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Several people have complained that their after market pipes are too loud.
This can be very annoying on long trips. Here is a cheap and easy modification for the DG HK baffles.
1. Go to
Home Depot and buy 2 Danco Crumb Cups. Located in the sink repair
department. Danco part #89049. The price at my Home Depot was $1.48
each. They appear to be stainless steel.
2. Remove the baffle set screw with a 3/16" Allen head wrench.
If the baffle has been in for a while, a squirt of WD-40 around the inner edge will assist with the removal.
3. Place the baffle in a vise.
4.
The lip of the crumb cup needs to be ground so it will fit inside the
baffle. Slowly turn on a grinder using a pair of pliers or welders
gloves (it will get hot!)
5. Cut between holes on 4 sides of basket using a pair of dykes. Bend up and down where cuts were made.
 
6.
Insert basket into baffle. Push down until the lip on the basket
contacts the lip inside of the baffle. Tap lightly around the basket's
outer edge with a screwdriver or drift and a hammer if necessary. The
cut and bends on the 4 sides will hold the baffle in place. I also
recommend taking a punch and lightly staking the basket around it's
lip. 3 or 4 light stake points should assure a rattle free assembly.
NOTE: The crumb cup (basket) goes in the end coming from the header pipe.
7. Put baffle back in exhaust pipe. That may be the hardest part! Lining it back up takes practice!
Be sure to use some Loctite on the set screw when reinstalling. Be sure to wipe away any remaining WD-40.
The
resulting sound will be somewhere between a stage 1 and stage 3 mod on
the OEM pipes. This will result in a slight loss of power. You can
continue to fine-tune the sound and performance by drilling out the
center hole of the inserted cup (see below).
 
I personally did the additional mod pictured above on the right and am very happy with the volume and performance.
EDITOR
NOTE: Mike also sent us this picture of an alternative suggested to him
by Starman with the following note: "Alternatively, you could attempt
the same mod without removing the baffles as pictured above.
Wedge the crumb cups into the back of the baffle and seal with a
hi-temp silicone" -Thanks Starman!
Questions should be asked in our forum (Use discuss link below).
The forum is very active and you stand a good chance of getting your questions
answered there. If you would like to leave feedback
for the author, or have additional information you think will benefit others, please use
the comment section at the bottom of this page.
Discuss this article on our forum. (0 posts)
DISCLAIMER:
This information and procedure is provided
as a courtesy and is for informational purposes only.
Neither the publishers nor the authors
accept any responsibility for the accuracy, applicability, or
suitability of this procedure. You assume all risks associated
with the use of this information. NEITHER THE PUBLISHERs NOR THE AUTHORs
SHALL IN ANY EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, PUNITIVE, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES, OF ANY NATURE ARISING OUT OF OR IN ANY WAY
CONNECTED WITH THE USE OR MISUSE OF THIS INFORMATION OR LACK OF INFORMATION.
Any type of modification or service work on your motorcycle should
always
be performed by a
professional mechanic.
If performed incorrectly,
this procedure may
endanger the safety of you and others
on your motorcycle and possibly
invalidate your manufacturer’s warranty.
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Hard Krome baffles
Written by rev1700 on 2005-08-13 17:23:08
I
followed the directions in the tech tips section for Hard Krome
baffles, and this home brew solution cut the harsh edge just enough so
that the factory baffles still have plenty of character without being
obnoxious. It was reasonably straight-forward. Adding a bit of back
pressure increased my performance and my gas mileage.
rev1700 | Written by postie on 2006-02-03 08:28:25
Hi guys,
I'm
interested in buying some DG HK 2.75 Big Straights, but can't find a
distributor in Australia. I e-mailed the company, but have not had a
reply. Can somebody tell me what they cost at the moment, as I'm not
sure if the prices I've got are current. U.S. dollars is OK, I can do
the conversion to Aussie dollars. I think it will be cheaper for me to
import a set of pipes from the States than to have a set made here, and
I really like the look of the DG HK pipes. |
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