HT leads for GT380

Ramjam · Post by **Ramjam** » Mon Mar 17, 2014 5:26 am

Hi Everyone
I seem to have put in 'resistor' spark plugs into my head (as the closest plugs i could get in lebanon to the recommended NGK ones were 'R' types). But please tell me if my plug leads are correct for this as they seem to look like they are non-resistor leads. or are they resistor leads? They have 'NGK' written on the top but that's all i can tell you

thanks for your help, as always

best

MJ - only gt380 in Lebanon

tz375 · Post by **tz375** » Mon Mar 17, 2014 7:36 am

There is usually a number on the side like L05 or something like that to indicate it is 5k ohm resistance.

The easiest way is to remove them and measure the resistance. Old caps have a tendency to corrode internally and resistance rises. Look for a place that does boat or scooter repairs or agricultural equipment and see what they have on the shelf.

Ramjam · Post by **Ramjam** » Mon Mar 17, 2014 9:49 am

ok, but tell me about what the configuration should be (please). If the spark plugs are resistor, shouldnt the caps be 'non-resister'?
If i find that these are 5000 ohms, then how does that effect the 'resistor' plugs which i have in?

thanks!

jabcb · Post by **jabcb** » Mon Mar 17, 2014 12:30 pm

Looks like an NGK non-resistor cap on the right cylinder.
If it is, then the letters, "LZFH", should be printed on the large diameter section that is not shown in the pic.

Have a different plug cap on the center cylinder.

Ramjam · Post by **Ramjam** » Mon Mar 17, 2014 12:42 pm

but are resistor type plugs best for the gt380?

And it's correct to say that they should have resistor-free leads, yes?

thanks

tz375 · Post by **tz375** » Mon Mar 17, 2014 2:57 pm

Ideally you would chose to use zero resistance caps if the plugs have resistors in them. My race bike has resistor plugs and leads and uses a DYNA S ignition and it fires fine, but points may be a little weak with that set up.

If it runs fine, don't worry about it, but if the spark is weak maybe it's time for new caps

jabcb · Post by **jabcb** » Mon Mar 17, 2014 3:14 pm

The stock HT leads use copper wires -- they are resistor-free leads.

The stock coils + points ignition don't have much reserve capacity.
So you should use either:
1) resistor plugs with non-resistor caps, or
2) non-resistor plugs with resistor caps

Ramjam · Post by **Ramjam** » Tue Mar 18, 2014 1:08 am

I'd like to replace the caps and the leads as they look like the original ones. The thing is though the lead on number one coil is soft and rubbery as it enters the slim hole on top of the coil and it is locked. Can i just yank the whole thing out? It's a bit weird
any advice appreciated

MJ

jabcb · Post by **jabcb** » Tue Mar 18, 2014 5:09 am

Don't know if you have stock coils.
Post pics of your coils.

Ramjam · Post by **Ramjam** » Tue Mar 18, 2014 5:49 am

take my word for it that i do...

HT leads for GT380

HT leads for GT380

Re: HT leads for GT380

Re: HT leads for GT380

Re: HT leads for GT380

Re: HT leads for GT380

Re: HT leads for GT380

Re: HT leads for GT380

Re: HT leads for GT380

Re: HT leads for GT380

Re: HT leads for GT380