D+D Exhaust for EFI Enfields

[boggy]

I'll tell you that the faster I go the further off my (AVL) speedo is and it's definitely off by 10 by the time I hit 60 indicated.  I've seen it hit 80 and there is no way in hell I was doing more than 65.  I'm pretty sure the Enfield speedos only measure how fast it FEELS like you are going.  Nifty tech.

[Ducati Scotty]

Mine's within about 5mph near the top, so 85 was probably more like 80.

I'm pretty sure the Enfield speedos only measure how fast it FEELS like you are going.  Nifty tech.

Indeed, how do they do that?

Scott

[72westie]

All stock 2010 C5. Whatever Avon tires they come with. I will go check the graph and see the MPH it topped out at.

[eda1bulletc5]

Any sound clip with this new exhaust system?
Would be good to know...
Thanks!

[motorat]

sound would be great...also when are these available to order.....my time frame is about 3 months..depending on how many classes i get to teach

[Hobbydad]

I check my speedo against my GPS whenever I have a chance. At lower speeds (under 50), it's off by a solid 5 mph, but at higher speeds (over 60) it's only off by 2-3 mph dependably. I cruise at 80 on the eway all the time and can exceed that speed without coming anywhere near the rev limiter. The highest indicated that I've ever hit was 90 mph, and I believe it was within that 2-3 mph diff. My bikes a slightly modified 2011 C5 (complete Hitchcock exhaust, K&N cone, 19T, and at least a 50# diet of missing steel).



(I have since fabbed up a 750cc+ intake tube between the filter & TB, after reading Ace's comments on intake plenums in another thread.)

[FiRE Comms]

(I have since fabbed up a 750cc+ intake tube between the filter & TB, after reading Ace's comments on intake plenums in another thread.)

Do you have a pic of the TB tube?

[Bulletman]

I check my speedo against my GPS whenever I have a chance. At lower speeds (under 50), it's off by a solid 5 mph, but at higher speeds (over 60) it's only off by 2-3 mph dependably. I cruise at 80 on the eway all the time and can exceed that speed without coming anywhere near the rev limiter. The highest indicated that I've ever hit was 90 mph, and I believe it was within that 2-3 mph diff. My bikes a slightly modified 2011 C5 (complete Hitchcock exhaust, K&N cone, 19T, and at least a 50# diet of missing steel).



(I have since fabbed up a 750cc+ intake tube between the filter & TB, after reading Ace's comments on intake plenums in another thread.)

The bike looks really nice.

[Hobbydad]

Do you have a pic of the TB tube?

I know what you're thinking, "Holy Clamps!", but this was the initial mock up. All but 2 of the clamps have been removed and the pieces have been gorilla glued together. The only piece I couldn't show you was inside the airfilter itself. It's a belled conduit piece which looks exactly like a velocity stack. It was a PITA getting the belled end inside the filter and I don't think I could physically pull it out again. Everything I bought can be picked up a local hardware store. It's all been cut down, recontoured, ect., but the pieces are basic plumbing/electrical stock. The airfilter now sits on the left side, right behind the battery box. It's a full 2" from reducer to reducer, and I measured the volume it holds with water.

[FiRE Comms]

wow, and I was hoping to be able to replace the toolbox w/ a pancake filter...  hmm back to the drawing board, thanks for the parts list...  Have you noticed improvements w/ this setup?  Thanks... chris

[ADB]

I ordered the straight slip-on today from D&D, they said it would be shipped out sometime late next week.
After i get it, i'll post some pictures and get a video so you guys can hear how it sounds.

[Ducati Scotty]

Can you please try to get a 'before' video with the stock setup for comparison?

Thanks,
Scott

[ADB]

Will do.

[eda1bulletc5]

Wonderful that will be very helpful!!
Thanks
Sajiv

[hortoncode3]

I, personally, think the sales success of pod filters totally depends on the perpetuation of urban legend..that they help performance based on some nebulous "figures" supplied by some word of mouth..
I have had a few bikes now that have been retrofitted with pods (not by me) and they all sucked. Not until I returned them to near stock and/or changed the carbs to something a little more modern did actual performance return to some acceptable road worthy condition..
I suppose if a very narrow band of performance is needed, as in racing and the like,  pods MAY be acceptable.. but for everyday commuter type conditions..forget it...even normally forgiving Japanese bikes are nearly impossible to get right, I can't imagine how an RE would act outside of EFI.