1993 VT 1100 engine performance issues - Honda Shadow Forums : Shadow Motorcycle Forum

viper1 · 11-24-2012, 07:05 PM

Hi to all forum!!

i am long long away from the States(Europe) but i am driving a 1993 California model shadow.The one with the canister but i have removed canister,tubes and valves.So here is my problem.Bike starts ok,idle is ok but during driving when i open the throttle instantly the engine stalls.When the throttle opening is progressive revs go up normal. I have cleaned and balanced carbs,checked the plugs and swap fuel pump with another one but with no results.Have you any idea?

luisr320 · 11-24-2012, 07:29 PM

Hello friend. I'm inEurope too, in Portugal, to be more precise. Where are you?
Have you tried to run the engine without the air filter?

John Hopkins · 11-24-2012, 08:40 PM

I don't think you can just remove the evap control system without changing the carbs or at least linking the hoses from the purge control valve..I would bet that is where your problem lies, but I have never removed one on my bikes and I haven't examined the system enough to help you..

John.

viper1 · 11-24-2012, 09:14 PM

Quote:

Originally Posted by luisr320

Hello friend. I'm inEurope too, in Portugal, to be more precise. Where are you?
Have you tried to run the engine without the air filter?

My location is in Athens Greece and concerning the filter i have not driven with out it installed but i will try

Thanks for the reply

viper1 · 11-24-2012, 09:18 PM

Quote:

Originally Posted by John Hopkins

I don't think you can just remove the evap control system without changing the carbs or at least linking the hoses from the purge control valve..I would bet that is where your problem lies, but I have never removed one on my bikes and I haven't examined the system enough to help you..

John.

Hi John
i had the same problem before deactivating the evap system.I have connect all the vacuum lines so there are no leaks.Is there any chance the fuel pump does not deliver the correct amount of fuel on sudden demands?

Scrapdog2grand · 11-24-2012, 09:36 PM

I would say no on the fuel pump.
did you check your vacuum diaphrams for holes while you had the carbs apart, is there a vent with a sub air filter for the vacuum diaphams?

viper1 · 11-24-2012, 09:48 PM

Quote:

Originally Posted by Scrapdog2grand

I would say no on the fuel pump.
did you check your vacuum diaphrams for holes while you had the carbs apart, is there a vent with a sub air filter for the vacuum diaphams?

Checked all diaphragms and were ok.I am not aware of any sub air filter.If there is any where is located?Inside the carbs?

finjoey · 11-24-2012, 10:11 PM

PM Sent

vonh · 11-27-2012, 03:03 PM

I'm not sure about the evap. control system and have concerns there too. But it sounds like your flooding your carbs on quick acceleration, try leaning your mixture out a bit or re-jet for a leaner mixture

viper1 · 11-28-2012, 04:39 AM

i am worring about the accelerator system of the carbs but i will try to lean it from the pilot screw.It is the only thing i didn't touch when i disassempled the carbs for cleaning

11-24-2012, 07:05 PM	#1 (permalink)
viper1 Junior Member Join Date: Jan 2010 Posts: 11	1993 VT 1100 engine performance issues Hi to all forum!! i am long long away from the States(Europe) but i am driving a 1993 California model shadow.The one with the canister but i have removed canister,tubes and valves.So here is my problem.Bike starts ok,idle is ok but during driving when i open the throttle instantly the engine stalls.When the throttle opening is progressive revs go up normal. I have cleaned and balanced carbs,checked the plugs and swap fuel pump with another one but with no results.Have you any idea?

11-24-2012, 07:29 PM	#2 (permalink)
luisr320 Senior Member Join Date: Jun 2010 Location: Lisbon, Portugal Posts: 519	Hello friend. I'm inEurope too, in Portugal, to be more precise. Where are you? Have you tried to run the engine without the air filter? __________________ Honda VT750C 83 Full Restoration Log Photo compilation (5 minutes video) Riding my Honda VT750 to the marina (14 minutes video)

11-24-2012, 08:40 PM	#3 (permalink)
John Hopkins Senior Member Join Date: Sep 2011 Location: Tredegar,South Wales, near England, not far from Scotland. Posts: 3,480	I don't think you can just remove the evap control system without changing the carbs or at least linking the hoses from the purge control valve..I would bet that is where your problem lies, but I have never removed one on my bikes and I haven't examined the system enough to help you.. John. __________________ Beauty is only skin deep but ugly goes right to the bone.

11-24-2012, 09:36 PM	#6 (permalink)
Scrapdog2grand Senior Member Join Date: Sep 2011 Location: New Jersey Posts: 1,503	I would say no on the fuel pump. did you check your vacuum diaphrams for holes while you had the carbs apart, is there a vent with a sub air filter for the vacuum diaphams? __________________ 1999 VLX 1998 SA750 2003 SA750 http://www.cycleterminal.com Motorcycle Terminals, Connectors,Relay Kits, Accessories, Wiring diagrams. Site still under construction.

11-24-2012, 10:11 PM	#8 (permalink)
finjoey Member Join Date: Oct 2012 Location: Baltimore Maryland Posts: 77	PM Sent

11-27-2012, 03:03 PM	#9 (permalink)
vonh Senior Member Join Date: Aug 2012 Location: Squamish,B.C Posts: 202	I'm not sure about the evap. control system and have concerns there too. But it sounds like your flooding your carbs on quick acceleration, try leaning your mixture out a bit or re-jet for a leaner mixture

11-28-2012, 04:39 AM	#10 (permalink)
viper1 Junior Member Join Date: Jan 2010 Posts: 11	i am worring about the accelerator system of the carbs but i will try to lean it from the pilot screw.It is the only thing i didn't touch when i disassempled the carbs for cleaning

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