Spark plug T500 B8HS <-> B9ES

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John
Still in the Driveway
Posts: 3
Joined: Tue Nov 17, 2020 7:01 am
Country: belgium
Suzuki 2-Strokes: t500 1974

Spark plug T500 B8HS <-> B9ES

Post by John »

Hello,

I had a visit from someone who looked into the hole where i mount the spark plug. He saw that the last 5 screw threads are black. He thinks my spark plug is not long enough. I have mounted the B7HS spark plug and he thinks i need to mount the B9ES. ( a longer one & better temperature resistented ). Is that possible? Does that mean I don't have an original culasse on the bike?

Thanks in advance!

Grtz
alanr
To the on ramp
Posts: 260
Joined: Sat Jan 29, 2011 10:51 pm
Location: New Zealand

Re: Spark plug T500 B8HS <-> B9ES

Post by alanr »

B7HS is short reach.it is the correct plug for the T500. consult manual for confirmation. Not sure of his recommendation.
CB360T
TT250
John
Still in the Driveway
Posts: 3
Joined: Tue Nov 17, 2020 7:01 am
Country: belgium
Suzuki 2-Strokes: t500 1974

Re: Spark plug T500 B8HS <-> B9ES

Post by John »

I have seen now that i have a tr500 cilinder head. There are little holes in.
Zunspec4
Expert racer
Posts: 1087
Joined: Tue Dec 16, 2008 11:37 am
Country: UK
Suzuki 2-Strokes: T500R, SV1000S, TS125, Seeley T500
Location: Trowbridge UK

Re: Spark plug T500 B8HS <-> B9ES

Post by Zunspec4 »

Hi John,

If your heads are genuine TR heads they will be of the "centre plug/squish" type i.e. the spark plug hole is directly in the centre of the combustion chamber. When I responded to you on FB I assumed you had std. heads. My centre plug heads take the longer reach plugs (in my case NGK B10EGV) and have a thicker dome to the combustion chamber to allow the squish to be machined safely.

Cheers Geoff
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