VT500 bogs down, no matter how much gas I give it - Honda Shadow Forums : Shadow Motorcycle Forum

adventurer2112 · 03-30-2012, 04:25 PM

Hi All 85 VT 500 - 45 minutes city driving fine. Fill tank.
Then doing 70-75 fine for 25 miles or so, then
No matter how much gas I give it. Smoked a bit. Keeps slowing down.
Pulled over, died, wouldn't start. Waited 20 minutes hard to start, then started
Down the road & bogging again. How do I tell between coil ~ CDI ~ gas flow problem. Out on side of road right now.
TIA
Jack

adventurer2112 · 03-30-2012, 05:49 PM

Coolant tank 1/3 full, but radiator dry. Water
Shot out on leg, wasn't hot. Tank looks split.
Think the coils for running
Jack

Lukeduck · 03-30-2012, 05:56 PM

I would lean toward fuel. Sounds like maby running real rich (choke out?) and fouled plugs. Was it smoking from both sides? 20 mins. to start, sounds about like the right time for flooded engine to recover. That's the best I got. Hope you made it home OK. Good luck, and don't forget to check the simple stuff first.

Lukeduck · 03-30-2012, 05:59 PM

You may want to disregard my previous post. Radiator empty changes the game. It's a tough engine, it may well survive overheating. Just gotta find out why. Good luck.

adventurer2112 · 03-30-2012, 09:30 PM

Hi All. Will check plugs later. Took coolant tank protector off.
Tightened reservoir cap, put old rad cap back on, now leaking at
top hose going into radiator. Putting screw clamp on that connection.
Still thinking a hot coil. Pine sol Ed carbs, but may have to take it apart.
TIA
Jack

adventurer2112 · 03-31-2012, 10:54 AM

HI All,
Got home safe, driving the bike, YAY ! Cooling system not leaking right now. Right pipe smoked a little bit, maybe 15 or 20 seconds.
Will clean gas tank vent pinhole, and hose, will check petcock and it's screen.
Will spray around carbs and tighten the screw bands, if needed. Moved carb vent hose to under seat, already installed a new gas filter.
I have already run 3 cans of Berryman's B-12 thru the gas tank. Right after B-12, starts right up 1 or 2 5 second pushes on starter, idles smoothly. Now hard to start, won't idle, and will die if not being revved up. The 2 easy plugs look good.

Ok OK, have to clean the carbs, I am nervous about taking them apart.
Love riding my bike, not so happy with troubleshooting.
Tickled pink
Jack

MizzenMast54 · 03-31-2012, 12:19 PM

glad you and the bike were able to get back home, lets see some more pics

adventurer2112 · 07-05-2012, 12:01 PM

HI All,
Since this post, changed out engine, new coils installed, flushed coolant system, swapped water pump, installed AGM battery for a 700. Idle wont hold, and a n oil leak, bu tridable
Jack

03-30-2012, 04:25 PM	#1 (permalink)
adventurer2112 Senior Member Join Date: Sep 2011 Location: SC, but travel a bit. Posts: 137	VT500 bogs down, no matter how much gas I give it Hi All 85 VT 500 - 45 minutes city driving fine. Fill tank. Then doing 70-75 fine for 25 miles or so, then No matter how much gas I give it. Smoked a bit. Keeps slowing down. Pulled over, died, wouldn't start. Waited 20 minutes hard to start, then started Down the road & bogging again. How do I tell between coil ~ CDI ~ gas flow problem. Out on side of road right now. TIA Jack __________________

03-30-2012, 05:49 PM	#2 (permalink)
adventurer2112 Senior Member Join Date: Sep 2011 Location: SC, but travel a bit. Posts: 137	Coolant tank 1/3 full, but radiator dry. Water Shot out on leg, wasn't hot. Tank looks split. Think the coils for running Jack __________________

03-30-2012, 05:56 PM	#3 (permalink)
Lukeduck Senior Member Join Date: Sep 2011 Location: Ontario, Ca. Posts: 479	I would lean toward fuel. Sounds like maby running real rich (choke out?) and fouled plugs. Was it smoking from both sides? 20 mins. to start, sounds about like the right time for flooded engine to recover. That's the best I got. Hope you made it home OK. Good luck, and don't forget to check the simple stuff first. __________________ Come to terms with the ass that bears you/ 07 CB250/ 07 1100 Spirit with Velorex sidecar

03-30-2012, 05:59 PM	#4 (permalink)
Lukeduck Senior Member Join Date: Sep 2011 Location: Ontario, Ca. Posts: 479	You may want to disregard my previous post. Radiator empty changes the game. It's a tough engine, it may well survive overheating. Just gotta find out why. Good luck. __________________ Come to terms with the ass that bears you/ 07 CB250/ 07 1100 Spirit with Velorex sidecar

03-30-2012, 09:30 PM	#5 (permalink)
adventurer2112 Senior Member Join Date: Sep 2011 Location: SC, but travel a bit. Posts: 137	Hi All. Will check plugs later. Took coolant tank protector off. Tightened reservoir cap, put old rad cap back on, now leaking at top hose going into radiator. Putting screw clamp on that connection. Still thinking a hot coil. Pine sol Ed carbs, but may have to take it apart. TIA Jack __________________

03-31-2012, 10:54 AM	#6 (permalink)
adventurer2112 Senior Member Join Date: Sep 2011 Location: SC, but travel a bit. Posts: 137	HI All, Got home safe, driving the bike, YAY ! Cooling system not leaking right now. Right pipe smoked a little bit, maybe 15 or 20 seconds. Will clean gas tank vent pinhole, and hose, will check petcock and it's screen. Will spray around carbs and tighten the screw bands, if needed. Moved carb vent hose to under seat, already installed a new gas filter. I have already run 3 cans of Berryman's B-12 thru the gas tank. Right after B-12, starts right up 1 or 2 5 second pushes on starter, idles smoothly. Now hard to start, won't idle, and will die if not being revved up. The 2 easy plugs look good. Ok OK, have to clean the carbs, I am nervous about taking them apart. Love riding my bike, not so happy with troubleshooting. Tickled pink Jack __________________

03-31-2012, 12:19 PM	#7 (permalink)
MizzenMast54 Member Join Date: Nov 2011 Location: NYC Posts: 46	glad you and the bike were able to get back home, lets see some more pics __________________ Shadow 84 vt500c

07-05-2012, 12:01 PM	#8 (permalink)
adventurer2112 Senior Member Join Date: Sep 2011 Location: SC, but travel a bit. Posts: 137	HI All, Since this post, changed out engine, new coils installed, flushed coolant system, swapped water pump, installed AGM battery for a 700. Idle wont hold, and a n oil leak, bu tridable Jack __________________

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