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Carbs and Fuel System
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post #1 of 24 (permalink) Old 08-19-2008, 10:34 AM Thread Starter
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still not right...

ok, so, here's the situation...
What I have done:
I had cleaned the carbs in mid may. I removed the goat and drilled the mufflers. I marbled the two hoses behind each air filter, and then tried to adjust the pilot screws to get them right.

Here are the ongoing problems-
--the bike is a dog at 70+mph compared to before degoat.
--exhaust smells like fuel
--backfires on decel still
--gas mileage is still around 42-45 mpg.


what's up with the bike? I am going to be checking the spark plugs today and then fixing the bezel lights, and putting the ACCT back in instead of the MCCT while I await your professional opinions!
Jeremy

'99 VN750 with 8900 miles and growing (3,111 when I bought it 03-22-08)
Ear shave with Unipods
Drilled mufflers and degoat
TOC springs
N/C Street shield EX windshield
Jumbo Saddleman Highway Studded saddlebags
Willie and Max Saddlebag mounting kit
License plate turn signals
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post #2 of 24 (permalink) Old 08-19-2008, 10:56 AM
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If you marbled, you also need to block off the vacuum line running from the rear carb to the cannister. Did ya do that? May not be the main problem, but won't be helping anything if it's still open.
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post #3 of 24 (permalink) Old 08-19-2008, 12:02 PM
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When I was syncing my carbs this weekend (wow where they off! lol) I did notice if that vacum line was not plugged it ran like $#!* or stalled completly. Make sure even if you think it's capped, that it's still capped. Deffinatly worth a look.
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post #4 of 24 (permalink) Old 08-19-2008, 12:53 PM Thread Starter
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ok.. I will cap that. golf tee work alright you think? ok- how do I sync my carbs? can it be done with them in the bike?

'99 VN750 with 8900 miles and growing (3,111 when I bought it 03-22-08)
Ear shave with Unipods
Drilled mufflers and degoat
TOC springs
N/C Street shield EX windshield
Jumbo Saddleman Highway Studded saddlebags
Willie and Max Saddlebag mounting kit
License plate turn signals
Home made sissy bar
Luggage Rack from Scoop
http://youtube.com/user/99vulcan750
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post #5 of 24 (permalink) Old 08-19-2008, 12:59 PM
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Golf tees work fine. There's an article by Marty Ignazio on how to build a $1.55 manometer. I don't have the link here at work, but a search on the Forum should take you right to it.

C
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post #6 of 24 (permalink) Old 08-19-2008, 01:38 PM
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Quote:
Originally Posted by 99vulcan750 View Post
ok- how do I sync my carbs? can it be done with them in the bike?
Yes, it is done on the bike. The downloaded manual has a decent write up on it & Crobins365 has great labeled photo's in here gallery. I'm at work & this browser won't let me paste pics. Don't ask. Stupid "Yahoo".

Anyway, It's atleast easy to check if the carbs are in sync. You'll need a 7mm wrench to adjust them. If you look between the "V" of the engine on the bottom of the carb, the adjuster sets right in there. I STRESS, "Make small adjustments!!". If you adjust to much it can suck that oil out of the home made manometer faster that you can blink. Yup, I did it. Hey it was my first time. Good luck.
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post #7 of 24 (permalink) Old 08-19-2008, 01:40 PM
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Quote:
Originally Posted by Crobins365 View Post
build a $1.55 manometer.
Inflation!!! It cost me about $3. Damb economy. I can't hardly afford to breath! lol
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post #8 of 24 (permalink) Old 08-19-2008, 02:12 PM
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Quote:
Originally Posted by kanuck69
Inflation!!! It cost me about $3. Damb economy. I can't hardly afford to breath! lol
Cost me about $3 also.

The article that Cindy was referring to can be found HERE

I wound up using 3/16 ID tubing instead of the 1/8 that the article instructed. A little extra info about using the tool can be found at the end of my post HERE. As kanuck69 said, SMALL adjustments of the sync are key!

I picture of the tool I made is HERE

Good luck! Let us know how it goes.

Chris
Wayne, NJ
1989 VN750-A5
VROC #27781
-Replaced/Fused Stator & Replaced/Relocated R/R (15K mi.)
-MF Battery
-De-Goated/Re-goated
-Coastered
-Splines Lubed
-Stebel Nautilus Horn
-AutoMeter 2" VOM
-Silverstar Headlight
-Refinished Gauge Rings and Mirrors(Flat Black)
-Refinished Swingarm/Lubed Pivots
-K&S Turn Signals Clear Cover/Amber Bulb
-Kenda Kruz 110/90-19 front 170/80-15 rear
-Clear Alternatives LED tail light
-Plexifairing III
-Willie & Max Saddlebags and SissyBar Bag
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post #9 of 24 (permalink) Old 08-19-2008, 02:35 PM Thread Starter
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thanks! I capped the hose, and adjusted the spark plugs.. they were all white and gapped at a little less than .03 inches.. so I gapped them closer to .038 and .04. less back firing still slight but a little bit is fine by me. now to figure out why the Cam chain is still noisy after adjusting the MCCTS... then the carb sync...

'99 VN750 with 8900 miles and growing (3,111 when I bought it 03-22-08)
Ear shave with Unipods
Drilled mufflers and degoat
TOC springs
N/C Street shield EX windshield
Jumbo Saddleman Highway Studded saddlebags
Willie and Max Saddlebag mounting kit
License plate turn signals
Home made sissy bar
Luggage Rack from Scoop
http://youtube.com/user/99vulcan750
99vulcan750 is offline  
post #10 of 24 (permalink) Old 08-19-2008, 03:44 PM
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White means hot. Lean. Charb-e-quing.
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