Question about 2006 Yamaha Road Star Silverado

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2006 Yamaha Roadstar Silverado, Installed Roadburner Street Pro exhaust system and Dyno-jet stage one kit,now the rear cylinder keeps fouling out! Any suggestions??

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Sounds like jetting is to rich, recheck settings and fuel height settings, need to get the fuel mixture correct as that bike will develop other running issues due to carbon build up in the rear cylinder. check out www.roadstarclinic.com as this is a good source for information on this bike

Posted on Feb 04, 2010

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What is the best aftermarket exhaust for the 2007 Roadstar 1700 how and what to do to get the most out of this bike. What is the best air kit to use


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Hi Brian, running on the lean side, exhaust and or intake leaks, exhaust valves not seating properly, retarded timing, and extended periods of high speed driving all contribute to exhaust pipe discoloration. This is another reason why heat shields are installed on pipes to cover normal discoloration. You might be able to slow the process down or halt it completely by increasing main jet size until you achieve a light tan color on your spark plugs. The down side of larger main jets is lower MPG. In the future if you ever install new pipes, there is a commercial product out there called Dyno Kote that can be installed on the inside of the new pipes to greatly reduce bluing. There is also a company named Hard Krome that sells a double walled exhaust system that guarantees pipes and mufflers not too blue. Finally, there is a commercial product called Blue-Job that can remove bluing if properly applied, but also removes a micro thin layer of chrome, so only use this product once a while. If you have any other questions about exhaust pipe bluing, or any other issues your Electra Glide may be having you can reach me at xlch@mail.com. For more information about your question, please visit the websites below. Good luck and have nice day.
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I would check if it still has stock jets. you need stage 1 or 2 dyno jet kit. To get best out of that upgrades also look for any vacum leaka

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I have a yamaha xj650 maxim which was a project of mine and it will not idle below 2500 rpms. There have been many add ons though 4 to 1 exhaust free flow air filters clean carbs added stage 3 dyno jet kit...


I would recommend adjusting the idle screw on the carb. If it is not the idle adjustment, then check the choke as it may be sticking and that will cause the engine to idle at that rate.

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want a great source for roadstar information? try roadstarclinic.com. you might have a sticking exhaust valve in the rear cylinder! they are known for it when they have the pipes and jet kits installed! if that be the case, I have a fix for it that is a lot cheaper than pulling the heads!

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The dealer is not interested.
The bike is set up very lean to meet emissions standards. Any of them will benefit from larger jets. It's probably running too lean.

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No it will not. You probably don't NEED to rejet at all. If the manufacturer suggests it for your bike and pipe combination I would follow their advice. If they do not suggest it I would use a dyno to get the best performance from your new setup. Keep in mine your new exhaust only lowers the back pressure. You haven't changed the intake parameters at all as far as airflow. So any additional air going into the cylinders due to your new exhaust will only be because of the reduced volume in the cylinder while the intake valve is open. This is a rather small amount, so don't get all crazy and jump several jet sizes at once.

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With the key off and the engine "running down", the idle circuit fuel is still going to into each cylinder then out the exhaust. A hot spot in the exhaust can ignite the unburned fuel creating an explosion, ( backfire ). Let the engine run down to an idle THEN turn the key off.

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Mar 31, 2009 | 2006 Yamaha Road Star

1 Answer

I have a 2006 Yamaha Roadstar midnightstar 1700.. it runs fine after it warms up most time. But the problem is it acts like it is missing or flooding out while riding after you take off with in the first...


Sounds like it may be over jetted, and running alittle rich. Can you see black smoke if you rev it up? Could be misadjusted floats after the kit was installed.

Mar 07, 2009 | 2006 Yamaha Road Star

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