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post #1 of 7 (permalink) Old 01-31-2010, 04:15 PM Thread Starter
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86 vulcan 750

hey everyone. im in portugal cove newfoundland . anyway i took off the carbs and took out the jets and the main was full of old crap thanks for the help.but looked into the rear cylinder intake theres a lot of carbon in there whats the best way to get it out? bacon
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post #2 of 7 (permalink) Old 01-31-2010, 05:12 PM
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Use a couple ounces of Seafoam in every tank of fuel, it will clean out the carbon.


85 VN700 "Old Yella"

REBUILT ENGINE
CUSTOM PAINT
VANCE & HINES CRUZERS
EAR SHAVED AND RE-JETTED W/K&N'S
DUNLOP ELITE K591 FRONT & REAR
VOLTMETER
SYNTHETIC BRAKE FLUID
SYNTHETIC OIL & GEAR LUBE
PLEXISTAR 2 WINDSHIELD
SPLINES LUBED
ACCT'S GREASED W/TOC SPRINGS
COASTERD
LEATHER SADDLE BAGS
LEATHER TOOL AND ROLL BAG
PICKUP COILS GAPPED AT .018"
NGK CAP, WIRES, IRIDUMS
BARNETT FRICTION PLATES & SPRINGS
CUSTOM GRIPS, MIRRORS, LEVERS
ORIGINAL STATOR & R/R 14.5v
DEKA MF AGM ETX15L

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post #3 of 7 (permalink) Old 01-31-2010, 06:59 PM
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Quote:
Originally Posted by bacon View Post
hey everyone. im in portugal cove newfoundland . anyway i took off the carbs and took out the jets and the main was full of old crap thanks for the help.but looked into the rear cylinder intake theres a lot of carbon in there whats the best way to get it out? bacon

Did you happen to look into the front cylinder intake, and if so, did the rear cylinder have more buildup? Keep in mind that on an older bike, there is going to be some buildup, especially if it was used for a lot of stop and go riding, and started often with the choke on. Also, things can look worse than they are. It is normal for it to be black in there. Remove the plugs, and with a tiny little flashlight, look into the cylinders and see what the top of the pistons look like.

Aside from that, how does the bike run? If it runs good, then I agree, just start putting Seafoam in the gas, that will help clean it out. If it runs poorly, or is pinging (detonation), there may be so much carbon in the combustion chamber that it has raised the effective compression ratio. If that is the case, you may need to actually remove the heads and clean it up.


I would suggest hotter plugs, but if you decide to do that, you are on your own. I don't know what your riding conditions are, and plugs that are too hot tend to burn holes in pistons. Jerry.

I am a motorcyclist, NOT a biker.


1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike
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post #4 of 7 (permalink) Old 02-01-2010, 04:58 PM
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Welcome to the Vulcan madness, bacon. It`s always good to have another Canuck on board. WE may be in the same county, but are probably farther apart than either one of us is from most of the Yanks/or Rebs on the board here. I think Ft. McMurray in northern Alberta, has the biggest population of Newfies anywhere outside of Newfoundland.

I hope a couple of ounces of Seafoam in every tank of gas is all you need to clean the carbon out after you get the carbs back on.

See the link below, and pay particular attention to the rear spline lube, a MF-AGM battery and NGK Iridium spark plugs. Enjoy the ride.

Gordon

1991 VN 750 -"Cosmic Lady" or "Bad Girl"?
Purchased May 16, 2008
Approx.19,300km (12,000 miles)

H-D windshield
Relocated R/R
MF-AGM battery
Fiamm Freeway Blaster horns
F&S luggage rack and engine guard
Kury Offset Hiway pegs
July 13, 2016, Riding on the DARKSIDE now, Classic Radial 165/80-15


TOP TEN THINGS A NEW RIDER/OWNER SHOULD DO. Click on link.
https://www.vn750.com/forum/11-vn750-general-discussion/9127-top-ten-items-you-would-suggest-new-owner-do-his-new-ride.html
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post #5 of 7 (permalink) Old 03-06-2010, 07:07 AM
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Hello, I've been to Portugal Cove, nice place.
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post #6 of 7 (permalink) Old 03-07-2010, 10:09 PM
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Hello,
I have read in here in a number of forums. Where can you buy this Seafoam? At the motorcycle shop? So it's pretty good stuff to clean out the carbon build up?
I just took apart my Rebel 250 03' with only 3900 miles on it. I did a compression check on it and one cyl. was low. So I did a valve adj. on it. It still came up low...To make sure ,my friend also did it to make sure. Still low. I don't normally like to let friends borrow any of my motorcycles but did for 2000 miles worth. I got it back and noticed the oil a bit low. So I figured the rings went bad. I know only 1 cyl. was low and why not both. I also thought maybe carbon build up on valves. Get to the point already... ok.
Tore top end apart and one cyl. had carbon build up so valve wasn't closing all the way. Was wondering if the seafoam would have cleaned up enough before I decided to tear it apart? Thanks now.
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post #7 of 7 (permalink) Old 03-08-2010, 09:54 AM
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SeaFoam is available at many auto parts stores and the local Walmart. This should answer your questions about what it will do. http://www.seafoamsales.com/

Many here have used it and are true believers.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
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