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#51
Singles / Re: 441 Victor Spark Plug Evol...
Last post by Derek996 - 18 Oct, 2026, 10:50Quote from: iansoady on 18 Oct, 2026, 09:57 https://www.classicbikeshop.co.uk/ngk-b7es-spark-plug.htmlAnd they are very expensive.
https://www.sparkplugs.co.uk/ngk-spark-plug-b7es-1111-2
I've tried Brisk plugs and found them no better than NGK or Champion.
#52
Singles / Re: 441 Victor Spark Plug Evol...
Last post by Derek996 - 18 Oct, 2026, 10:49Quote from: Big Diehl on 18 Oct, 2026, 02:06 ...Does NGK even make non-resistor standard plugs anymore?Yes, I get NGK B7ES from a local motor factor.
#53
Singles / Re: 441 Victor Spark Plug Evol...
Last post by iansoady - 18 Oct, 2026, 09:57https://www.classicbikeshop.co.uk/ngk-b7es-spark-plug.html
https://www.sparkplugs.co.uk/ngk-spark-plug-b7es-1111-2
I've tried Brisk plugs and found them no better than NGK or Champion.
https://www.sparkplugs.co.uk/ngk-spark-plug-b7es-1111-2
I've tried Brisk plugs and found them no better than NGK or Champion.
#54
Singles / Re: Advance angle on a C15
Last post by Barnsey - 18 Oct, 2026, 09:14I squirted some oil into the bore and the compression raised from 75 up to about 90psi
#55
Singles / Re: 441 Victor Spark Plug Evol...
Last post by rhyatt - 18 Oct, 2026, 08:59Has anyone explored BISK plugs.
I've heard they're good and a good heat range.
I've heard they're good and a good heat range.
#56
Singles / Re: 441 Victor Spark Plug Evol...
Last post by Big Diehl - 18 Oct, 2026, 02:06Quote from: Andy Kay on 17 Oct, 2026, 12:49 I am currently using the NGK B7ES with no problems on my 68 Victor Special.
As for carburation, it's a minefield, the owners handbook gives different jet sizes and needle position to the workshop manual. The jets and throttle cut out alters for every year model and is different to the B44 roadster.
On top of all that the jets and needle position actually in the carburettor didn't match exactly to any of the information given.
Even so the old girl runs fine.
Thanks for the input Andy. I would gladly try the B7ES however, they seem to be rare without resistors. I ordered a couple from Amazon, and what arrived was BR7ES. I sent them back. Does NGK even make non-resistor standard plugs anymore?
#57
Singles / Re: 441 Victor Spark Plug Evol...
Last post by Andy Kay - 17 Oct, 2026, 12:49I am currently using the NGK B7ES with no problems on my 68 Victor Special.
As for carburation, it's a minefield, the owners handbook gives different jet sizes and needle position to the workshop manual. The jets and throttle cut out alters for every year model and is different to the B44 roadster.
On top of all that the jets and needle position actually in the carburettor didn't match exactly to any of the information given.
Even so the old girl runs fine.
As for carburation, it's a minefield, the owners handbook gives different jet sizes and needle position to the workshop manual. The jets and throttle cut out alters for every year model and is different to the B44 roadster.
On top of all that the jets and needle position actually in the carburettor didn't match exactly to any of the information given.
Even so the old girl runs fine.
#58
Twins / Re: Keyway repair
Last post by DAVE BRADY - 17 Oct, 2026, 11:37Hi,
This is on a parallel shaft so no taper. On the gearbox shaft it is the taper that holds the clutch centre on. Light lapping and a sharp tap on assembly fixes the two tapers together. It is this that needs a puller and some effort to release it.
Dave.
This is on a parallel shaft so no taper. On the gearbox shaft it is the taper that holds the clutch centre on. Light lapping and a sharp tap on assembly fixes the two tapers together. It is this that needs a puller and some effort to release it.
Dave.
#59
Twins / Re: Keyway repair
Last post by V500 - 17 Oct, 2026, 09:41Timing alignment on a two-stroke maybe, which I assume this isn't. Spraying dry lube sounds like a recipe for disaster.
The key prevents shock loads from breaking the taper hold.
The key prevents shock loads from breaking the taper hold.
#60
Singles / Re: Advance angle on a C15
Last post by rhyatt - 17 Oct, 2026, 08:29Any oil squirted into the bore via the plug hole will momentarily seal the rings if they were the culprit.
Always hold the throttle wide open when doing a compression test.
As already said, check the valves
I've you get an increase in compression psi with the oil , then the rings/bore may need attention
If there is no improvement with the oil, then the compression is creeping past the valve seats and a regrind will sort that
Always hold the throttle wide open when doing a compression test.
As already said, check the valves
I've you get an increase in compression psi with the oil , then the rings/bore may need attention
If there is no improvement with the oil, then the compression is creeping past the valve seats and a regrind will sort that