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Motorcycle Discussions => British Bikes => Topic started by: T100striumph on January 29, 2024, 11:19:05 PM

Title: Tiger T100s 500cc engine knock
Post by: T100striumph on January 29, 2024, 11:19:05 PM

Hi all,
On the way to work today 10 mile trip, my bike developed a deep thumping noise, sounds like bottom end under acceleration. Have owned 51 years so used to all the normal noises. Any ideas would be welcome before I start a complete strip down.
Nev in NZ

Title: Re: Tiger T100s 500cc engine knock
Post by: R on January 30, 2024, 12:09:01 AM

Quote from: T100striumph on January 29, 2024, 11:19:05 PM

sounds like bottom end under acceleration.

We think you have hit it in one ?
Drain the oil, and see if any debris comes out.
Big end shells in particular.

51 years is pretty good service. ?
Have fun !

Title: Re: Tiger T100s 500cc engine knock
Post by: iansoady on January 31, 2024, 03:16:00 PM

Does it have the bronze timing side bush or ball bearing?

Title: Re: Tiger T100s 500cc engine knock
Post by: Rex on January 31, 2024, 04:25:35 PM

My old T100S had the plain bush main bearing. I think it was a model designation which only lasted from 1967 to the 1970 model year.

Title: Re: Tiger T100s 500cc engine knock
Post by: Barryhill8 on February 10, 2024, 07:05:41 AM

The engine, finally found the number, is a Villiers 147cc 30C. Does anybody know what spark plug to use?

Title: Re: Tiger T100s 500cc engine knock
Post by: Rex on February 10, 2024, 09:18:30 AM

probably get more replies if you start a new thread about Villiers spark plugs?

Title: Re: Tiger T100s 500cc engine knock
Post by: Rex on March 20, 2024, 03:55:49 PM

So, how did the 500S engine knock turn out, or even the Villiers spark plug? ;)