twin exhaust

[jonnyboy750]

hi all been thinking about a twin exhaust (one each side) got a spare set of down pipes to play with just wondering how inportant is the collector box on these bike . I no you can put strate through pipes on cars .

[lootch67]

Don't have one but I think the AT looks fab with twin zortsts. Exhibit 1 your honour... This one doesn't look like it has a collector box.

[futter]

Why bother? added weight and an increase of 100% of damaging the pipe if you have to lay it over!

[tramp]

yeh !!!

let alone trying to balance the exhaust back pressure, back in the days of "proddy racing" my mates old Z900 had a custom exhaust and the pipes had all to be the same lenght.

The one in the picture arent as the ycurly under the swing arm.

[Kjell Lindberg]

Equal length of header pipes is more essential if engine uses cams with great overlap. Africa Twin engines have a very mild overlap.

David Vizard have written many interesting books on this subject.
The matter of equal exhaust pipes lengt should not need to prevent you from trying.

Install a set of torque rings, or as they sometimes is refered to: "D"-rings just after the exhaust ports in the beginning of the pipes.

[craigrevo]

Don't have one but I think the AT looks fab with twin zortsts. Exhibit 1 your honour... This one doesn't look like it has a collector box.

off topic but the engine gaurd looks awesome.

[rudirudeie]

Time to give this thread a bump.

I have searched the forum but could only find this and another topic (Dual Exhaust for Africa Twin) which didn't give me a conclusive answer to the questions I have, so I thought why not try asking again...

I too am looking into making a dual exhaust on my AT RD07.
Who can give me some advice on the following things that came to mind:

1. Do I need smaller end-cans?
I presume that my current Laser Produro end can is optimized for the flow of the 750cc of my cylinders. If I go for two end cans, should I need 2 endcans that are each optimized for the flow of 375cc or would using 2 produros (if I just buy another one) be fine?

2. For the best flow, would it be better to split the pipes in two after the 2-1 collector (so it becomes a 2-1-2 system) or should I run 2 equal length separate pipes, straight from 1 cylinder to 1 silencer?

My reasons for doing this are pure for aesthetics, but if there could be a power gain (or at least no or just a minimal decrease) I would like to take that into account with de design.

[MadM]

Hello!

I would like to know the answer to these two questions to if it is possible. Though I do not own AT yet, dut to local laws preventing me from riding bikes that have more than 35kw(48bhp), i now ride Kawasaki KLE 500 and would like to do twin exhaust just because I like the look of twin pipes on enduro bikes. So if anyone can shine some light on this i would be very gratefull.

Thanks, MadM!

And a pic of my ride, I hope I didn't break any forum rules by posting pics of another bike.

[dogwheel]

If it's just for cosmetic reasons, why not fit the second end-can and a dummy link pipe, without making any connection to the engine? That way you could avoid spoiling the bike's performance yet still achieve the "look" you desire.

[lowflyer]

I seem to recall someone doing this and turning the " duff " silencer into a large tool tube
Don't know how it would affect the balance etc