88 vt800c issues - Honda Shadow Forums : Shadow Motorcycle Forum

tsickspeed · 11-30-2012, 10:37 AM

Ok, so here's the deal. When I first bought the bike it had a stumble when switching gears and getting on about half throttle around 3k RPMs. I noticed vacuum lines plugged and open vacuum Ports. It is a California model and had all the EGR LIKE components on the bike. I removed everything and capped the vacuum Ports that were associated to the California model. It ran wonderfully for about 2 weeks of daily driving.

It now falls on is face every once in a while and will backfire out the intake. Could this be a timing issue or something else?

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tsickspeed · 12-06-2012, 10:16 AM

Bump any ideas?

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jpr1968 · 12-06-2012, 02:00 PM

Sounds like a vacuum leak. What model bike?

tsickspeed · 12-07-2012, 11:37 AM

1988 Honda shadow VT800c, California model.

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vonh · 12-07-2012, 02:34 PM

I'd start by rechecking all the line plugging you did make sure it's all sealed up. Soumds like a leak to me too.

tsickspeed · 12-13-2012, 08:24 AM

Thanks, I'll start there.

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11-30-2012, 10:37 AM	#1 (permalink)
tsickspeed Member Join Date: Sep 2012 Posts: 31	88 vt800c issues Ok, so here's the deal. When I first bought the bike it had a stumble when switching gears and getting on about half throttle around 3k RPMs. I noticed vacuum lines plugged and open vacuum Ports. It is a California model and had all the EGR LIKE components on the bike. I removed everything and capped the vacuum Ports that were associated to the California model. It ran wonderfully for about 2 weeks of daily driving. It now falls on is face every once in a while and will backfire out the intake. Could this be a timing issue or something else? Sent from my N861 using Motorcycle.com Free App

12-06-2012, 10:16 AM	#2 (permalink)
tsickspeed Member Join Date: Sep 2012 Posts: 31	Bump any ideas? Sent from my N861 using Motorcycle.com Free App

12-06-2012, 02:00 PM	#3 (permalink)
jpr1968 Senior Member Join Date: Apr 2008 Location: Palatine, IL Posts: 4,644	Sounds like a vacuum leak. What model bike?

12-07-2012, 11:37 AM	#4 (permalink)
tsickspeed Member Join Date: Sep 2012 Posts: 31	1988 Honda shadow VT800c, California model. Sent from my N861 using Motorcycle.com Free App

12-07-2012, 02:34 PM	#5 (permalink)
vonh Senior Member Join Date: Aug 2012 Location: Squamish,B.C Posts: 202	I'd start by rechecking all the line plugging you did make sure it's all sealed up. Soumds like a leak to me too.

12-13-2012, 08:24 AM	#6 (permalink)
tsickspeed Member Join Date: Sep 2012 Posts: 31	Thanks, I'll start there. Sent from my N861 using Motorcycle.com Free App

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