103" Stage II Questions
Tourer
Joined: Jul 2007
Posts: 435
Likes: 0
From: Central Arizona
What pipes are you running? Mine (Rinehart TD's) crack pretty good at WOT but sound sedate when I feather the twist grip. Vibration has been a bit more noticeable lately, but this bike has 30K miles already. I was also wondering how to check the front motor mount, besides torque wrench...
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Road Captain
Joined: Nov 2007
Posts: 554
Likes: 0
From: SoCal
The increased noise you noticed, is this comparing it to the stock air cleaner or did you have the SE air cleaner before the 103" was installed? In my case I installed the Stage I first and that air cleaner is definitely louder than the stock one. When I installed the 103" Stage II including 255 cams is when I noticed the popping sound. Do you hear a popping sound when you gas it? This sound starts at about 2200 rpm or so and eventually becomes more of a roar as the rpms increase.
Also, do you notice any buzzing from the floor boards when riding?
Thanks,
Marc
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Road Captain
Joined: Nov 2007
Posts: 554
Likes: 0
From: SoCal
What pipes are you running? Mine (Rinehart TD's) crack pretty good at WOT but sound sedate when I feather the twist grip. Vibration has been a bit more noticeable lately, but this bike has 30K miles already. I was also wondering how to check the front motor mount, besides torque wrench...
Marc
Outstanding HDF Member
Joined: Sep 2007
Posts: 3,352
Likes: 4
From: Augusta, GA
The popping is probably the cams. They have pretty sharp ramps so the valves are opening much faster and closing much faster. A good cam will always let you know it's doing its job.
The vibration may be a balance issue. Was the crank runout measured before the cams were installed? Are the cams gear drive? Sometimes the rubber in the motor mounts break down and the engine slips onto the frame and that can cause really bad vibration that will have differing amounts at different RPMs. You can look @ the motor mounts to see if there is any metal to metal contact going on.
The vibration may be a balance issue. Was the crank runout measured before the cams were installed? Are the cams gear drive? Sometimes the rubber in the motor mounts break down and the engine slips onto the frame and that can cause really bad vibration that will have differing amounts at different RPMs. You can look @ the motor mounts to see if there is any metal to metal contact going on.
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Road Captain
Joined: Nov 2007
Posts: 554
Likes: 0
From: SoCal
The popping is probably the cams. They have pretty sharp ramps so the valves are opening much faster and closing much faster. A good cam will always let you know it's doing its job.
The vibration may be a balance issue. Was the crank runout measured before the cams were installed? Are the cams gear drive? Sometimes the rubber in the motor mounts break down and the engine slips onto the frame and that can cause really bad vibration that will have differing amounts at different RPMs. You can look @ the motor mounts to see if there is any metal to metal contact going on.
The vibration may be a balance issue. Was the crank runout measured before the cams were installed? Are the cams gear drive? Sometimes the rubber in the motor mounts break down and the engine slips onto the frame and that can cause really bad vibration that will have differing amounts at different RPMs. You can look @ the motor mounts to see if there is any metal to metal contact going on.
The crank runout was not checked. This is an '09 bike so however the OE cams are driven is how this one is. The only difference is the grind. This being a new bike with only < 4K miles on it so the mounts shouldn't be worn out yet. I'd like to check the mounts and see if there is anything wrong. Can you tell me what to look for?
Thanks for the help,
Marc
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Road Master
Joined: Jul 2007
Posts: 792
Likes: 0
From: Niagara Falls, NY
With an '09 you should consult you service manual and it should give you proper values. Did it shake before you had the 103" in? If it was after, maybe the tech did not do something to mounts corectly. Seeing it is a new system of mounting I would suspect that might be the case. I did look at an '09 and see there might be a new procudeure, but the manual would give you a better indication.
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