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post #1 of 40 (permalink) Old 12-11-2006, 12:07 PM Thread Starter
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Yesterday afternoon, while riding with my buddy(owns a Road King). I found myself cruising along at 90 mph. He decided to take off and show me what the harley could do and not being the kind of guy who likes to eat dust,I went after him. Well I stopped the pursuit at 105 mph on the speedo when the carbs started to cough. .........Ok I know not too smart but these things happen.

Question is.....has anyone else experienced this type of carb action at high speeds? The bike runs fine at all other times and I really have not accelerated to such a degree very often.
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post #2 of 40 (permalink) Old 12-11-2006, 12:14 PM
 
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80 was my limit...getting old lol
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post #3 of 40 (permalink) Old 12-11-2006, 12:20 PM
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I routinely cruise at 75 -80 (speedo says?) and hit 85 - 90 during a pass.
Don't know how much more it has?

Jon

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post #4 of 40 (permalink) Old 12-11-2006, 01:03 PM
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I have done 111 mph (120 indicated)..if your carbs are pooping out you might want to check the air vent hose in the right ear, use some seafoam, and get some iridium plugs. Could be bad gass also...

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post #5 of 40 (permalink) Old 12-11-2006, 01:09 PM
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Quote:
Originally Posted by artman View Post
Yesterday afternoon, while riding with my buddy(owns a Road King). I found myself cruising along at 90 mph. He decided to take off and show me what the harley could do and not being the kind of guy who likes to eat dust,I went after him. Well I stopped the pursuit at 105 mph on the speedo when the carbs started to cough. .........Ok I know not too smart but these things happen.

Question is.....has anyone else experienced this type of carb action at high speeds? The bike runs fine at all other times and I really have not accelerated to such a degree very often.
Real question is, where you gaining on him?

Jon

93VN750, under re-construction
vn750.com Member # 828

Rick's Stator and R/R
MF AGM Battery
Coastered
Degoated
Shaved & Jetted
Iridium's
MAC Tapered Staggered Pipes
Battery/Temp/Clock Gauge
Stainless Steel Brake Lines
Dunlop D-404's
23,XXX miles and holding pending gasket change (underway!!!)
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post #6 of 40 (permalink) Old 12-11-2006, 01:15 PM
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115mph is about the tops FLAT OUT For a standard 'UK MODEL' (8,500rpm) if you have no faults, and especialy if you have after market pipes etc. I WOULD SUGGEST HAVING THE BIKE DYNOJETTED THIS WILL SET IT UP PERFECTLY FOR EACH CYLINDER(AS THERE ARE SLIGHT DIFFERENCES BETWEEN CYLINDERS) AND ALL REV. RANGES. MAKE SURE YOU FIND A GOOD FIRM TO DO IT AS THEY VEARY.
WELL WORTH THE MONEY.

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EDALBRIS

1952 NORTON (MODEL ONE) 'BIG 4'
1955 NORTON DOMINATOR 88/99 CAFE RACER
1981 KAWASAKI Z1000ST SHAFT
1988 KAWASAKI VN750 (UK) HARDTAIL + 5"
1988 KAWASAKI VULCAN 750 (US)

ALL TIME WISHLIST BIKES
1939 BROUGH SUPERIOR SS100 GRAND ALPINE SPORT
ANY 1940ish NORTON WITH CS1 ENGINE
A RIDE ON A NORTON NEMISIS 'A'
NEVER HAD A CAR LICENCE AND HOPFULLY NEVER WILL

Last edited by EDALBRIS; 12-11-2006 at 01:17 PM.
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post #7 of 40 (permalink) Old 12-11-2006, 01:23 PM Thread Starter
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[QUOTE=93VN750;22784]Real question is, where you gaining on him?
Hell yes !!!!! Thats what really hurt
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post #8 of 40 (permalink) Old 12-11-2006, 02:39 PM
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I've only had mine up to, as indicated by the speedo, 105, maybe 110.
I didn't really want to spend too much time looking at anything other than the road at that speed.
Felt like the bike could've had a little more in it, but not much. Although it didn't start coughing or spuddering.

This is one reason I don't really want anything more than what the Vulcan has, power & speed wise. If I know the bike will do it, I'll probably try to do it. That got me no drivers licence for 12+ years when I first started driving a car.
(never even had a chance to re-new my first licence )


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Aim for the apex."

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post #9 of 40 (permalink) Old 12-11-2006, 03:11 PM
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i hit 115 with a huge windsheild on. never experiance the carb issue... sounds like they may be draining... try the gas vent hose. also try some sea foam

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post #10 of 40 (permalink) Old 12-11-2006, 05:26 PM
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Do you think it's possible your rpm's were at a point that the rev limiter kicked in and caused the sputtering?
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