Awhile back someone posted about the plug in the exhaust. Some said they didn’t have a hole under the plug. I pulled mine out and sure enough it looked like there was not a hole. Turned out it was carbon packed in so tight it looked like steel. I scraped at it with a screwdriver for a while and it broke through. Carbon poured out of it like sand through a funnel. About a cup to a cup and a half fell out. I expected a little but that really surprised me. What would cause that much carbon? Running to rich? What effect would that have had on the performance? I’ve had an overheating problem. Would that much carbon build up in the exhaust have anything to do with it or is the carbon a result of the overheating.

Thanks for the help.

 

storeing ur vehicle without driving it for a while builds up carbon.. instead of backfireing it collected in ur hole so to say LOL... i gues

 

MDG, how in the world did you manage to get that plug out!, feels like mine is welded on, ive tried every thing except heating it

 

Same story with my P650 exhaust. About a month ago (it had about 700 miles on it at the time), I pulled the plug on the stock exhaust pipe and it looked plugged up/no hole. I cleaned out the hole by poking it with a screwdriver and then some additional carbon came out...but it was definitely NOT a whole cup or more of carbon. Its probably a good idea to rev up the motor with the plug out so that additional carbon will be blown out.

MDG,
How many miles do you have on your quad? I'm just wondering if you had so much carbon b/c it has a lot of miles on it since you last cleaned the carbon from your exhaust pipe. As a teenager (years ago), I recall having a Honda 200S three-wheeler and the maintenance schedule required that I remove a small plate on the end of the exhaust (similar to the plug on the P650 exhaust) and then rev up the motor to blow out the carbon build up. Apparently, this is a common maintenance item from what I understand. That being said, I have no idea what causes the carbon to build up in the exhaust pipe.

Happy trails...[img]i/expressions/face-icon-small-smile.gif[/img]

 

All that being said , whats up with aftermarket pipes. why are there no carbon drains? Is it because there is less restrition in the design???

 

Nightryder
It was tight but came out with just a wrench. Had to put some back into it though. It is a brass fitting.

Mikey
I only have about 600 miles. I've never cleaned it though. I did start it and rev the engine. A little more came out but not like when I broke the plugged part. I'm not exagerating though. It was over a cup.

 

I removed my plug with a pipe wrench. The hole was closed with metal.I took a punch & poked it open.Started the bike & carbon poured out.Drove the atv for awhile & it seemed to run much better.It sounded better.I decided to leave the plug out.That was 500 miles ago. Maybe I could start a fire, but haven't yet.Runs like a scalded dog.Unless someone thinks I'm hurting the bike I'm leaving it out. Brushog

 

So all stock exhausts need to have the bolt taken out and the machine ran with it out to clean it? I've never cleaned one before[img]i/expressions/face-icon-small-blush.gif[/img]

 

Hey, so all you do is take out the plug and take a screw driver and get out the carbon and start it up and more shoulld come out. And that really affect your performance?

 

yep thats all you do. i did it to my quad awhile back when i had my stock pipe. it does affect your performance because all that carbon is blocking your exhaust flow.