I really enjoy your videos being a dedicated tinkerer of old Brit bikes. I am doing my best to absorb some of your good practices and curb my tendency to bodge.
I recall reading a hypothesis on exhaust valve seat pitting,and it was postulated, that the pitting was caused by the valve actually welding itself to the seat,and slowly removing material,one revolution at a time. It was the lead in the fuel,that prevented this welding process,keeping it dirty enough to prevent welding/pitting.Then again the use of leaded fuel required a de-coke every 10,000 miles or so. Those were the days....? Thought some may find this of interest. Love these videos,straight up,no nonsense.
These are not only fantastic to watch but very very informative. It’s made me into a much better refurbisher/assembler, stopped some of my bad habits and taught me how to do a really good job. Keep making these videos, they are so good.
Machining or sanding head (both sides) and rocker boxes along with pocketed valves may reduce clearance between tappet adjusters and your rocker box cover so that after install you may have valves unable to close fully, check with plasticine or bearing checker ,a nasty condition to locate, I know the hard way
Superb series. I have a T160 that was burning oil. Rings or valves? Shouldn't you check the OD of the valve stem and ID of the guide to see if there is too much clearance (or at least feel for wobble) before re-using the valves and guides?
Just found the site, a most enjoyable series of videos on the T160-a bike I had the pleasure of hammering around on for a few years in the 80’s! I noticed as you were refurbishing the head that the inlet guides had grooves machined in to them for oil seals yet you didn’t fit any! Any particular reason?
I've just had my 850 Norton Commando head done...new guides, valves. The shop did a "three angle grind" on the seats, Can you explain how that is done and benefits/problems with it?
@TornadoCAN99 the first angle would be 45⁰, then a top angle and bottom angle are used to keep the seat from being too wide, different face and throat angles can have an effect on the airflow through the valve.
Hey Dave, I was wondering about your machinest block. What is it made of and what the dimensions are where would I find one and what should I be prepared to pay for one? Seems like a handy hunk of metal.
Beware of your valve seats pocketing that is, being recessed into the head due to unleaded petrol ,and over time it will restrict air flow i replaced mine to make them slightly proud and increase the airflow ,bill gough of Launceston done mine years ago ,a pioneer in tasmania motorcycle racing and engineering rip, refer tas motorcycle club tasmania, the oldest club in Australia
I really enjoy your videos being a dedicated tinkerer of old Brit bikes. I am doing my best to absorb some of your good practices and curb my tendency to bodge.
Always a pleasure watching a craftsman work. Just brilliant. 👍
I have 2 Tridents and I am being motivated by these videos .
I recall reading a hypothesis on exhaust valve seat pitting,and it was postulated, that the pitting was caused
by the valve actually welding itself to the seat,and slowly removing material,one revolution at a time.
It was the lead in the fuel,that prevented this welding process,keeping it dirty enough to
prevent welding/pitting.Then again the use of leaded fuel required a de-coke every 10,000 miles or so.
Those were the days....?
Thought some may find this of interest.
Love these videos,straight up,no nonsense.
Dear Dave I look forward to your videos best thing on the net , super workmanship . thank you .
Another great video Dave, the best workshop videos on the Internet.
Excellent tip on cutting a groove on an old spark plug and using it as a thread tap!
These are not only fantastic to watch but very very informative. It’s made me into a much better refurbisher/assembler, stopped some of my bad habits and taught me how to do a really good job. Keep making these videos, they are so good.
Really enjoyed watching thanks.
You are an artist! 99% of what you do goes way over my head, but i just love watching you do it. Hopefully something will stick.
Great viewing and advice as usual Dave 👍
Always good to review the proper procedures to make sure the job is done right. Excellent video, looking forward to the next installment.
Thanks for the great tip about cutting a slot in an old plug.
The centre plug in my T160 was getting difficult to start, now all grand.
👍👍
Great video, very enjoyable, really appreciate Dave's steady demeanor.
Excellent stuff.
Another great video Dave, wish you had done it a year ago, I gingerly did mine a year ago, and you gave me the confidence I did it nearly right. 👍👍😃
Great work.
I love this videos with Dave just wrenching away on these old bikes, it would be cool to see some Japanese bikes on the channel someday!
He has done some Hondas
Love these videos , it's like being at the tech for motorcycle restoration work. More please.
great job.
Another great video , thanks
Excellent. Thanks very much 👍
Great stuff thanks well worth watching good look for the future...
Love it. Thanks for all your effort putting the video together.
I learnt a lot from this fantastic video.
i would love to spend a day at the shop with Dave, this will have to do. greetings from across the pond. Vancouver island B.C. Canada !
I would love to have Dave prep and maintain my bikes every year. But it's a long way to Australia.
Great video, actually learnt a few things
7:54 - love the calendar :-)
Great video n tips Dave so useful 👍
As per usual. A brilliant video mate cheers
Good well filmed video and very informative as always 👍
Can anyone tell me where could I find this kind of valve seat cutter?
Machining or sanding head (both sides) and rocker boxes along with pocketed valves may reduce clearance between tappet adjusters and your rocker box cover so that after install you may have valves unable to close fully, check with plasticine or bearing checker ,a nasty condition to locate, I know the hard way
Superb series. I have a T160 that was burning oil. Rings or valves? Shouldn't you check the OD of the valve stem and ID of the guide to see if there is too much clearance (or at least feel for wobble) before re-using the valves and guides?
Always take the inlet stubs off to avoid damage while doing valve work
Hello, great video.
What grade wet and dry paper is used for sanding the block ?
Just found the site, a most enjoyable series of videos on the T160-a bike I had the pleasure of hammering around on for a few years in the 80’s! I noticed as you were refurbishing the head that the inlet guides had grooves machined in to them for oil seals yet you didn’t fit any! Any particular reason?
I've just had my 850 Norton Commando head done...new guides, valves. The shop did a "three angle grind" on the seats, Can you explain how that is done and benefits/problems with it?
@TornadoCAN99 the first angle would be 45⁰, then a top angle and bottom angle are used to keep the seat from being too wide, different face and throat angles can have an effect on the airflow through the valve.
Hey Dave, I was wondering about your machinest block. What is it made of and what the dimensions are where would I find one and what should I be prepared to pay for one? Seems like a handy hunk of metal.
I'd like to see how you time the trident being a three cylinder, p.s. liking the videos
Beware of your valve seats pocketing that is, being recessed into the head due to unleaded petrol ,and over time it will restrict air flow i replaced mine to make them slightly proud and increase the airflow ,bill gough of Launceston done mine years ago ,a pioneer in tasmania motorcycle racing and engineering rip, refer tas motorcycle club tasmania, the oldest club in Australia
Good vids. But the filing and grinding is a bit hard on the ears, maybe mute the mic
lmfao stop saying fred it`s thread 🤦♂️