DynoDon
Moderator
AKRA is pleased to add the following update to the DCD 212 engine platform.
ADD to DCD212: Muffler. For the remainder of the 2024 AKRA events the following Exhaust change is permitted.
RLV EXF 5066 pipe and RLV 4125 Silencer may be used.
Pipe may be wrapped with heat wrap in its entirety or wrapped to the mounting brace only. Wrapping not mandatory. It is highly recommended for the use of the Big Bertha type chain guard if not wrapping.
Following are the specs for the exhaust:
DCD 212 Header: EXF 5066
20-1: Length- maximum 7 inches minimum 6 7/8. To be measured from inside short radius using right side bolt hole with 1/4 inch tape when removed from engine. By placing a 1/4 measuring tape under the corner of the bottom fin of the head stretch measuring tape across top of pipe to end of pipe. Measurement should be 16 1/8 plus or minus 1/8 inch.
20-2: Outside diameter: 1 inch
20-3: Height- 10.5 inches. Measured with engine off mount on flat surface to tallest area of header.
20-4: Flange: .250 Maximum with consideration to metrology
20-5: Weld: Not to exceed .250 in height, total circumference from flange to pipe on both inside and outside.
20-6: Pipe must extend into silencer to a depth that does not permit exhaust to leak through slots in the silencer. Place the end of a 1/4 inch tape in the corner of the bottom fin of the head. Stretch measuring tape from bottom of head fin across highest portion of pipe to slotted end of silencer. Slotted end of silencer must be 7 3/4 inches or less.
20.6-1: Wrap: pipe may or may not be wrapped. If wrapping, pipe may be wrapped to brace or beyond brace to end of silencer. If not wrapping big Bertha type guard to be used!!
20-7: Silencer: EXF 4125
20-7-1: Screens: 5 screens.
20-7-2: Hole size of screens .1285 no go.
20-7-3: Diameter: 2.224
20-7-4: Body: 6 3/16
20-7-5: Mounted Height: Measured with engine off mount on flat surface to highest point at end of silencer. 6 inches.
20-7-6: Gasket: One gasket or Silicone. One or the other.
20-7-8: Maximum length of pipe and silencer not to exceed 16 1/8 inches. To be measured by placing the end of a 1/4 measuring tape under the bottom corner of the bottom fin of the head. Stretch measuring tape across the top of the pipe to the end of the silencer.
There is a picture on my website under the Photos category to demonstrate placement of the tape measure to measure for the above specs.
www.dynodonkartengines.com
ADD to DCD212: Muffler. For the remainder of the 2024 AKRA events the following Exhaust change is permitted.
RLV EXF 5066 pipe and RLV 4125 Silencer may be used.
Pipe may be wrapped with heat wrap in its entirety or wrapped to the mounting brace only. Wrapping not mandatory. It is highly recommended for the use of the Big Bertha type chain guard if not wrapping.
Following are the specs for the exhaust:
DCD 212 Header: EXF 5066
20-1: Length- maximum 7 inches minimum 6 7/8. To be measured from inside short radius using right side bolt hole with 1/4 inch tape when removed from engine. By placing a 1/4 measuring tape under the corner of the bottom fin of the head stretch measuring tape across top of pipe to end of pipe. Measurement should be 16 1/8 plus or minus 1/8 inch.
20-2: Outside diameter: 1 inch
20-3: Height- 10.5 inches. Measured with engine off mount on flat surface to tallest area of header.
20-4: Flange: .250 Maximum with consideration to metrology
20-5: Weld: Not to exceed .250 in height, total circumference from flange to pipe on both inside and outside.
20-6: Pipe must extend into silencer to a depth that does not permit exhaust to leak through slots in the silencer. Place the end of a 1/4 inch tape in the corner of the bottom fin of the head. Stretch measuring tape from bottom of head fin across highest portion of pipe to slotted end of silencer. Slotted end of silencer must be 7 3/4 inches or less.
20.6-1: Wrap: pipe may or may not be wrapped. If wrapping, pipe may be wrapped to brace or beyond brace to end of silencer. If not wrapping big Bertha type guard to be used!!
20-7: Silencer: EXF 4125
20-7-1: Screens: 5 screens.
20-7-2: Hole size of screens .1285 no go.
20-7-3: Diameter: 2.224
20-7-4: Body: 6 3/16
20-7-5: Mounted Height: Measured with engine off mount on flat surface to highest point at end of silencer. 6 inches.
20-7-6: Gasket: One gasket or Silicone. One or the other.
20-7-8: Maximum length of pipe and silencer not to exceed 16 1/8 inches. To be measured by placing the end of a 1/4 measuring tape under the bottom corner of the bottom fin of the head. Stretch measuring tape across the top of the pipe to the end of the silencer.
There is a picture on my website under the Photos category to demonstrate placement of the tape measure to measure for the above specs.
www.dynodonkartengines.com
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