How noisy are these motors?
- NightBiker07
- Posts: 1942
- Joined: April 16th, 2008, 8:59 pm
- Location: USA
How noisy are these motors?
How noisy is a cr500 motor supposed to be? the crank is tight, I just has the top end off. It DOES need bored (the bore has a few issues), but the piston is new and fits snugly in the bore. it has awesome compression, so I didnt see the point in rebuilding it yet, maybe next winter. But the more I ride it, the more I wonder.
My 250 engine is really noisy. Always has been, even with 100% fresh everything. From what people have said, they are knows to be a bit noisy.
So, my question is, how noisy should the 500 be? it isnt louder than the 250, but it isnt quieter either. The noises they make are just different.
My 250 engine is really noisy. Always has been, even with 100% fresh everything. From what people have said, they are knows to be a bit noisy.
So, my question is, how noisy should the 500 be? it isnt louder than the 250, but it isnt quieter either. The noises they make are just different.
2000 CR250, pipe, filter, Vforce
1980 XL80s
1969 Broncco TX-6
Natural selection favors Smart people, so nature selects morons to be slow and dumb for tigers and stuff too eat. But in our modern world there just aren't enough tigers.
1980 XL80s
1969 Broncco TX-6
Natural selection favors Smart people, so nature selects morons to be slow and dumb for tigers and stuff too eat. But in our modern world there just aren't enough tigers.
- 2strokeforever
- Posts: 1524
- Joined: November 13th, 2009, 1:04 pm
- Location: Vernon B.C Canada
- NightBiker07
- Posts: 1942
- Joined: April 16th, 2008, 8:59 pm
- Location: USA
The bike runs really smooth, vibes definitely arent any worse than my 250.
The spots in the bore I had mentioned are two goofy looking, but perfectly matched gouges about as wide as my finger, about a centimeter long. they are right above the exhaust ports, on either side of the bridge. They are causing blow-by streaks on the piston. Not to mention the stud streaks....
Almost seems like grinder marks, but other than the boost ports being touched up a little, the cylinder looks pretty virgin.
I guess I'll run it this year and see how she looks this winter. If it starts vibrating, I'll shut her down and get it done sooner.
The spots in the bore I had mentioned are two goofy looking, but perfectly matched gouges about as wide as my finger, about a centimeter long. they are right above the exhaust ports, on either side of the bridge. They are causing blow-by streaks on the piston. Not to mention the stud streaks....
Almost seems like grinder marks, but other than the boost ports being touched up a little, the cylinder looks pretty virgin.
I guess I'll run it this year and see how she looks this winter. If it starts vibrating, I'll shut her down and get it done sooner.
2000 CR250, pipe, filter, Vforce
1980 XL80s
1969 Broncco TX-6
Natural selection favors Smart people, so nature selects morons to be slow and dumb for tigers and stuff too eat. But in our modern world there just aren't enough tigers.
1980 XL80s
1969 Broncco TX-6
Natural selection favors Smart people, so nature selects morons to be slow and dumb for tigers and stuff too eat. But in our modern world there just aren't enough tigers.
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- Posts: 425
- Joined: July 31st, 2010, 5:22 am
- Location: Tillsonburg On
I believe those are OEM decompression divots. In every 500 cylinder Honda makes. They go away as you bore it. When they aren't there any more, you probably know that cylinder is getting closed to used up. They appear to be causing blow by because that's the earliest opening to the exhaust port with a concentrated flow point. Then it's full on exhaust port function. It's maybe also a de-tuning thing. No worries. BEAT ON IT!
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- Posts: 425
- Joined: July 31st, 2010, 5:22 am
- Location: Tillsonburg On
- NightBiker07
- Posts: 1942
- Joined: April 16th, 2008, 8:59 pm
- Location: USA
it is all the way down the side of the piston where those two divots are, nothing like what you have pictured there, Bob.
2000 CR250, pipe, filter, Vforce
1980 XL80s
1969 Broncco TX-6
Natural selection favors Smart people, so nature selects morons to be slow and dumb for tigers and stuff too eat. But in our modern world there just aren't enough tigers.
1980 XL80s
1969 Broncco TX-6
Natural selection favors Smart people, so nature selects morons to be slow and dumb for tigers and stuff too eat. But in our modern world there just aren't enough tigers.
- NightBiker07
- Posts: 1942
- Joined: April 16th, 2008, 8:59 pm
- Location: USA
I know the bore has issues. It DOES need a top end job. The stud-streaks told me that instantly. Everything fits tight, and it has wicked compression. The whole point of this thread was to see if I was safe to run it, and I believe I have my answer. Since the crank is tight, I am not too worried about it grenading. I was just unsure how much noise is normal for these.AlisoBob wrote:Then you gots issues....NightBiker07 wrote:it is all the way down the side of the piston where those two divots are, nothing like what you have pictured there, Bob.
2000 CR250, pipe, filter, Vforce
1980 XL80s
1969 Broncco TX-6
Natural selection favors Smart people, so nature selects morons to be slow and dumb for tigers and stuff too eat. But in our modern world there just aren't enough tigers.
1980 XL80s
1969 Broncco TX-6
Natural selection favors Smart people, so nature selects morons to be slow and dumb for tigers and stuff too eat. But in our modern world there just aren't enough tigers.
-
- Posts: 425
- Joined: July 31st, 2010, 5:22 am
- Location: Tillsonburg On
- NightBiker07
- Posts: 1942
- Joined: April 16th, 2008, 8:59 pm
- Location: USA
I just got the thing back together, not gonna waste the gasket kit Plus, I have to practically pull the motor to get the jug off :/scooter5002 wrote:Not sure how much of a hurry you are in, but get ahold of Adam. Send it up to his N. Dakota address, have him bore it with the torque plate on, and mail it back. Voila. A job you can count on with a Vertex piston. Live happily ever after. Fairy princess not included.
2000 CR250, pipe, filter, Vforce
1980 XL80s
1969 Broncco TX-6
Natural selection favors Smart people, so nature selects morons to be slow and dumb for tigers and stuff too eat. But in our modern world there just aren't enough tigers.
1980 XL80s
1969 Broncco TX-6
Natural selection favors Smart people, so nature selects morons to be slow and dumb for tigers and stuff too eat. But in our modern world there just aren't enough tigers.