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Raising the rear?

  #1  
Old 01-30-2010, 06:44 PM
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Default Raising the rear?

Is there a way to shim or raise the rear without adjusting preload?
 
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Old 01-30-2010, 09:06 PM
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You can purchase or make an aluminum shim and install it on the upper shock bolt between the frame and the upper rear shock mount. Most usually start by adding a 5mm shim. This will raise the rear of the bike, promoting better turn in and giving a little more ground clearance and lean angle when cornering aggressively. When reinstalling the nut, be sure the shock bolt protrudes at least slightly through the nut. If not, order a longer shock bolt. Some F4i's (i think earlier years) had a shorter shock bolt. Ordering a new OEM rear shock bolt/bracket is supposed to get you the longer bolt that fits all years of F4i. www.servicehonda.com has this bolt/bracket for under $8. Part # 50233-MBW-J30.
 
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Old 01-30-2010, 11:20 PM
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Exellent. I added 3mm of fork tube above the triple but then raised the front 10mm with the preload, so I need at least 7mm of rear height to get back to where I started. I want 10mm more to start with though so I can fine tune with the fork tubes in the triples. I've read that because of linkage the shim used is actually multiply'd a certain amount [like a 1mm shim raises the bike 2-3mm], is the F4i this way also?
 
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Old 01-30-2010, 11:27 PM
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Yes, that's why most start with a 5mm shim. It will raise the rear more than the thickness of the shim, but I'm not sure what the ratio is. Experiment with it.
 
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Old 02-02-2010, 12:12 PM
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A guy on a local forum is talking about needing to swap the shock linkage to a vfr piece and that you have to use a square spacer and weld it or use a screw stop or else it starts rotating as your riding. Anyone ever hear anything about this? I don't want to take it all apart to find out I can't do anything yet.
 
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Old 02-02-2010, 06:29 PM
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I guess the bike could be raised by changing the shock linkage or dogbones as they're called. Lowering by changing dogbones is a common practice. Why go to all that trouble though when a simple shim will do the job.
 
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Old 02-03-2010, 03:48 PM
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Changing preload does not change ride height.
 
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Old 02-04-2010, 08:08 AM
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Adding preload reduced sag. If the bike sags less then it dosen't go down as far, hence the change.

Originally Posted by backroad View Post
I guess the bike could be raised by changing the shock linkage or dogbones as they're called. Lowering by changing dogbones is a common practice. Why go to all that trouble though when a simple shim will do the job.
Like I said Im worried about the top shock and mount rotating. I have no idea what he ment by the link, Im not really concerned with it so much. I can see where honda has a ridge built into the frame the keep the shock mount from rotating. Anyone ever had a problem with this after using some washers as shims?
 

Last edited by boredandstroked; 02-04-2010 at 08:11 AM.
  #9  
Old 02-04-2010, 04:03 PM
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Sag is not ride height. Changing the rear ride height effects the angle of the back end (geometry). Preload effects the spring travel.

I can't remember how the rear shock is mounted on a f4i but if it's like most other bikes there is a top and bottom clevis with the top mounted to the frame and the bottom to the dog bone. The shock will not rotate as it's bolted in place.
 
  #10  
Old 02-04-2010, 04:26 PM
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If anybody has this done or is in the process of doing it, could you take some pictures? Im away at college so I dont have my bike to see exactly where the shim goes and how its done.
 

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