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Custom Vehicle Discussions => Screamin’ Eagle® Dyna® => Topic started by: gunlvr on May 21, 2011, 08:21:59 AM
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My Dyna seems to be hard to turn over on starting. It runs great once it starts. I was curious if the Dyna's had the Automatic compression relief (or is it release)valves. If so, where are they and do they ever stick in position. I ordered the shop manual from Harley but it hasn't come in yet. Just looking for some helpful advice. Thanks in advance for your time.
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My Dyna seems to be hard to turn over on starting. It runs great once it starts. I was curious if the Dyna's had the Automatic compression relief (or is it release)valves. If so, where are they and do they ever stick in position. I ordered the shop manual from Harley but it hasn't come in yet. Just looking for some helpful advice. Thanks in advance for your time.
All 110's have ACR's. They can fail, and you can also have a situation if you've had a map loaded or the bike tuned where the ACR's become disabled electronically. That can be easily rectified with the tuning software.
Jerry
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My Dyna seems to be hard to turn over on starting. It runs great once it starts. I was curious if the Dyna's had the Automatic compression relief (or is it release)valves. If so, where are they and do they ever stick in position. I ordered the shop manual from Harley but it hasn't come in yet. Just looking for some helpful advice. Thanks in advance for your time.
Your 110 Dyna has automatic compression release valves installed. Do a quick compression test to determine if they are active and working. You will see approx. 130psi to 150psi compression if the compression releases are working, and something over 200psi if compression releases are not working.
For a quick diagnostic test, buy a compression gage at a auto parts store or a place like Harbor Freight. Remove both spark plugs. Screw the compression gage into a spark plug hole. Hold your throttle open and turn your motor over on the starter - 4 or 5 revolutions is sufficient. Repeat the process for the other cylinder... :2vrolijk_21: