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For sure quieter, but at the expense of flow no doubt. Likely less of an issue for your riding style if you're staying at lower rpm's.
 

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Discussion Starter #242 (Edited)
For sure quieter, but at the expense of flow no doubt. Likely less of an issue for your riding style if you're staying at lower rpm's.
I use gas mileage logs as my indicator of performance efficiency as they record differences too sutble to be felt. TOCE mufflers are way oversized. The dual cores are the same diameter as the ones they use for 600cc sportbikes. That's why TOCE exhausts are so freaking L O U D. :eek: The combined cross section area of the necks of the funnels on the dual inner inserts are larger than the head pipe exit, so there's no flow restriction.

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And they exactly match the area of the two exits.

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I'm enjoying the option to have my exhaust nice and quiet whenever I want. :)

This is the sound of first gen dual inner and outer inserts.


The 3rd gen inserts are WAY quieter as I'm continuing to refine the design. :) When the weather clears up I'll post a sound video of the latest version of inserts.
 

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Discussion Starter #243
This is the 3rd generation quiet inserts. :)


Regular riding, no full throttle. The GoPro attenuates the sound so you can't tell on the video, but in real life the exhaust is WAY more quiet than before. So now I'll be doing gas mileage tests to see how the latest configuration works compared to the others.
 

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Discussion Starter #244 (Edited)
Oooh... the Kepspeed aluminum rear swing arm arrived today. :)

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The arm including all of the mounting hardware weighs only 5 pounds 3 ounces.
WAY lighter than the stock steel swingarm.
When everything is apart I'll weigh the stock one to log the weight reduction. I'll bet it will be a BIG difference. :)

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Really nicely machined chain adjusters.
WAY better than stock ones.

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Precision needle bearings.
WAY better than the stock rubber bushings.

The price was right, too... $110. Shipping from Belgium added another $27. Not too bad for $137. :)
 

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Discussion Starter #245 (Edited)
I shortened the DingerBuilt intake just to see what happens. It's still longer than any other intake sold as I make far better use of low rpm torque than high rpm horsepower. the pipe consists of a 180 degree "U" section out of the throttle body, then a 90 degree "J" section extending laterally across the engine to the other side. The engine now pulls strong from 3,000 rpm without lugging. While it ran good before with the longer intake, compared to how it runs now I know the tuning was too low and out of the stock cam's torque curve. The filter tucks nicely inside the fairing. I added a stainless steel shroud to keep wind from blowing directly on the side of the filter. This way dirt and grit doesn't hit the filter surface directly and the engine pulls in calmer less turbulent air.



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The Winter gas mileage average has been established at 125 mpg, while the Summer gas mileage averaged 145 mpg. This is a difference of 14%. Air cooled engines are more sensitive to ambient air temps than liquid cooled. In California we also have different Summer and Winter blend gasolines, but I'm not sure how much difference they make. I don't yet know the effect of the intake change but I'll find out after a few fill ups.
 

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Discussion Starter #246
Installed a Kepspeed aluminum rear swing arm yesterday...

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...and rode it today. I live in the middle of a canyon with one winding road to town so I'm going around curves more than I'm going in a straight line. The rear of the bike feels solid and dialed in and it doesn't feel like it's "waggling" in the curves like the stock swing arm. In my opinion it's an incredible deal at only $137 shipped from motorkit.com.

It has three advantages:

Precision swing arm needle bearings instead of bushings
Four pounds lighter than the stock rear swing arm
Includes accurate easy to adjust billet chain adjusters
 

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Discussion Starter #247
The combination of Kepspeed aluminum rear swing arm, IXIL exhaust and an aluminum rear sprocket alone knocked off a total of 11 pounds from the stock weight.

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With all of the other mods the bike now weighs 208 pounds.
 

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Discussion Starter #248 (Edited)
The original rear tire was close to the wear bars at 7,500 miles so I replaced it with a Kenda 140/70-12 street tire. The weight difference between the worn 130 and the new 140 was 8.75 pounds and 9 pounds.) so it's likely a new 130 and140 would both be quite close in wieght. Diameter difference was 58.5 inckes for the worn 130 and 62 inches for the new Kenda 140. Allowing for the wear difference, the 140 will gear the bike up by about 5%, which is totally fine as my engine has plenty of low rpm torque to pull the higher gearing. :) I'll check how the speedo reads with my gps equipped camera.

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I think it looks neato. :)
 

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Discussion Starter #249
Well, since I put a 140 on the rear, I went ahead and put a 130 on the front. :)



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Will be interesting to see if any discernible difference in fuel economy but sounds like tire weights were comparable so perhaps not.
 

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Discussion Starter #251
The Kendas are lighter than the stock tires so the weight difference is slight. I'm really curious to see how the fuel economy works out as now I'm geared up by about 5 to 6%. It's similar to putting a 16T on the front. Took it for a test ride and I can definitely feel the higher gearing. I'm going faster and the enginer is turning slower. The engine makes really good low rpm torque so this isn't an issue for me. I really need to make a gps embedded video with my gopro so I can see how the speedo reads with the big tires. :)
 

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Discussion Starter #252
My trip from the gas station ran 9.1 to 9.2 miles with the 130. It's now 8.8 miles with the 140, for a difference of 5%. So that's the odometer correction for gas mileage calculations. :)
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