Do sparkplug electrodes wear away?

[tutton]

If so why do they do it?
Ive just whipped the plug out of my RS, and its a BR10EIX and compared it to a BR9ES from my old bike, and the electrode is very very small.

Some pics of the plug, What ya rekon sposes to be like this?
First pic is my plug, note electrode in centre size
https://i123.photobucket.com/albums/o297/Gfxs/DSC00341.jpg
Second pic is comparison plug closest to the bottom is the BR9ES top plug is the BR10EIX
https://i123.photobucket.com/albums/o297/Gfxs/DSC00337.jpg

Cheers
____________________
Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[ms51ves3]

I think it may be because someone has fitted an iridium plug to the bike.

[tutton]

What that its got a small electrode by getting too hot?
or by plug design?
I cant work out whether the plug is just about to give up from the electrode or not...
____________________
Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[ms51ves3]

[Blue_SV650S]

Google that plug, they have small center electrodes!!

But yes, electrodes do wear.

Its the arcing, normally the center electrode goes from flat top to rounded.
____________________
The purpose of life is to fight maturity.

[tutton]

Ahhh right,
pretty pointless having iridium in a 2smoke tho =/
Running really lumpy atm
____________________
Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[Blue_SV650S]

[tutton]

Thats the thing, this one seems to have clean plugs for a 2stroke, too clean almost.
Was hoping it was why its running like it is,
Only things that have happened just before it was like this was exhaust rewelded up and repainted in high temp black.

Now my bike seems to get alot hotter it got to 90 degrees C today,
only ever peaked 73 before?
____________________
Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[Blue_SV650S]

Is the exhaust leaking?

What the exhaust modified in any way?

The excessive temperature could be it running lean ...
____________________
The purpose of life is to fight maturity.

[tutton]

We had the sides off and it has one tiny pinhole,
had enough backpressure to cut the bike out when hand is over the end of the can.

Exhaust wasnt modified as such just a plate welded over where it had blew a hole.
Im thinking the VHT paint is not letting the heat dissapate out, and as the exhaust port will be near where the temp sender is its getting very hot around that area?
____________________
Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[Blue_SV650S]

[tutton]

As far as im aware no,
The bloke said it was full power, but i dont know what they look like although i was aware for powervalve the rave box needs to be in the rear seat unit which it isnt so id say it hasnt.
____________________
Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[ms51ves3]

[tutton]

Any way i can tell then?
like obvious things i will know if i see em.

As far as i know its got a Debaffled can, Pipercross foam air filter, and bigger carb.
____________________
Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[Blue_SV650S]

[tutton]

'99 RS125
Coolant level checked plenty in there..

What else simple is there to check about cooling?
____________________
Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[Paulington]

Iridiums in a 2poke make a tiny difference, what we use for my racing, it's almost negligible. On the road, would be impossible to tell the difference.

As for power valves, if it is locked open it will give fuck all power top end. Low bottom end if it is locked down.

When I say bottom/top, 0-8k is bottom, 8k+ is top. You can tell if it's locked just by listening to the engine tone, if it fluffs a bit then goes a lot higher around 8500 revs, your power valve is fine.
____________________
"Four wheels move the body, two wheels move the soul."
Current Vehicles: '89 Kawasaki KDX200, '99 Yamaha XV535, '00 Honda ST1100 Pan-European, '08 Suzuki GSX-R1000, '08 Mitsubishi Lancer GS4 2.0 TDCi, '15 BMW 1 Series 116d Sport Turbo.
CBT: 27/08/08. Theory: 04/09/09. Module 1: 16/09/09. Module 2: 01/10/09.

[tutton]

I have no real pull under about 6K,
then it takes off, any help?
and something with that exhaust is making it hot im sure.
____________________
Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[Blue_SV650S]

[tutton]

If the power valve is on the exhaust port hole, we didnt remove anything but the downpipe and can, and refitted it exactly the same?
So im guessing no powervalve there, as there was no solonoid near the port or anything.
____________________
Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[Paulington]

Agree with Blue, check out your thermostat, my racing engines are an RS125 engine without the gears and they like it around 55-60, 90 is starting to cook it.

Make sure you have coolant circulating, enough of it.

Check the valve as previously stated, the exhaust won't affect it that much.

MAKE SURE IT IS NOT RUNNING LEAN. And it has enough two stroke oil.
____________________
"Four wheels move the body, two wheels move the soul."
Current Vehicles: '89 Kawasaki KDX200, '99 Yamaha XV535, '00 Honda ST1100 Pan-European, '08 Suzuki GSX-R1000, '08 Mitsubishi Lancer GS4 2.0 TDCi, '15 BMW 1 Series 116d Sport Turbo.
CBT: 27/08/08. Theory: 04/09/09. Module 1: 16/09/09. Module 2: 01/10/09.

[Blue_SV650S]

[Paulington]

Double post, woop.

If there is no cable coming out from above the exhaust, you have no power valve or at least no solonoid connecting to the valve.
____________________
"Four wheels move the body, two wheels move the soul."
Current Vehicles: '89 Kawasaki KDX200, '99 Yamaha XV535, '00 Honda ST1100 Pan-European, '08 Suzuki GSX-R1000, '08 Mitsubishi Lancer GS4 2.0 TDCi, '15 BMW 1 Series 116d Sport Turbo.
CBT: 27/08/08. Theory: 04/09/09. Module 1: 16/09/09. Module 2: 01/10/09.

[tutton]

Two stroke full did that yesterday,
it wont be running lean as ive just said its only since the exhaust has been off and repainted its risen in temp,
I use to wait till 65 before giving it any proper abuse, and it would happily peak at 73.

Must have coolant circulating of the headgasket will be warped already.

Just checked no cables above exhaust :S
____________________
Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[Blue_SV650S]