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post #1 of 5 (permalink) Old 07-22-2013, 05:41 PM Thread Starter
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Performance and Bike Lean

I have been dealing with idle and hot starting issues for a while. I have noticed that my bike idles better sitting vertical than it does on the side stand. Also I have noticed that if I lean the bike to the right the idle picks up for a while and then sometimes bogs down. Sometimes on the side stand the rear cylinder cuts out. Are the idle changes normal or does this point carb issues?

Thanks in advance.

94 with @ 8500mi
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post #2 of 5 (permalink) Old 07-22-2013, 05:53 PM
..have a vulcan good day!
 
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Originally Posted by trsm4 View Post
I have been dealing with idle and hot starting issues for a while. I have noticed that my bike idles better sitting vertical than it does on the side stand. Also I have noticed that if I lean the bike to the right the idle picks up for a while and then sometimes bogs down. Sometimes on the side stand the rear cylinder cuts out. Are the idle changes normal or does this point carb issues?

Thanks in advance.
First thought: Check your Float Levels...and wouldn't hurt to Seafoam the fuel system.
Second: Also, Turning of bars RPM changes are sometimes the throttle cables becoming too taunt....re-route/free-up cables if necessary.
Third: Pick-Up Coil Mod is highly recommended to resolve Hot Start issues.


'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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post #3 of 5 (permalink) Old 07-23-2013, 01:18 AM
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Quote:
Originally Posted by WilliamTech View Post
First thought: Check your Float Levels...and wouldn't hurt to Seafoam the fuel system.
Second: Also, Turning of bars RPM changes are sometimes the throttle cables becoming too taunt....re-route/free-up cables if necessary.
Third: Pick-Up Coil Mod is highly recommended to resolve Hot Start issues.

x2

My first thought was the floats in the carb as well as the throttle cables. Stand the bike up and move the handle bars side to side to see if this triggers the change in idle speeds. If so, that might be the worst of it. lube up the throttle cables and see if that solves it. If not, move on to check the float levels.

as for the hot starting, the pickup coil mod is a good idea.

Also, what spark plugs are you running? Iridiums may help with the hot starting as well if you don't already have them.

......I'd rather wake up in the middle of nowhere then in any city on earth.

*2014 VN900 Custom (16,200 miles and counting)
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post #4 of 5 (permalink) Old 07-23-2013, 02:46 AM
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The sidestand to vertical is fully normal. Its due to the way the CVK carb works...whenever tuning and tweaking, make sure the bike is on the centerstand or vertical....

Also, if your oil level is too high, it can quell the spark on the lower pickup coil....some here refuse to believe it, but its true....I check my oil on the sidestand, and bring it just barely to top...that way when its vertical, should read about 3/4....those marks, H and L....mean "high and low"....theres NO need to ever bring the oil level all the way up to "H".....thats just stupid...some refuse to believe that.....



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post #5 of 5 (permalink) Old 07-23-2013, 05:25 PM Thread Starter
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I put my bike on the center stand and the oil level was up to the H mark with no air showing. i drained till it should about half. It hard started and then after a while idled just fine. I'm thinking my hot starts were really from side stand starting after filling with gas. Thanks Wolfie, I would never have thought to check the oil level.

94 with @ 8500mi
AGM Battery
Willie and Max sm. slant bags
Memphis Shield
Splines lubed
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