VMax Engine stalls when idling
in [Yamaha]
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From: Albrecht via MotorcycleKB.com on 13 Aug 2007 23:19 192837465 wrote: >gasoline takes at least 6 months to start going off Not where I live. The high temperature in my garage will be 100 degrees every day from Memorial Day until the end of September and my carbs will plug up in about three weeks. -- Message posted via MotorcycleKB.com http://www.motorcyclekb.com/Uwe/Forums.aspx/yamaha/200708/1
From: Dave H. on 14 Aug 2007 15:40 "Albrecht via MotorcycleKB.com" <u33665(a)uwe> wrote in message news:76919e6b15f7d(a)uwe... > Dokta wrote: > >Has anyone seen or heard of this and if so, what's the fix? > > Hehe. It sounds like you think that engine stalling is somehow unique to V- > Maxes and you expect a recall on that model to fix a design problem. > > All constant vacuum (diaphragm type) carburetors have very small idle jets, > idle ports and idle passages. > > If you don't ride the bike at least once a week, the gasoline in the > carburetors will start evaporating and the evaporated gasoline leaves gum and > varnish behind to plug up the idle ports and passages and the engine will > stall when it's warm. > Nah, they all do that ... my '90 'Max gets ridden most days in the summer, regularly in the Cold English Winter, short hops to the shops or work, 500 mile rides to friends in other countries, it never gets hot enough to boil off the volatile fractions in the petrol, and it still stalls if I set the idle too low! Worse is the infamous "VMax hot start problem", so that when it does stall, the battery's not up to cranking it back up... usually in town in front of cute young girls :o( -- Dave H. (The engineer formerly known as Homeless) "Rules are for the obedience of fools, and the guidance of wise men" - Douglas Bader
From: Albrecht via MotorcycleKB.com on 14 Aug 2007 16:46 Dave H. wrote: >Worse is the infamous "VMax hot start problem", so that when it does stall, >the battery's not up to cranking it back up... usually in town in front of >cute young girls :o( What kind of "engineer" can't tweak a carburettor and solve an "infamous" problem? -- Message posted via MotorcycleKB.com http://www.motorcyclekb.com/Uwe/Forums.aspx/yamaha/200708/1
From: 192837465 on 17 Aug 2007 00:40 "Albrecht via MotorcycleKB.com" <u33665(a)uwe> wrote in message news:76a9c306df8b6(a)uwe... > 192837465 wrote: > >>gasoline takes at least 6 months to start going off > > Not where I live. The high temperature in my garage will be 100 degrees > every > day from Memorial Day until the end of September and my carbs will plug up > in > about three weeks. > Stop buying gasoline made from recycled peanut butter
From: Dave H. on 20 Aug 2007 07:30
"Albrecht wrote... > >Worse is the infamous "VMax hot start problem", so that when it does stall, > >the battery's not up to cranking it back up... usually in town in front of > >cute young girls :o( > > What kind of "engineer" can't tweak a carburettor and solve an "infamous" > problem? > > -- Well, really I'm an electronics and comms engineer, so the hot-start problem was easy enough (sensibly sized battery cables made up with a hydraulic crimper from t'office plus a fork-lift battery connector under the dummy tank on 25 sq mm cables for jump-starting, charging etc. ), and the idle's set right now :o) PS it's not a "tweak the carburettor", that's all fine, it's a "tweak the linkage, there's an adjustable stop" -- Dave H. (The engineer formerly known as Homeless) "Rules are for the obedience of fools, and the guidance of wise men" - Douglas Bader |