Compression tester / testing?

[Ingah]

I'm planning to buy a compression tester to use to check over an NSR125 before i buy it (as it's apparently just been rebuilt and i want to check how good a job has been done of that ), and i know they come with various size attachments - so what size attachment do i need to check an NSR125 engine compression?

Additionally, any particular one recommended, as i imagine i'll use the compression tester a fair handful of times and i don't like having to buy another one because i bought one that was totally pants. But my instinct tells me to buy the cheapest one i can find (which from a quick ebay search is stuff like these https://www.ebay.co.uk/itm/PETROL-ENGINE-AUTOMOTIVE-COMPRESSION-TESTER-GAUGE-KIT-/320704358898?pt=UK_Diagnostic_Tools_Equipment&hash=item4aab7829f2 https://www.ebay.co.uk/itm/Professional-petrol-compression-tester-kit-TE19-/110686921466?pt=UK_Diagnostic_Tools_Equipment&hash=item19c57462fa https://www.ebay.co.uk/itm/AUTOMOTIVE-COMPRESSION-TESTER-KIT-PETROL-GAUGE-VALVE-/280711661312?pt=UK_Diagnostic_Tools_Equipment&hash=item415bb80700)

The NSR125 uses the NGK BR9ECS spark plug as stock, which apparently has the thread size of 14mm: https://j-mart.biz/j-parts/index.php?main_page=product_info&products_id=8594

So i'd guess at needing a 14mm size attachment, but does anyone know for sure?
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-- Ingah

[N cee thirty]

i have the one you posted in the first and last ebay links and its a piece of shit,didn't work when i put it on first time,asked the guy if i was doing it right so sent it back and got a replacement and that shows sweet f all aswell

stay away from the cheap ones
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'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[stirlinggaz]

+1 to staying away from the cheap ones....avoid anything that just shoves in, you need a good screw in type that seals well.(with o-rings)
i've had the draper set for a few years now & couldnt/wouldnt do without it.cant fault it either.
its the set with the couple of extra adaptors (30 odd quid iirc), so fits any bike, but you can buy the adaptors seperately.... (tenner each though). if you just want the guage & the 1 adaptor (about 20 quid)
all the parts in the draper set can be replaced, so it should last you for years.....
cheers,
GAZ

[stirlinggaz]

oh, & yup, if spark plug starts with a B, then you need a 14mm adaptor.
have a look here https://www.spark-plugs.co.uk/pages/technical/ngkjpg.htm
cheers,
GAZ

[Ingah]

Thanks, given.

Does this Draper one have a particular model name/number so i can find it on eBay and order it?
____________________
-- Ingah

[John Silva]

Try Ebay item number: 390334662364

[WannaBeDude]

One of these two ftw ... which one no bother afaik ..

https://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=180431419724&ssPageName=STRK:MEWAX:IT

https://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=360334829307&ssPageName=STRK:MEWAX:IT
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Jogging on, destination living.

[Ingah]

Have bought this one:
https://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=150392029404&ssPageName=STRK:MEWNX:IT

Costs slightly more as it's first class delivery.

Thanks guys.

Now to work out how to use it
____________________
-- Ingah