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38 Posts
G'day all.
I'm hoping someone here can help me and who has the same Cobra Speedster Slashdowns pipes as I do to verify if there is a metal tube sleeve in each pipe near the power port crossover. You might have to remove one baffle out and flash a torch down the pipe to see what I'm talking about.
If you look at my rough sketch of my pipes you'll see that the metal tube sleeve I'm talking about is drawn in red and goes into the baffles about 15 to 20mm.
I want to know if that's normal for these pipes?
By now you'll be asking Why?
Well, a while ago last year I had some custom quite baffles made up.
They did the job of toning the sound down alot but now I want to go back to loud stock Cobra baffles for a while to gain more power.
When I went for a blast I notice a slight flutter or a churning sound on decelerate with the Cobra baffles in.
My bike never made that sound before the custom baffles was put in and I couldn't really hear that flutter sound with the quite baffles on.
I went back to the shop who made the custom baffles for me and ask him if he put those metal tubes in or not?
But after all this time he can't remember what he's done to my bike.
I also did the Bluey clutch hub fix roughly at the same time.
In the back of my mind I wonder if the hub could be making that flutter sound on decel. I left the springs in the hub abit loose so they can spin alittle.
But I really think it sounds like an exhaust sound problem that's in the pipes.
I did take off the exhaust from the headers and start up the bike for 30 sec's to hear if it would make that flutter sound on decel. I couldn't hear that sound coz the bike was spitting blue flames and popping a fair bit. So I shut it down before I can damage the valves. I hope I didn't stuff up the valves!
So there u go. That's my story of a problem that I'm trying to sort out at the moment.
Any help out there would be much appreciated.
Cheer's.
I'm hoping someone here can help me and who has the same Cobra Speedster Slashdowns pipes as I do to verify if there is a metal tube sleeve in each pipe near the power port crossover. You might have to remove one baffle out and flash a torch down the pipe to see what I'm talking about.
If you look at my rough sketch of my pipes you'll see that the metal tube sleeve I'm talking about is drawn in red and goes into the baffles about 15 to 20mm.
I want to know if that's normal for these pipes?
By now you'll be asking Why?
Well, a while ago last year I had some custom quite baffles made up.
They did the job of toning the sound down alot but now I want to go back to loud stock Cobra baffles for a while to gain more power.
When I went for a blast I notice a slight flutter or a churning sound on decelerate with the Cobra baffles in.
My bike never made that sound before the custom baffles was put in and I couldn't really hear that flutter sound with the quite baffles on.
I went back to the shop who made the custom baffles for me and ask him if he put those metal tubes in or not?
But after all this time he can't remember what he's done to my bike.
I also did the Bluey clutch hub fix roughly at the same time.
In the back of my mind I wonder if the hub could be making that flutter sound on decel. I left the springs in the hub abit loose so they can spin alittle.
But I really think it sounds like an exhaust sound problem that's in the pipes.
I did take off the exhaust from the headers and start up the bike for 30 sec's to hear if it would make that flutter sound on decel. I couldn't hear that sound coz the bike was spitting blue flames and popping a fair bit. So I shut it down before I can damage the valves. I hope I didn't stuff up the valves!
So there u go. That's my story of a problem that I'm trying to sort out at the moment.
Any help out there would be much appreciated.
Cheer's.