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do you think this would work on a CSC TT250 ????
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This one rocks though.....and is very inexpensive for what you receive. http://www.ebay.com/itm/ALUMINUM-EXH...cAAOSwGvhUICrU |
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Baffle Tuning
Ok...so I was thinking today....there's no reason not to get full tuning ability out of this baffle setup. Like with a Super Trapp, you install and remove plates to adjust backpressure for tuning purposes, this little baffle offers much of the same ability but instead of removable plates, you treat it like a recorder (flute type instrument). It has a movable plug. :-)
So, back to the drill press and I drilled as many more rows as I thought necessary to achieve prime objective, plus, every other hole I drilled a tad larger to help with the fine tuning, minus the first three rows. Anal? Oh yah....but fun all the same. Theoretically, the more back pressure (more holes you block on the flute), the less top end you'll have, while on occasion gaining mid-range or even a little low end in a carburated model. Hopefully the O2 sensor will play. I took it out after opening the baffle all the way (plug installed in last location opening as many holes as possible) and man....it really opened up the top end (butt dyno). More frisky and crisp, especially between 6 and redline. Drawback? It got a little noisier but not a ton. Just more shrill. Tomorrow, I'll move the plug up to block off two rows of holes and see what that achieves. It SHOULD lose a little of the top end but it will probably quiet it a bit also. We'll see. This is fun............ "2LZ at Play". |
Brilliant! I never thought of moving the plug.
I like your vee block. |
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The vee block....Mrs. 2LZ dad cut that out of hardwood for me. It's been a finger saver, for sure. It's my only block of wood I treat as well as a tool. ;-) Oil it twice a year! |
I might need to make a block like that. I have two that are made from steel, but I can see uses for wood.
It would be interesting to find out the tolerance of the stock O2 sensor. The next step is a wide band. |
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This stupid baffle has become just too much fun. ;-) |
I'm with you on the bullet shape. My old Gio quad had that in the stock muffler, which I cannibalized for my XL250S project a few years ago. In that case, I measured the area of the exhaust inlet and calculated how many 1/4" holes would be needed to equal the total area (I then drilled a couple more for good measure). I was quite pleased with the results, since the original Honda exhaust had gone to its reward several years earlier.
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A question for CSCdude, if i want to do this to my bike, will it void my 2 yr warranty?
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Update:
I've been messing with the baffle more. As pictured above, I ran the row of holes to the end, on all three rows. I played with the spark block moving it into different spots. The best it ran, with the best throttle response was obviously in the last location, with the most holes exposed.
So yesterday, I decided to drill 3 more holes each, between the rows of holes, adding some intermediate exit holes. (9 total) I'm not sure if it changed the running personality....but it sure made it louder to the rider. Odd thing was, Mrs. 2LZ was behind me on the TT and neighbor Ron was also back there on Q...and both said the RX3 was very quiet to them. Ron said the TT was louder with the new pipe. Boy, you couldn't have told me that from where I was sitting. Mrs. 2LZ rode the RX3 later in the day and said that it is loud in the riders seat. I was on the TT and it sounded nice and quiet when I was behind it. Weird. The muffler exits about the same place the stock one did. I'm thinking of moving it back further past the bag to see if I can move some of that noise away. Other than that, so far, happy. |
Are you sure the noise you're hearing as rider is not from the intake?
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I did move the spark block last night up one row to cover 9 holes and it seemed to cut the shrill note. It's not that it's too loud, per se...but it's the new tone after the additional holes that kind of sharp to the ear. |
Sound from the muffler should be directed BACK and AWAY from the rider... something isn't right from the sounds of things :hehe:
I'm wondering if the new muffler has a 'complete and proper seal' around the 'muffler / mid-pipe section'... it could explain why the noise is louder for the rider and not those behind you, might be letting exhaust/sound waves out and back towards the rider if the muffler has any kind of gap around it and the exhaust pipe ?? Just a thought from someone a thousand + miles away, maybe start the bike and use your hand around the muffler and other exhaust parts to check for any air leaks ?? |
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