The mighty backfiring saga (Well hopefully not a saga!)

[Ivan]

Yeah its really odd system.


Um we went leaner than stock but also we had more fuel coming in the barrel with the bigger inlet port.

So youve got less fuel coming in and differnt chamber and itl be on the edge of running to lean

[Str8 Jacket]

My money's on the crank seals have given in. Easy fix. just means you gotta spilt the cases. If your in the mood for it one weekend give me a yell ill give you a hand.
Maybe a full looking over is the best way to isolate the problem in that case.

*ahem* we're not talking about my A100 are we?! I am gonna get around to looking at it. At the moment I am busy but I refuse not to be involved in the fixing up of the A. I think it may be the crank seal OR the carb. It could also be a multitude of other things but I would like to do it myself..... I'll let you know when I want to pull it apart again and you can come and help me/us out. Thanks for the offer of help though!
Anyway, back to your bucket prob Kyle!

[F5 Dave]

Just to confirm we wnet through this at tech these are cdi ignition with the CDI being located inside the coil.

Down there in the bottom end there will onlybe the stator coil the lighting coil has been removed to take less drag off the flywheel.

Just a point, these suzi coil/cdi units are pretty susceptible, RG50 ones died often.

But backfiring is often wet/stuffed plug or timing way out. Have checked timing with TDC matches flywheel pointer?

[quallman1234]

But backfiring is often wet/stuffed plug or timing way out. Have checked timing with TDC matches flywheel pointer?

Funny you say that i think the plug was a bit wet.
Will try a new one next round.

Thanks for the help!. Don't have time at the moment (VMCC and Uni exams coming up!) to have a look at thing's will post up with an update next weekend sometime.

[quallman1234]

Nevermind going to the garage now will post up later with my finds etc.

[quallman1234]

Updated ===

Things found what i should of looked for before the weekend anyway (rushed)
-Spark Plug Cap, had electrical tape around it because half of one of the sides was missing. Result - Replaced with a NGK spark plug cap what looks good

-Took the plug out.
The plug looks very very gray! and is slightly wetish for a couple of threads.
looking at this http://www.skunkworks.net.nz/Spark_p...ding/index.php (thanks skunk)
it appears to look like number 27 Woo! - Too hot or lean / pre ignition range.
also the plug was a B9ES (the colder type)

Going to whip the flywheel cover off and check the timing out now.

[Ivan]

Just a thought.

The chamberrunning through there couldnt be evaporating fuerl once the carby etc got hot could it?

[Skunk]

Well, the advice here is helping me with my issue. Thanks F5 Dave and Ivan.

Which coil is the stator coil? There's two in mine one big and one small...

[Ivan]

Well, the advice here is helping me with my issue. Thanks F5 Dave and Ivan.

Which coil is the stator coil? There's two in mine one big and one small...

Ok the one going directly to the igntion up to the coil should be black with Red stripe thats the wire you want and the coil you want but there will be another coil with wires that belonged for lights etc thatwont be hooked to anything thats the one you remove that coil.

[quallman1234]

Just a thought.

The chamberrunning through there couldnt be evaporating fuerl once the carby etc got hot could it?

Maybe, however the picture's a little misleading.

Update ==
Timing appears to be fine as ivan said he didn't touch it.
However i did find that the clutch push rod was bent
and
There were only two screws holding the flywheel cover on.

Mmmm maybe i should of done this when i got it. Oh well!

[Ivan]

Maybe, however the picture's a little misleading.

Update ==
Timing appears to be fine as ivan said he didn't touch it.
However i did find that the clutch push rod was bent
and
There were only two screws holding the flywheel cover on.

Mmmm maybe i should of done this when i got it. Oh well!

So most likely a bit of jetting then.
Try a tad richer but if your saying plugs wet then thats a bit rich anyway.

Remember a slight tanned look is just right as youl learn on the 125's

But its odd your saying when it gets hot thatit plays up thats why I thought of the fact that fuel could start heating up to much from direct heat source around as the chamber would be getrting that area of the motor fairly hot.

Just try with going richer on the main jet

THen you can always adjust from there

[Skunk]

Ok the one going directly to the igntion up to the coil should be black with Red stripe thats the wire you want and the coil you want but there will be another coil with wires that belonged for lights etc thatwont be hooked to anything thats the one you remove that coil.

That would be the small coil then. That's the one I used...

[Str8 Jacket]

Well, the advice here is helping me with my issue. Thanks F5 Dave and Ivan.

Which coil is the stator coil? There's two in mine one big and one small...

Stator = Stationary.
Rotor = Turning.

As Ivan says two stator coils in yours.

[Slingshot]

Mmmm maybe i should of done this when i got it. Oh well!

It's fucked...give it to me

[Skunk]

Stator = Stationary.
Rotor = Turning.

As Ivan says two stator coils in yours.

Nah, Ivan saying one is lighting and the other is the ignition stator.