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Hot Pipe Photos

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Hot Pipe Photos

PostAuthor: Hellgate » Sun Oct 29, 2017 6:11 am

My friend owns a Piaggio, Aprilia, Moto Guzzi, Norton dealership. He recently had the new Aprilia Shiver 900 V2 on the dyno to compare to the old 750 V2.

Thought y'all might enjoy. Oh, and this is normal on the bike with a single wall exhaust. Not the dreaded, "lean condition." Whatever that is.

ImageImageImage

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Re: Hot Pipe Photos

PostAuthor: Jake » Sun Oct 29, 2017 6:37 am

That screams " DO NOT TOUCH ! ".
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Re: Hot Pipe Photos

PostAuthor: eslmatt » Sun Oct 29, 2017 7:48 am

What color paint is that? :bg:
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Re: Hot Pipe Photos

PostAuthor: mark75 » Sun Oct 29, 2017 2:11 pm

nice, photographic evidence of condition normally unseen d/t sunlight and reflective surfaces.

that's the new 'Crylot' color - "Radiation Rouge" .... :naughty:
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Re: Hot Pipe Photos

PostAuthor: 1stone0f8 » Sun Oct 29, 2017 4:57 pm

That screams " DO NOT TOUCH ! ".


"go ahead, touch me! you know you want to... come onnnn, touch meee!!" :tf:

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Re: Hot Pipe Photos

PostAuthor: Hellgate » Sun Oct 29, 2017 5:37 pm

He says this is very common on bikes that have an air injection system to burn, unburned, fuel. This is required for the cats, otherwise they clog up. When tuning he closes the air injection, and adds bungs on each pipe for high speed O2 sensors. Typically he removes much more fuel from the fuel map than he adds. He used steady state tuning at either 250 to 500 rpm increments vs a sweep test. This allows the O2 sensors and the 4 Gas EGA to get a good accurate reading. As he goes through the process he gives the bike a "break" several times before moving to higher levels. The whole process takes a while. But the tune is spot on. Much more power, smooth and much more fuel efficient.

We used that process on my XV920R. We ran into the limits of the Hitachis!

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Re: Hot Pipe Photos

PostAuthor: Hellgate » Sun Oct 29, 2017 5:43 pm

Oh, and he runs massive fans for the radiators, oil cooler, and the entire room changes air over 12 times a minute! In the winter it gets freaking cold!

I need to take my bike back in on a cool day to verify the tuning changes he recommended 2 years ago. He moved the store and the dyno had been off line for 18 months.

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Re: Hot Pipe Photos

PostAuthor: eslmatt » Mon Oct 30, 2017 3:26 am

Hey Hellgate: you were also on the oil cooler thread. http://viragotechforum.com/viewtopic.php?

If you do get a chance to dyno the bike, would you mind checking the engine temperature? See if your highly tuned engine is running hot in general? Perhaps try some different fan speeds?
1984 VX750 Japanese special - stolen - RECOVERED
build thread -> http://viragotechforum.com/viewtopic.php?f=32&t=58187&sid=e4ab82933609aa211c1efb06cf000508

2010 Jailing 110 customized

Image
When asking how, also tell me why.

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Re: Hot Pipe Photos

PostAuthor: Hellgate » Mon Oct 30, 2017 5:51 am

It runs within normal ranges. The dyno is not the place to lower the fan speed. Oil coolers don't don't add that much to the overall cooling. These are air cooled motors afterall.

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