Stalls with scorpion

After recently hearing that Tomcat has a similar problem to me, I thought I'd open it up to the org.

We both have scorpions fitted, and on a cold start, occasionally the bike will stall. Both have only noticed this happening after fitting the exhausts. Both have the tell tale signs of a minor air leak.

I suspect this is to do with the fuel/air ratio being a little below the magic number, and revs being low when first turning the music factory on.

Mine's a pointy, Tomcat's is a curvy, so FI vs carbs theory is out the window straight away.

Anyone found similar issues? I've been considering getting it on a dyno with F/A rig to have a peek at it, but it doesn't really bother me that much to be honest, so I haven't as yet done anything about it.

Just a curiosity.

Hmm, mine's been doing this every now and again for a while too, only got standard anchor/can still on (K5 pointy). Seems to happen both when cold and warm (eg. just after filling up at petrol station), it definitely feels like a fuelling problem, you can feel it dieing but giving it more welly just doesn't keep it alive till it dies.

Not convinced the end can is relevant - would back pressure (or lack thereof) really make that much difference? After all they start up without a can at all quite happily. Dunno, I am mechanically curious but incompetent (a dangerous combination!)

Originally Posted by MiniMatt

Hmm, mine's been doing this every now and again for a while too, only got standard anchor/can still on (K5 pointy). Seems to happen both when cold and warm (eg. just after filling up at petrol station), it definitely feels like a fuelling problem, you can feel it dieing but giving it more welly just doesn't keep it alive till it dies.

My car used to do similar to that. Especially if it'd be run for a short distance, then stop for a few mins to get fuel. Refused to start sometimes too.

That was the fuel pump. Obvious sign on that was it cutting out if you took a right hand bend too tight.

Never had any problem with my Scorpion(s)
I have heated grips and used to ride a lot around town, so tend to make sure the idle speed is set at no lower than 1400, which might make a difference