Hi all, it's been a while as I have been busy working on my '91 VFR 750 project.....

Anyway, I thought I'd have a look at the plug caps on the '30 (the bike has an occasional misfire/stutter) - past experience has shown that it's usually the plug caps at fault (internal corrosion causing high resistance = misfire).

Unusually, the ht leads appear to be soldered onto a plate inside the cap. I only found this out after "unscrewing" them (the HT leads), the end of the leads have broken away from the plate (which is rusty & manky anyway). Obviously, they won't reassemble....

Q; Does anyone know of readily available 5k ohm plug caps that will be a good fit onto the nc30 - I'm thinking from the car world (plentiful & cheaper than bike stuff), I want new rather than used & would prefer something with a rubber cap that seals the cap/rocker cover.

Many thanks in advance....

Pip

I'm pretty sure Rick Oliver does replacements, I can't see them on his stock list though, just fire him an email.

Yep - he does. I just ordered some!

Cheers for the replies,
Luke, do you know if the caps that Rick sells are the 'normal' readily available anywhere NGK caps (8238/8072) or ones that have the rubber cap in place, do you know if they are straight or 105* bend?
There is a chance I could refurbish the old caps - they have an odd design whereby if the lead is pulled out even just slightly contact will be lost with the resistor.....

Cheers, Phil

Ok, after a bit of meddling I have managed a suitable repair of the old caps, so fingers crossed.

As an aside, I'd strongly recommend everyone to test the resistance of the plug caps during a service on an older bike - It's surprising how many have heavily corroded internals to the caps.
On the '30, both pairs of caps showed open circuit when tested with a multimeter, now repaired are within specification.

Pip

That's a good idea pip nice heads up.

Out of curiosity are ricks a copy of the original type or just a generic type

Ricks are NGK, but are very similar to the originals i.e straight rubber cap. Well, I'm assuming the ones I have one there are the originals - they might not be, but I wouldn't know!