riding in the rain

[mikojh]

I posted a week or so ago about a problem when riding in the rain after so long the bike would chug as if it is was running out of petrol, in 3rd and fourth gear, this only happens when it is wet it has now happened again this morning so it definently isnt a problem thats going to go away. Switching the fuel tap to reserve seemed to nullify the problem however i didnt try that this time round instead i just ragged all of gears. I have recently changed the spark plug as well. Not too sure what it could be. It also idles and starts perfectly and doesnt cut out just mass loss of power in 3rd and 4th gear.

Suzuki EN125

is it ever unheard of of buying a spark plug which is dodgy the problem seems to have been only since then as i remember one time coming in soaked and not having that problem on the old spark plug.

[doggone]

It's cheap enough to get another and a good idea to have a spare anyway.
I'd be suspecting insulation break down on HT lead (from plug to coil) if that don't fix it - again not hugely expensive to renew.
Temporary fix would be spray with WD40 or similar.

[yen_powell]

It'll cost you about £2.50 to find out if that's the problem.

More likely the plug cap and lead though.
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Blackmail is a nasty word........but not as nasty as phlegm!
XT1200Z and a DR350 in bits

[mikojh]

Could a dodgy spark plug behave in this way?

How tight should a spark plug be ive basically tightened it just past finger tight.

What doesnt make sense is the revs in second gear are perfect chuggy in 3rd and sort of fine in fourth doesnt make any sense. Also switching the fuel tap to reserve gets rid of the problem, baffled. so i dont think its the lead.

[Walloper]

An Auld Army Trick:
1) Start the bike in a darkened place. Garage/Kitchen with the light out.
2) Look for High Tension Electrical Current Tracking from lead, plug cap or both.
3)Then... Spray with WD40 and see if it goes away.

4) If it goes away then replace the Lead and the Cap.

Note:- Do not touch the lead or cap when the engine is running or you will get a Kick. It will stop your pacemaker/fcuk up your Swatch.
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W-ireless A-rtificial L-ifeform L-imited to O-bservation P-eacekeeping and E-fficient R-epair

[mikojh]

spray the plug and the cap inside or out?

bikes only 3 years old with 6k on the clock so seems a bit odd given the age for problems like this, bike may have been in storage for while as well. As the starter was wierd until i took it for a good ride.

[Walloper]

[mikojh]

1/2 a turn feels like it would snap the plug.ive tightened like 3ml past finger tight, front and back bulbs have blown seems my problems are just beginning...

[Walloper]

RTFB. (Read The Fcuking Book) To get specific torque for your bike. It states on the NGK box how to tighten. Not sure about Boch etc.

FOR A NEW 'UNUSED' PLUG!

The correct torque should allow the washer to deform and make a good seal and stretch/flex the threads enough to keep tension on the plug and make good mechanical contact between the plug and the head. This should be just before you reach the elastic limit of the material. That is the point where the metal will not return to normal shape when tension is removed.
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W-ireless A-rtificial L-ifeform L-imited to O-bservation P-eacekeeping and E-fficient R-epair

[mikojh]

OBVIOUSLY

<-----NOT A CLUE.

ive just put it past finger tight as it is a used plug and not a new one. When i first put it in i did the same and yeah it does say 1/2 a turn on the box, do it anyway even if its stiff as a bitch?

[Walloper]

[mikojh]

Would it be safe to do 1/2 turn to a used plug, I've done 1/4 of a turn and compared to what it was like its a lot tighter gonna see if theres any difference next time its wet.

[Walloper]

[Helibatics]

No. 1/2 a turn is the spec for a new washer. Once it's deformed after the first installation that's it. Plugs aren't tightened very tightly really. Try to borrow a torque wrench if you're concerned.

Check the ignition system first. The chances of a bad plug are usually very low.

[mikojh]

Ill do your test tomoz as its a bit late now doubt the neighbours would appreciate me starting my bike in my hallway haha.

[mikojh]

It would seem the inlet manifold has got a slight tear in it just after where the seal connects to the cylinder head, do you think ive nailed the problem? got a new on on the way so hopefully thats it.

Is it safe to put a bit of wd40 on it for now.