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Old 10-26-2008, 09:31 AM   #16
DolphinJohn
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Quote:
Originally Posted by BIGISLANDMATT
.
Where's the 85 or 86 hp BMW claims?
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Old 10-26-2008, 02:34 PM   #17
AngryRed
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Nice, the Holeshot stainless looks like a winner. Very Staintune looking.
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Old 10-26-2008, 04:54 PM   #18
Bluebull2007
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All I did with mine was take out the catalystic converter. Made a HUGE difference, and its noiser now too.
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Old 10-26-2008, 04:59 PM   #19
DolphinJohn
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How did you reroute the exhaust?

I haven't looked that closely but were you able to use a straight piece in place of the c.c. ?
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Old 10-26-2008, 05:29 PM   #20
Bluebull2007
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Quote:
Originally Posted by DolphinJohn
How did you reroute the exhaust?

I haven't looked that closely but were you able to use a straight piece in place of the c.c. ?
Nay, I had it done by some pros. They left the shape the same, and just argon welded the hole closed again once it was removed. If you looked at it you wouldnt have noticed it was out.
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Old 10-26-2008, 06:57 PM   #21
* SHAG *
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Quote:
Originally Posted by DolphinJohn
Where's the 85 or 86 hp BMW claims?
Engine, not the wheel
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Old 10-26-2008, 07:02 PM   #22
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I totally knew that.... just testing you guys
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Old 10-27-2008, 04:33 AM   #23
Desert Dave
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Any of these pipes have spark arrestors? (USFS aprroved) Or at least something available?

Pretty important for riding national forest, yet most of the aftermarket seems to miss this. Not sure I want much more noise, but to shave some wieght an another pony or two couldn't hurt.
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Old 10-27-2008, 10:11 AM   #24
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I just talked to Graham at Leo Vince and he told me that
there is a spark arrestor available for the Evo II.
It's an insert for $49.95, easy mod.
The pipe won't have a USFS compliance stamp on it
because this pipe is in their street line.
It should be easy enough to see or feel with a stick or whatever.
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Old 10-27-2008, 10:15 AM   #25
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Quote:
Originally Posted by Desert Dave
........... Not sure I want much more noise, but to shave some wieght an another pony or two couldn't hurt.
With the removable silencer in, this pipe is not much louder than stock,
just a little deeper sound.
Also cool to the touch immediately. I can hold my hand on any part of it as soon as I get off the bike.
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Old 10-27-2008, 12:46 PM   #26
Bayner
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I wouldn't think a bike with a cat would need to have a spark arrestor also. Anybody know for sure?
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Old 10-27-2008, 03:10 PM   #27
Singletrack_mind
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Seems to me one of the principal virtues of an aftermarket can on this bike will be to allow home-made bag mounts to tuck in tighter; for instance with the Pelican cases where they aren't shaped to accommodate the pipe, or soft bags with some backing plates. The Holeshot pipe looks good in this regard.

As for removing the Cat; I figure this isn't a race bike, I don't need to get every last HP out of it, so as long as the energy's already been expended to remove those rare earth metals from the ground & turn them into a catalytic converter I'll let it do it's job cleaning up the emissions.

I'll be interested to know if having the cat negates a need for a spark arrestor.
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Old 10-31-2008, 06:04 AM   #28
kkug
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I just got a new GS 800. Has any one experienced a sloppy muffler hanger. Rubber Bushing ??.

Mine really seams to flop around a lot. I worry about it off road.
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Old 10-31-2008, 07:46 AM   #29
tmex
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I put the Akropovic (sorry no pic at this time) on my 8GS purely for aesthetics and, of course, the exhaust note. The dyno chart above confirms what I was told - not to expect meaningful performance gains. The Termignoni exhaust which I put on my Ducati certainly improved the aesthetics and exhaust note (stock exhaust on a Duc just does not sound like a Duc should sound), and it came with a different ECU chip that did seem to improve performance noticeably - seat of the pants impression.

It would be nice if BMW or the aftermarket provided a means to make ECU adjustments with a laptop, but looking at the dyno chart above I am not sure how you could make it much better than stock. Perhaps an OEM is prohibited from doing this in order to be sanitary with respect to emissions regulations for street legal vehicles.
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Old 10-31-2008, 07:56 AM   #30
tmex
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Quote:
Originally Posted by Desert Dave
Any of these pipes have spark arrestors? (USFS aprroved) Or at least something available?

Pretty important for riding national forest, yet most of the aftermarket seems to miss this. Not sure I want much more noise, but to shave some wieght an another pony or two couldn't hurt.
This issue is very unclear relative to what is actually required, and I have avoided trying to get a straight answer because I am afraid of what the answer might be. I would ask if a stock Jeep or Toyota has a spark arrestor? I have never known a street legal vehicle, unless it looks like a dirt bke, to be checked for an arrestor. When I ride my plated 400EXC into Hollister Hills OHV area in Cali, they just wave me on through (It does have a USFS approved arrestor BTW). Unplated bikes always get the rod poke test.

The stock exhaust on the 8GS is not labeled as certified to meet USFS spark arrestor requirements, and I do believe that a catalytic converter performs the same function (but have not heard or seen an official statement on this).

As a practical matter far more fires are started in Cali by brush contact with catalytic converters than by exhaust sparks.
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