longer chain. Seems like you tried to fix one issue for "a look" and created 3-4 more issues to fix. :
The stock height of the tire off the ground when on the center stand on what bike? Do you know how negatively lengthening your swing arm will effect handling? If you extend the swing arm you will also now need a longer chain. Seems like you tried to fix one issue for "a look" and created 3-4 more issues to fix. :
sav0r
Coast to Coast
Forget about distance between the tire and the ground. There are too many variables there to control. Tire circumferences vary across brand, model, and even within the same brand and model. Even if tires were all perfect, I doubt all center stands are the same.
What you want to do is set the bike up at stock ride height with stock caster angle, then let the wheel with the same tire you are going to use sit on the ground. Then you can measure the swing arm angle. Using ride height, castor angle, and swing arm angle allows you to set all chassis parameters, including wheelbase. A high quality digital level works best for these measurements.
You'll need to make some accommodation for suspension sag. I'd take the spring off the dampers, measure out the total available travel, set the shock rod to about 30% compression, measure the center to center length, then make some solid pieces of that length to use for frame mock-up.
As for shock angle somebody is going to have measure that for you.
What you want to do is set the bike up at stock ride height with stock caster angle, then let the wheel with the same tire you are going to use sit on the ground. Then you can measure the swing arm angle. Using ride height, castor angle, and swing arm angle allows you to set all chassis parameters, including wheelbase. A high quality digital level works best for these measurements.
You'll need to make some accommodation for suspension sag. I'd take the spring off the dampers, measure out the total available travel, set the shock rod to about 30% compression, measure the center to center length, then make some solid pieces of that length to use for frame mock-up.
As for shock angle somebody is going to have measure that for you.
mydlyfkryzis
当有疑问时踢你的敌人在生殖器上，你可以道歉后
You are racing a CB360? Hopefully only against other CB360's.......It helps if you race slow against slow....
Why didn't you measure the original mount dimensions before cutting?
Also, the CB360 really doesn't have a subframe....You shortened the frame....A subframe is removable, and only the little loop in the back was removable on a CB360. Newer bikes have formal sub-frames. If you needed to cut or burn off a part, it is not a sub-frame.
The reason I can't answer your question directly is because there isn;t enough information. Unless you are using stock shock heights, stock spring rates, stock swingarm, the location and angle and tire height are irrelevant. The angle of the shock will affect the damping and spring rate. If you are doing serious frame modifications, then you need to calculate the forces and angle for your particular setup. (or just wing it and hope for the best). If you are actually building a true race bike, you should have the skills to calculate the proper damping, spring rate and shock angle to get the best result.
Nobody hating here, but you may be doing it wrong and many of us don't like helping someone down the wrong path.
Why didn't you measure the original mount dimensions before cutting?
Also, the CB360 really doesn't have a subframe....You shortened the frame....A subframe is removable, and only the little loop in the back was removable on a CB360. Newer bikes have formal sub-frames. If you needed to cut or burn off a part, it is not a sub-frame.
The reason I can't answer your question directly is because there isn;t enough information. Unless you are using stock shock heights, stock spring rates, stock swingarm, the location and angle and tire height are irrelevant. The angle of the shock will affect the damping and spring rate. If you are doing serious frame modifications, then you need to calculate the forces and angle for your particular setup. (or just wing it and hope for the best). If you are actually building a true race bike, you should have the skills to calculate the proper damping, spring rate and shock angle to get the best result.
Nobody hating here, but you may be doing it wrong and many of us don't like helping someone down the wrong path.
