Delkevic Exhaust (ST1100)

I have had Delkevic s/s silencers fitted to my ST11 for a few years.
They look and sound great, especially if I remove the 'optional' baffle :)
 
I'll admit I'm new to the ST game , but not to motorcycles ........ The '92 I just bought has a set of Delkevic 18" cans.
Here is my question:
Why is no one re-jetting after this install? my bike runs good but a lot of "popping" on decel , indication of lean on pilot jet / pilot air scew.

Thanks
 
I went with oversize pilot and main jets, and a nice set of adjustable tapered needles.

Works good, mileage good, power excellent, no popping.

Not rocket science. Not for everyone.

Running stock filter housing with KN drop in air filter and 14 inch slash cut round Delkevic cans with baffles installed.

It's real nice to have military wartime throttle available.....
 

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lomita said:
I went with oversize pilot and main jets, and a nice set of adjustable tapered needles.

Works good, mileage good, power excellent, no popping.

Not rocket science. Not for everyone.

Running stock filter housing with KN drop in air filter and 14 inch slash cut round Delkevic cans with baffles installed.

It's real nice to have military wartime throttle available.....
Click to expand...
What did you go to for jet sizes?
 
Fitted the Delkevic exhaust to my ST1100 about six months ago as a replacement to the stock exhaust due to the stock collector box being rotten. Personally I don't like the Delkevic silencers as they are loud when riding slow through town etc, for me they spoil the ST1100. Wish there was something more in the same line as the stock exhaust which could be fitted.

Dec
 
Gr8lite said:
What did you go to for jet sizes?
Click to expand...

Before you change jets, I would try opening the pilot screws a quarter turn each and see if the condition prevails. (Popping)

I will be pulling my carbs soon for inspection and can tell you what jets are installed.

PM me if you have further questions.
 
lomita said:
Before you change jets, I would try opening the pilot screws a quarter turn each and see if the condition prevails. (Popping)

I will be pulling my carbs soon for inspection and can tell you what jets are installed.

PM me if you have further questions.
Click to expand...
I have not even ventured under the pretty red skin yet ....... can the pilot screws be accessed without pulling the carbs?
And Thank You very much !
 
Dec said:
Fitted the Delkevic exhaust to my ST1100 about six months ago as a replacement to the stock exhaust due to the stock collector box being rotten. Personally I don't like the Delkevic silencers as they are loud when riding slow through town etc, for me they spoil the ST1100. Wish there was something more in the same line as the stock exhaust which could be fitted.

Dec
Click to expand...
There may be a possibility that you could repack them with a better glass packing...... do you know that yours have the dB killers installed?
 
They just have the alloy baffle that can be removed. Once you remove the screw at the end of the silencer you can then slide the baffle out etc. I might actually contact Delkevic and ask them if they have anything that can quite them down a little, if so this would be a big improvement.
 
Gr8lite said:
I have not even ventured under the pretty red skin yet ....... can the pilot screws be accessed without pulling the carbs?
And Thank You very much !
Click to expand...
Sure, if you have the special tool. It's a royal PITA. Someone might loan you the tool. The static adjustment of the pilot screws worked just fine for me. I simply loosened the clamps, popped the carbs loose, made the adjustment, popped the carbs back on. Got them where I wanted in short order. Started at 2.75 turns and only closed them after initial setup a quarter turn. Been running them 3 years without further adjustment.
 
Dec said:
Fitted the Delkevic exhaust to my ST1100 about six months ago as a replacement to the stock exhaust due to the stock collector box being rotten. Personally I don't like the Delkevic silencers as they are loud when riding slow through town etc, for me they spoil the ST1100. Wish there was something more in the same line as the stock exhaust which could be fitted.

Dec
Click to expand...
What rpm do you ride in town? Which Delkevic mufflers did you install?

My 14 inch Delkevic cans start singing pretty good by 3000 rpm. Ear plugs are a must for all my riding.

With my jetting, I can chug at 2000 rpm, but I avoid high manifold pressure low rpm conditions. Same as when flying.
 
Stylo Steve said:
Absolutly BEAUTIFUL!
Click to expand...
z I couldn't post the video of the exhaust. That is a full system. At the time I was living in Denver near the distribution center for Delkevic. They hooked me up. I went with the tri-ovals. I wanted to stick with a similar look. I kept the baffles in. Sounds much better. DSC_0191.jpg
 
Dec said:
Fitted the Delkevic exhaust to my ST1100 about six months ago as a replacement to the stock exhaust due to the stock collector box being rotten. Personally I don't like the Delkevic silencers as they are loud when riding slow through town etc, for me they spoil the ST1100. Wish there was something more in the same line as the stock exhaust which could be fitted.
Dec
Click to expand...
Can the stock silencers still be used with the Delkevic exhaust pipes?
 
Uncle Phil said:
John - They list the pipes without cans on their website. I just can't tell if the stock ones would fit on their headers....
Click to expand...
My guess is they would, based on the picture and their example of their VFR pipes and OEM cans.

Thankfully, my system is still in good shape, even after 28 years.

John
 
Dec said:
Fitted the Delkevic exhaust to my ST1100 about six months ago as a replacement to the stock exhaust due to the stock collector box being rotten. Personally I don't like the Delkevic silencers as they are loud when riding slow through town etc, for me they spoil the ST1100. Wish there was something more in the same line as the stock exhaust which could be fitted.

Dec
Click to expand...
You might be lucky and drop on some secondhand Motads. They are advertised on ebay fairly regularly. They're not as quiet as standard but near enough.
Upt'North.
 
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