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VT700 front cylinder runs lean

This is a discussion on VT700 front cylinder runs lean within the Shadow forums, part of the Honda category; Hi-I'm new to this forum. I have an 84 VT700C that has a low speed lean condition on the front ...


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Old 05-13-2010   #1
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Join Date: May 2010
Location: Slidell, LA
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Default VT700 front cylinder runs lean

Hi-I'm new to this forum. I have an 84 VT700C that has a low speed lean condition on the front cylinder only. I have not been able to solve this since I bought the bike 6 years ago. I have been through that carb many times thinking that there is trash somewhere, but I'm now convinced that's not the problem. Has anyone had a similar issue before? Thanks for the help.

Scott
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Old 06-26-2010   #2
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Originally Posted by bluoval6 View Post
Hi-I'm new to this forum. I have an 84 VT700C that has a low speed lean condition on the front cylinder only. I have not been able to solve this since I bought the bike 6 years ago. I have been through that carb many times thinking that there is trash somewhere, but I'm now convinced that's not the problem. Has anyone had a similar issue before? Thanks for the help.

Scott
Scott, you do not say if your shadow has dual carbs or not, if it does, then try this, believe it or not, MANY rider friends of mine have had this stuff remove damnnear every issue regarding fuel problems, "Seafoam" that is it's actual name, and using a full bottle through 3 tankfuls WILL fix 95% of fueling problems! if it is a single carb, then it HAS to be that your valves are out of spec on one head, and if an intake valve only opens 1/2 way, and the other one opens 100%, then the same problems will surface. Try
the Seafoam first though.
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Old 06-29-2010   #3
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Thanks for the reply. My Shadow is a dual carb setup. I have already ruled out valve problems or anything external to the carb, I verified cylinder is pulling vacuum and compression is great. I thought about Seafoam (used it before in other vehicles), but I have already run a high-quality fuel system cleaner (BG 44K) through it. We use this product at the shop where I work (Ford dealer service dept.). Also, I pulled the carbs off again and replaced the isolators between the carbs and heads. I noticed that the butterfly on the suspect carb is gouging the bore on the outside and is visibly moving to the side as the throttle is opened. I think this may be a large part of my problem. Unfortunately, since the bore is already noticeably gouged, I'm afraid I'll have to replace the carb eventually. Thanks for the input.

Scott
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