Undertail w/Mori Pipes

Undertail w/Mori Pipes

Ermax Tray

Storage

License on the

Back

License underneath

by the shock

RC51rider Red

Erion Pipes

What you Cut off

Ermax Lens Mounts stock

Bolt Removal

Modified Tail Light Mount

Back

Modified Mount

Front

Installed Mount Inside

Installed Mount Outside

O-Ring Spacers

Ermax Undertail

Mod to fit stock RC51 bulb/socket

The installation is fairly straight forward.  Using the tool of your choice, cut the back end of the stock undertail off as close to the stock tail assembly as possible.  See the pic above to get an idea of what you will be cutting off.  The pic above had already had a fender bob done prior to this undertail install, so you may have substantially more fender hanging down than the above picture.   Use the end of the subframe as a reference point.  I then cut off just the bungee hooks.  The instructions say to cut the sides of the stock undertail flush with the subframe, but I did not do this and it makes for a great tight fit.  If you have Moriwaki pipes mounted, you will need to widen the cut outs on the Ermax undertail to accommodate the larger Moriwaki pipe brackets.  About a 1/4" on the end that is towards the front of the bike and about 1/2" and the end near the rear.  A dremel tool works great for that.  I could not fit the undertail on with the pipes installed, so I removed the pipes from one side by just taking the bracket off the subframe and leaving the bands that mount the pipe to the bracket and lifting it off the collector pipe.  I  loosened the pipe bracket on the other side and slide the tail into position.  I then put the pipe back on the collector pipe.  Then I slid the tail section on and had to drill a hole for the plastic rivets to fit back into the holes. Tighten up all the pipe mounts and the tail is very snug in place.  It said to drill some additional holes to put some screws in, but with the tail in as tight as it was it did not seem necessary.  I then soldered the stock wires into the turn signals.  

The 51's stock brake light wires have a unique socket attached to the end and I didn't want to hack it off and solder the stock wires to the Ermax undertail.  So I took out the sockets and bulb mount on the Ermax undertail and ground them down and cut out as much as possible so that the hot tail light bulbs would not melt the mount (see pic above).  By doing this I did not have to cut the stock wires and could retain the stock bulb and socket.  I then took the stock tail light assembly and cut it down with a dremel tool so that all that was left was a rectangle chunk with the two socket mounts left in it (pic above).  I then replaced the screws in the two round Ermax lens mounts with longer ones.  The originals were 3/4" and you need to put a 1 3/4" to 2" bolt in.  When you back out the stock Ermax bolts, the plastic lens studs will break off (pic above).  When you put the new bolt in, glue these back on with some epoxy.  Then I drilled holes in my modified socket mount to accept the two Ermax lens mounts with the longer screws to go through.  Finally, I used some large O-Rings to space the lens mounts farther back off the tail to keep the lenses from melting from the heat from the bulbs.  Once this was all done, I slid the lens mounts on, tightened everything down, and whala!, it was done.  All that just in order to not have to cut the stock lines.  Lots of work, but to me it was worth it.

One thing to mention.  The turn signal bulbs in the undertail are a lower wattage bulb than the stock turn signal bulbs, and thus cause the blinkers to flash very rapid.  I bought a higher wattage bulb and installed it into the FRONT turn signals and this brought the flash rate back to an acceptable rate.  The stock front bulbs are 23w/8w and I bought a 35w/5w bulb to replace it.  You can get them at Next Collection Auto Accessories for $14.95 a pair.  This works because the bike only has one flasher.  You can also buy an electronic flasher to fix this flash rate problem too.  I chose not to do this again because I did not want to cut or splice the stock wires.

I hope that helps out.

If you have any questions please feel free to email me at: mark@trademarkmotorsports.com