Coked up exhausts

[Bishbash]

OK, this might be a really easy question to answer, but I cant think how to do it. Had a search, but nothing showed up.

How do you clean out\up coked up exhausts?
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My current bikes are - YZF-R1 & GS 500 E

Trackday videos - https://www.youtube.com/user/bishbash13

[dobby]

oxy accetelene torches get it red hot inside then turn off the accetelene so its jus oxygen flowwing through it... there will be a lot of smoke and a few nice bangs n is cleared when there is no more smoke

[Bishbash]

That's a welding torch right? Wont that damage the cans?
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My current bikes are - YZF-R1 & GS 500 E

Trackday videos - https://www.youtube.com/user/bishbash13

[27cows]

The most common method is to stop up one end, then fill the pipe with caustic soda mixed in cold water. Leave for a few hours, then carefully drain the CS out...and a large quantity of crap from within the pipe will come with it.
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The RXS100: vehicle of choice for Chuck Norris

[el_oso]

i have used oven cleaner or caustic soda before. check the label before using as most will eat aluminium. using it for exhaust may be a problem depending on what bike it is for
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Duke 390
Previous: '05 XR125L | '96 XJ600S Diversion |'05 Suzuki GSXR1000 | '05 Honda CBR125-R | '97 YZF 600R Thundercat | '11 Honda CBR250
Car: Jeep Wrangler 4.0L

[Bishbash]

Well it is for a couple of my bikes, my R1 is coked a small amount, my GS is coked up a bit and the girlfriend's VFR is coked up so much, that when she parked it in front of a wheelie bin and started it up, it left black marks over the bin!

Looks like caustic soda is the way forward, will give that a try!
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My current bikes are - YZF-R1 & GS 500 E

Trackday videos - https://www.youtube.com/user/bishbash13

[mr rip]

I normally use a blow torch & an air line

get the exhaust nice & hot so the coke inside starts to smolder & there's smoke coming out of it then blow a slow & steady stream of air through it

if you got it hot enough there will be shed loads of smoke come out of the end & you'll hear a rummbling sound from inside the pipe as the coke burns off
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never criticise a man until you've walked a mile in his shoes, then when the muck hits the fan you'll be a mile away & you'll have his shoes

[ZRX61]

[Wafer_Thin_Ham]

[Bishbash]

Hmmm, well the R1 has just a small amount of soot in the cans, but the VFR is pretty bad as I explained. Using normal 95 Unleaded.


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My current bikes are - YZF-R1 & GS 500 E

Trackday videos - https://www.youtube.com/user/bishbash13

[el_oso]

possibly time to have a look at the carbs on the VFR as it is quite probably running rich. either that or you are leaking oil. how is the oil usage
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Duke 390
Previous: '05 XR125L | '96 XJ600S Diversion |'05 Suzuki GSXR1000 | '05 Honda CBR125-R | '97 YZF 600R Thundercat | '11 Honda CBR250
Car: Jeep Wrangler 4.0L

[Bishbash]

Definitely no oil leaks, the oil use is normal. The carbs running rich is a good possibility as I had to change the last set of carbs due to missing parts.

So, I guess it is time to find out how to balance carbs properly, as I expect that job in a garage is over £100?


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My current bikes are - YZF-R1 & GS 500 E

Trackday videos - https://www.youtube.com/user/bishbash13

[Walloper]

Just cause there's soot in the exhaust doesn't mean they are choked. I ruined a lovely pair of white slacks when I was stood standing behind my brothers Firestorm one day..

Normal running, start-up, ticking over in traffic et cetera will produce a certain amount of soot from unburned fuel and sacrificed engine lubrication. But proper use of the machine will burn this off by heat and the gas flow through the exhaust system.

How is the performance?

Do these machines have a high mileage? I'm sure you wouldn't need to bother with anything under 100k. If high miles then maybe the engines need overhaul.

Short Commutes will be the worst treatment though.

I would take the bike out the back (roads) and kick it's fucking cunt in for about half a tank.
You will resolve most issues of that sort of carbon/slobber build up that way.

But if you think it will help: https://www.boots.com/en/Boots-Caustic-Soda-500g_923900/?CAWELAID=334516099&cm_mmc=Shopping%20Engines-_-Google%20Base-_---_-Boots%20Caustic%20Soda%20500g


https://www.seafoamsales.com/
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W-ireless A-rtificial L-ifeform L-imited to O-bservation P-eacekeeping and E-fficient R-epair

[Bishbash]

R1 is 100% with 160000 miles

GS is running about 75% with 40000 miles, it's my commuter, don't really care about it.

VFR has 40000 miles and this is the performance;

Ignore the clutch slipping at 90 mph, that was me trying to make it do more.

https://www.youtube.com/watch?v=Vn89-Fid3Kw
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My current bikes are - YZF-R1 & GS 500 E

Trackday videos - https://www.youtube.com/user/bishbash13

[Robby]

The VFR is an NC24, no?
I had my old one dynoed years ago, and it was running very rich despite a clean air filter and no good reason to be rich.

Carb balance is unlikely to be the problem, carb wear or settings out is more likely. The correct way to sort it is to remove the carbs, strip and clean and check and set every component as it should be, or replace jets and needles to be sure.
The realistic way to sort it is to ignore the rich running and sooty can, it's an NC24. It'll self destruct in a few months anyway.

4 strokes shouldn't need decoking. On an NC24, with a fragile collector box made of rust and hate, I wouldn't want to disturb the exhaust at all if I could avoid it.

[m0l0t0v]

[Walloper]

160k is geriatric.
It's still putting out power as the fuel system is compensating.

Rings and valve overhaul will sort it.

Or a 1/2 gallon two pack overhaul (with an oven baked cure) and a set of decals off ebay and punt it to some unfortunate unsuspektur.

That was a race track you were on? Yes?
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W-ireless A-rtificial L-ifeform L-imited to O-bservation P-eacekeeping and E-fficient R-epair

[Bishbash]

[cloric_tzr]

[Bishbash]

[cloric_tzr]

too true
not to be discriminate tho some girls do like it fast.
dirty bitches
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i dumped my girlfriend the other day! she wouldnt act out one of my fantasy's. all i wanted her to do was come home from work, catch me fucking her sister and join in!!! miserable bitch!
My wifes so ugly, the only thing that goes down on her
Is the internet connection.

[Walloper]

[el_oso]

[Walloper]

[cloric_tzr]

maybe you will get to experience this one day. after you hit puberty and grow up of course[/quote]

Thanks for your input DAD..... [/quote]

haha very funny as it happens im 22 in all probability boned more women than u hence y u couldnt catch the joke an felt the need to have a little jibe. just to rub it in mate i knobed my 18 year old gyal this mornin an theres a very god chance i will again tonite. gota make the most of the good side of the month although if u want to see a fresh 18 yr old bobin up n down i know some good porn sites u can try? up 2 u.
how old are u?
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i dumped my girlfriend the other day! she wouldnt act out one of my fantasy's. all i wanted her to do was come home from work, catch me fucking her sister and join in!!! miserable bitch!
My wifes so ugly, the only thing that goes down on her
Is the internet connection.