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Discussion Starter #1
Has any tried to modify the exhaust onthe 1800? I like the sound of the Alley Kats and the Torq Master pipes. I was wanting to know if you could drill the baffles in the stock pipes to achieve this sound or is it better to shelll out $400 + bucks for these aftermarket pipes.
 

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My understanding is that you can drill holes in the stock pipes!! When the sound gets like you like it-you will have to buy new pipes anyway.
IOW-I don't think anyone has done this without screwing up the performance/driveability.
 

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http://www.gl1800riders.com/forums/view ... 415d5f022c
http://www.gl1800riders.com/forums/...This previous topic addresses your questions.


After you drill any holes in the aft chamber of the mufflers, disconnect the battery for about 15 minutes (if the bike had been running leave it disconnected until it cools down fully). This allows the ECM to establish a new baseline, within its adaptation parameters.

I have two 7/8" holes in each aft plate (in line with the false pipes); resulting in somewhat muted but pleasantly robust sound (a sort of deep base hum at cruising speed) with no flat spots, and noticeably (seat'o'pants) enhanced response performance. 'Sorry, no dyno data - just experience (and subjective impressions). Even riding two-up, it'll out-accelerate the dozen or so other 1800s (even solo ridden) in our riding group. Top (indicated) speed has been 134-5mph; GPS indicated 126.7mph. It's a 2001, non-abs, which has had the ECM change and head/coolant check (no issues found).

I cannot verify the above statement. If you find out the statement about the ECM is docucmented, please let me know where.
 

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Muffler sounds

I seem to remember someone on the board that drilled their pipes and found out the holes were too big and the bike didn't run right after. I think they said they had to close off (?) number of holes. Don't remember how many or how big they said they were. Good luck.
 

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Discussion Starter #5
I brought my pipes into work with me tonight. My friend and I drilled the baffle not the pipe. We welded a 7/8 inch hole saw onto a 1/2 inch rod that was about 3 ft long. I think that this will achieve the sound that I 'm looking for. I appreciate all of the information that you guys have given me. Won't know what they will sound like until I get home in the morning and install them. This mod was very easy to do. After I removed the three 8mm bolts that hold on the exhaust tips. We placed the pipes on a table ( covered in shop rags to prevent scratching of chrome ) in our maintenence shop. We drilled the baffle from the exhaust end not the inlet. As we were looking at the construction of the pipes we found out that if you drill from the inlet end you will completely miss the baffle.
When we stuck our rod in from the inlet side of the pipe it would completely go all of the way to the other end and hit the housing just below the exhaust outlet. Just by reading some of the replies that I have received. I think that some of the guys that haven't had success modifying the pipes were going about it the wrong way. There is only one baffle in the pipe to drill. Hope this works, if not I'll order the Torq Masters. Thanks again for your input.
 

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I would have to see a dyno to believe it.

I don't think messin with the stock pipes will get you what you want.You just will get noise,maybe you want noise.This is a long haul bike,I will bet a 200 mile trip the drone will be like chinese torture,and you will jump off the bike.I did it with the Valkyrie. Had the wheel jumping off the ground in 2nd,walking all my pals,but lost 5mph at the top.Didn't make a hoot about roll on's at 55 or 60.You need some back pressure.How much? I don't know just got to play with it.But I feel if you get a set of tune exhaust you may get the best of both worlds.I would give Viking a call they had some perty imperssive dyno's with their pipes on the F6.They may make a pipe for the Wing,I not sayin they are the best,but high quality and backed by dyno's. good luck my friend
 

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Discussion Starter #7
Viking doesn't make any pipes for the GL1800. I have talked with them previously and they only offer pipes for the VTX and the Valkyrie. Another thing I know what kind of bike the is. If I didn't I would not have bought it. Just because you had a bad experience with a set of pipes doesn't mean that I will. I don't mean to sound like a jerk or anything. I like to ride just as much as anyone and I 'm not a show off. If this works for me and I don't see any change in the performance. I just saved myself over $400. My thing is why not try it first. If it doesn't work then buy the aftermarket pipes. I can always make an insert to put back into to the stock pipes to return them to their original status because of the way that I drilled the baffles. :sw1:
 

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Drilled

I drilled mine. A 1/2" hole in each side. I the cut two pieces of Stainless, drilled a small hole in each & mounted them beside the 1/2" holes. When my wife wants a little more quiet, I just loosen the screw, slide the stainlees "damper" over the hole & now I stock again.
I've had NO problems with permormance at all.

:yw1:

DangerousDan
 

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Discussion Starter #9
Finally got to ride bike today. Pipes sound good and can't tell any change in bike performance.
 
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