Pointy fuel/engine issue

[yorkie_chris]

Originally Posted by BlackFlag94

I've had no issue at all with smell, pops/bangs (although I know these are to be expected a little with aftermarket exhausts), 'cutting out' briefly since changing the plugs but have only done 20 miles.

Solved then?

Hopefully... would seem weird that all these problems were just from needing new plugs. Just gonna sit it out for a couple of hundred miles and see if it happens again.

I checked that the coils were connected and they are, two seperate coils that are electronically connected ?!

Also took off the airbox to have a look inside, apart from finding a leaf the filter was pretty clean, took the filter out and had a look on the underside and there was a circular scorch mark on the underside. I think it was the front cylinder... Surely that isn't normal?!

[yorkie_chris]

If plug is crap sometimes it will spit back through the throttle body.

Yes 2 coils, 2 separate cylinders... is not like a car with distributor.

[jambo]

Originally Posted by BlackFlag94

The rear plug went in all the way until needing to be nipped with a socket, the front did a sort of tight loose tight (the white part of the plug was mud coloured hence I feel the need to get myself a fender extender)

Can you double check this?

If the front plug isn't tightening properly, then it's possible the last one was loose. It's also possible the thread in the front cylinder head is not OK, in which case the problem may well come back.

Jambo

I just started to take the bike apart to check out various things that I've been advised to check such as seals between the cylinder and throttle bodies and to see if the butterfly valves operate at the same time for example and just give the bike a general going over to check everything is tip top.

In this link is a couple of pictures of things that I have found which I don't believe should be how they are and there is a video of the butterfly valves operating. Please just give them the once over and advise me on anything you can...

http://s1300.beta.photobucket.com/us...ry/SV650S%20K3

[Bibio]

what are you trying to ask?

do the top butterflies (STV) move when you start the bike?

do the top butterflies (STV) move when you rev the bike?

if answers to above are yes then yes that is what happens.

I've been told to check out the throttle body balencing and seeing if I could tell by looking at the butterfly valves.

They do both of those things you mentioned.

Also, the bike is still doing the misfiring thing at low revs where the engine has a slight pause where it doesn't have fuel or air going in. It feels like it isn't sparking but they're brand new plugs.

I just don't know what else could be causing this problem. Need someone to ride it for a few hundred miles and get their view on the issue. I thought it was slower but got 141 indicated earlier so don't think it is down on power

[Bibio]

a TB balance requires the use of vacuum gauges.