Triumph Bonneville T140: checking valve rocker clearance

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I am checking the valve clearance on my Triumph Bonneville T140E.
This check must be done with the engine cold.
The clearances should be 0.008 inch on the intake valves and 0.006 inch on the exhaust valves.
You can download a number of documents for free from my "Buy Me a Coffee" page - all free with no catches - it is just a convenient place to make downloads available for free (but there is an option to buy me a coffee if you enjoyed this video and feel overwhelmed with gratitude) - including:
- T140 service checklist;
- T140 torque settings;
- T140 parts catalogue
and other items: www.buymeacoffee.com/fromthes...

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27 июл 2024

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Комментарии : 27

@steelsporty 3 месяца назад

I had a '75 T140 many years ago. Fitted the valve clearance adjusters with a hex hole for an allen key, which made adjustment easier than using clumsy pliers.

@daveco1270 6 месяцев назад

I'm glad I watched this... on my other bikes the exhaust valve is usually the bigger number. I probably would have done 6 thou inlet and 8 thou exhaust if I hadn't watched this video and then went to double check. (At first I thought you had it backwards, but you were correct.)

@Segsy59 2 года назад

Always good to see someone taking the time and effort to make videos like this, simple enough process but if you're new to the old brit biking scene or have been away from it for a while and returning a clear tutorial is helpful.

@rickconstant6106 2 года назад

A good, straightforward explanation of the procedure. I would advise against the re-use of the gaskets - those looked well flattened and likely to leak. I cut new gaskets every time from 1/32" (0.8mm) gasket paper, using an old one as a template, and fit them with a smear of grease on both sides to stop them sticking next time. It looks like access to the inlets is easier with your US tank, on my UK model I have to take the tank off every time (it doesn't help that the carbs on my T140V get in the way).

@bm7760 Год назад

Appreciate the video. One small, good-practice point. I usually blow any dust or grime away from the spark plug base before removing the plug.

@SongsFromTheSaddle Год назад

Great tip! Thanks for sharing

@markgillett5574 2 года назад

The subject matter of this video is perhaps a niche interest. However, speaking as a mechanical beginner who owns a 1979 T140E, all I can say is keep going!

@SongsFromTheSaddle 2 года назад

Clearly I'm not making these videos to gain millions of views and become a social media superstar !

@stepheneldridge6998 2 года назад

Great how to video...looks like a nice straightforward bike to work on. Looking forward to seeing the Scrambler valves being done!!...Cheers, Steve

@SongsFromTheSaddle 2 года назад

The rate I'm putting miles on the Scrambler that will probably be soon!

@bobfitzy6236 Год назад

I remember doing that. You can recognise the different tone of each tappet after a while.

@classiccycleconnection9334 Год назад

Very good video on checking . Yes the gaskets can be reused . A surprisingly small amount of oil lingers up top. One thing , I try the next thicker feeler gauge to see if the valve is too loose . If say a .009 or a .010 fits then you are too loose . Just a way to make sure the top end is a bit quieter . Next vid can you show an actual adjust of a rocker for those who haven’t done it ? Thank you .

@SongsFromTheSaddle Год назад

Good tip on the thicker gauge! I intended to make a video about how to adjust the rockers, but found they didn't need adjusting when I checked them. Maybe I should have put one out of adjustment, just for the video.

@chrisfoden4911 2 года назад

Thanks for taking the time to make this video, I have a T140V 1978 which is the same. The manual says adjust the valves with the engine cold, a fellow a Triumph owner recommends with a hot engine. Any thoughts?

@SongsFromTheSaddle 2 года назад

Definitely cold

@pattoallen1981 5 месяцев назад

Since when has any exhaust clearance less than the intake? Id like to know what book you got those specs from?

@SongsFromTheSaddle 5 месяцев назад

Hi. It may seem counterintuitive, but that is correct. From the original Triumph workshop manual

@user-rh4it8vv2w 7 месяцев назад

Do you think gasket goo, eg Wellseal, one side of the gasket, both sides, or neither? Maybe one side, with a smear of oil on the other?

@SongsFromTheSaddle 7 месяцев назад

I think everyone has their own opinion on this!

@maximmertens8667 Год назад

What is the clearance in mm for inlet and outlet? Great video!

@SongsFromTheSaddle Год назад

Inlet 0.20mm; exhaust 0.15mm

@mikeashcraft4354 Год назад

I bought my Bonny new in 1978. A T140( the E is stamped backwards). Any thoughts why?

@SongsFromTheSaddle Год назад

No idea!

@rickconstant6106 Год назад

Punch operator was in the pub at lunchtime?

@pattoallen1981 5 месяцев назад

Last video was 2 and 4 tho whos right and whos wrong?

@SongsFromTheSaddle 5 месяцев назад

I'm not sure which "last video" you are referring to, but the clearances I state in the video description to this video are straight out of the original Triumph service manual. I also have the Haynes manual and both give the same figures. If you have different clearances, where do they come from?