SOLVED = RD350 Running on 1 Cylinder : Advice

[Milan]

Got the tank on i bought thru the Sale section.
Got the Electrical sorted out.

carbs cleaned.
Put gas in.

Only right side fired right up.
Switched plugs, same thing, only right side.

I then switched spark plug leads, and nothing = is that normal as the timing per cylinder may be opposite?



So, anyone have a short list of order to what to check, and values.
I also have a 250 here I can compare to, and swap parts just to get running.

[Striker1423]

both sides are timed separately, so, just swapping the leads means the plug will fire at bottom dead center instead of top.

To check the coil functions, swap the COIL wires left and right. That doesn't affect timing. If the bike starts running on left side then you found your culprit in the coil. Also, you can simply lay the plug across the head and see if it sparks as you kick it over.

[m in sc]

check connections at points. also make sure left side crankcase isnt full of fuel. take plug out, run on right cyl only. see if a shitload of fuel pumps out of left cyl. if so, thats prob the issue. let air out, fit new plug, try again.

if not that, then onto electrical.

[Milan]

I was thinking that timing thing as stated above, and that they were opposite.

When I took left plug out it was not soaked.
So do not think its flooded

I will try the coil swap tonite.

Thanks all.

M

[m in sc]

when you kick it over with the plug out does it spark? if so.... look at carb.

[Milan]

I will try the spark thing first.

Hard to convince my 14 year old daughter to hold the spark plug while I kick it over.

She asks why?
I say to see if it sparks.

The she runs away.

[Milan]

So if the coil ends up being bad:
Find a Stock one, or is there a better aftermarket choice?

M

[pdxjim]

So if the coil ends up being bad:
Find a Stock one, or is there a better aftermarket choice?

M

Dyna mini coil is a great choice and about $100 on ebay.  Lots of cheaper options tho.

[m in sc]

1st gen sv650 coil. pretty much a bolt in.


https://www.2strokeworld.net/forum/index.php?topic=4576.msg38688#msg38688

[2steve]

Or stock ones from Economy Cycle.
Been there, done that.

[Milan]

Troubleshooting

Primary coil =
4.3 & 4.4

Secondary =
8.4 & 8.6  no cap

Secondary with cap =
50 & 0.

2 different leads.
1 has straight wire that pushen into hole in cap.
That one gave 0.

Other cap is twist on type & gave 50.

So pysh type not makinge contact

[Milan]

So I bent & burred the straight wire a little.
Put back in, and now I hava 8.6 at the cap.
The orher twist one still has over 50

[m in sc]

replace the caps. they should all screw in. like said, caps and wires minimally.

[Milan]

One of the leads had a solid wire in it?
So cannot screw in a cap.

I ordered a set from HVC

[Milan]

Put the 250 coils & wires in the 350.
Started on 1 same cylinder again.

Took plug out. Was wet.

Started bike and getting spark.
Let air out.
Put plug back in.

Started on 1 cylinder again.

Such thing as a weak spark?
Nit being enough to ignite?

M