1974 Norton Commando 850 - Part 9 - Flow test and new pilot jets
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- เผยแพร่เมื่อ 21 พ.ย. 2024
- 1974 Norton Commando 850 - Part 9 - Flow test and new pilot jets
Just a couple of minor jobs coming out of the recent test ride around the cul-de-sac!
1. There seems to be a flow problem!
2. I’m changing out the original size 17 modified pilot jets in the air and a L Premier carburetors for a more appropriate size 19 jet. By all accounts, they help the bike run a little richer.
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If you look at the jet just above the tapered part there should be some rings. 2 rings is a #17 and 3 rings is a #19.
Thank you very much, Mitch! I didn't know that. I just checked the jets that I took out and there are no rings, so I suspect they were not Amal but other aftermarket jets. I see now what you mean with the 1 ring = 15, 2 rings = 17 and 3 rings = 19. Many thanks for your advice! Cheers, Mike
I just rewatched this vid and read comments.......my pilot jets are 2 ring, ordered #19s.....always learning, thank you
About the sweetest commando i've heard run.
Shows you just how easy it is to miss something no matter how thorough you try to be in your assembly process.. Thanks again for the reminder.
My 1968 750 commando ran out of gas in the middle of the Tacoma narrows Bridge. It had two reserve taps installed. A good Samaritan helped me get more gas. Later sawed the standpipe off of one of them.
Loves these old bikes. They sound great and look great. Learned a lot about mechanics working and fine tuning these beautiful machines. Those were the good old days. They were simple yet a fine art to keep them running at there best. The worst thing about these bikes is that you can't keep the silly grin off your face while riding them.
That's great. I find taking a closeup shot of jets and carb seats with my phone, and blowing them up, reveals a lot more detail than anything else.
Here I thought you were going to a "flow bench", but you clearly went the right place, very nice little plug.
Always so relaxing watching your videos. a real antidote to these hard times
Many thanks. I know what you mean! It's a nice escape for a moment. Best wishes, Mike
Looks just like I remember at the Norton dealership back in San Mateo CA when I was in HS.
Cool Don! It's a pretty rare color. I bet it must've been quite a sight to see a whole row of brand new bikes back in the day. Best wishes, Mike
I might honestly be the youngest Norton owner I might need to move to Oregon to be around more of these amazing bikes!
😉😉Come on over Tyler, you would be most welcome!
I installed #19 pilot jets in my 71 Roadster with new premier carbs for much the same reason. It was defiantly an improvement. I did the same to my 71 Bonneville and it was an amazing improvement.
Thanks for posting Mike. Any excuse for another look at your beauty of a Commando is fine by me!
Thank you George! Hope all is well
Sounds lovely mike. Amal supply 17 pilot jets for the premier Trident carbs, but most owners also change to a 19 pilot jet.
Thanks a lot, Judd. These new 19s are much better than the old jets, thanks for your note. Best wishes, Mike
That's what a proper motorcycle should sound and look like.
Moderns are ugly compared to these bikes.
One more bug gone. Enjoyed the vid Mike.
Thanks a lot Henry! There's going to be a longer ride on Sunday morning that I hope you will enjoy. Cheers, Mike
This just keeps getting better and better.
Many thanks Jim! I hope you will enjoy the upcoming video on Sunday morning 😉
Nice job Mike!
Well it sure sounded sweet pulling up your street. Also...how cool it it to see TWO Vincents just sitting there parked???
I think the O.N.E must hold the record for the most road going Vincent's in one locale . Great to see them being used for their intended purpose .
@@anthonycarty9433 absolutely. They were built to be ridden, so why not ride them.
Many thanks Anthony. Yes they are definitely ridden and are great fun. Cheers, Mike
Great job Mike and great video. Every time I watch one of your videos I learn something new - today: how having the right tools makes life so much easier. Looking forward to the next workshop video. Cheers marra
Mike : Piece of cake....,!!!!! Thanks,,,
Nice video Mike :)
Many thanks and thank you for all your terrific videos. I love watching them all. Best wishes, Mike
Where on earth did that muck came from? The bike looks great in that gold metal flake
Love that colour Mike!
Superbe vidéo très bien expliqué,très intéressant ,merci MIKE
Well I was gonna post a comment on the desirablity of British parallel twins until at the end when there was that glimpse of the Vincents! 😁 But yeah....who among us can hope to own a Vinnie?? So we're back to parallel twins! Everyone made 'em.....they're all something to lust after in their own way. Triumphs always seemed to have great styling...pick your favourite year and/or model! BSA finally made art with the Rocket Goldie - but again....who'll ever own one?? So a Commando comes out as a strong option. And they're as pretty as those English models they used to photograph sitting on them in the old advertisements!
Many thanks Roger. I enjoyed reading your note. Yes, I know what you mean about the wonderful styling. There's so much to be said for these bikes of the 50s and 60s and getting into the 70s. Best wishes, Mike
Please be careful when turning the petrol taps. Use finger, but the thumb should support the tap shaft. These are brass, but the plastic ones are otherwise prone to breaking (which you mentioned as well). And the shaft will wear more, so wear out sooner, if the turning force is not supported by the thumb, but by tap shaft and housing.
Paint looks awesome!!! Good one Mike!!! Hello to you from North Texas!!! Home of Big D Cycles!!! Haven't been down there in a while!!! Take care!!!
Nice bike
Thank you Paul! The orange disco ball color 🪩 has certainly grown on me. Best wishes, Mike
0:21 Open Road brought to mind the 1st part of Beck's song: ''Ready Made''
An open road where I can breathe
Where the lowest low is calling to me
I can pull myself back up back down
Stuck together like a readymade
-DU69160
Coming along nicely Mike 👍
Good news Mike, sometimes it's just a simple 'fix' for a great result .. 😉.. 🏍
atvb t ..
It’s that man Geoff again 😀
Was he gone for along time, I know I would of gone for miles just to give her a good test 😂
Hehe, I thought he might not come back, David. He wasn't gone long fortunately. Hope you will enjoy the longer ride coming up on Sunday morning, with Geoff as my wing man!! Best wishes, Mike
Very nice - looks mint!
Rotor!!…….. Mike, you’ve been there too long……😁
did that make it better than the Vincent parked at the curb??
In the dying days of NVT etc, Amal was pressed to lower and lower prices as a supplier. And Amal products got worse and worse. But you'd think that the newly contemporary Amal carbs would be much better.
I love these videos, and would like to ask Mike, if there is a video of recommended garage gear. Bike lifts, or others which are worthwhile. Also need to ask for your thoughts on the W800. I know, not British, but for those without the wherewithal, the purest homage to British bikes out there. Imho. :-)
Thank you very much for the suggestion. That's a really good idea. Yes, I'll give that some serious thought about doing a video of my favorite tools and equipment in the garage. I really like the new Kawasaki W800. They are a really great looking bike. I know what you mean about being closer to an original classic than some of the new modern classic triumphs. In the video that will go out tomorrow morning, there's another sneak peek at Pam's W650. Her husband Bruce started it up again and it reminded me again of the video in the cul-de-sac and how cool the bike looked. Best wishes, Mike
Sounds better....
Yah! Success
Thanks for sharing Mike ! Question 🙋♂️ “ you don’t do Gallstones on the side mate do you “. Ray🇬🇧
HAHA! I've had had mine out, but I'm sure I could get my old endoscope camera out and some Whitworth tools and have a go, Ray 😉😉
A few comments. A) What the heck was that in the petcock and how did it get thru the screen? B) I had to go to 19s on my 930 premiere's on my 62 Bonneville, those jets ain't cheap and 3) I've noticed that the new monobloc carbs seem have issues with the tickler getting enough reach to flood the carb. I've had to machine a longer tickler to make it function properly. You could be there for days holding it down and nothing would happen.
Thanks very much! I'm not sure what that buildup was in the petcock! That's a smart idea about making a longer tickler. Yes, the 19 pilot jets seem to have done the trick! Thanks a lot, Mike
Great video, thanks for posting. Any idea what, exactly, the obstruction was??
Hi Rod, I don't know what it was. Possibly some tank cleaning fluid or something like that? It was a relief to clear that blockage 😉 Hope all is well!
I really enjoy all your videos and I hope you don't mind me saying. The Norton tick over sounds all over after the run and didn't sound right on setting of. Now you probably know better than me as you have a lot of experience with Nortons but from an old mechanic something doesn't sound right.
Thanks a lot Keith. No problem at all. I've still got some fine-tuning to do on the carburetors. It's getting getting closer, but I need to put them on the synchronizer to make sure that they are balanced and set better. cheers, Mike
@@TheMightyGarage ok Mike. Keep up the good work.
Funny the jets aren't stamped and it also shows that something which looks clean and new might still be the problem like the tap.
Hi Kevin, thanks a lot. I just learned today that the official Amal jets are identified by the number of rings/grooves that they have at the tip of the jet. The ones that I took out didn't have any rings and so they mustn't have been OEM or perhaps they were older. Cheers, Mike
How many of us can use the word "Amol" in a sentence and not include a swear word? Well done Mike!
😀😀 So true! 😀
The devil is a squirrel, as we say here in Germany. Der Teufel ist ein Eichhörnchen, for those, who will train their German a little.
Regards Uwe, safe rising!
Hi Mike , have you been through your gearbox to replace the dreaded Portuguese layshaft bearing ? I have a 73 MK5 750 , and was wondering when they might have started using them . Cheers from NZ .
Hi, I haven’t been through the gearbox yet. It seems OK, but I must say that I noticed a little whining noise when I was riding to the club last weekend. I’m going to pay close attention to that. Best wishes, Mike
Thanks , with your rotor , check your spigot size or if the chamfer isn't big enough , it should be obvious what's causing it to rock. Great to see your videos all good and informative. .Cheers
"Cycle" magazine, Phil Schilling 1974.
"The Norton vertical twin should have died and gone to legend a generation ago. In a world of perfect logic, engine designs should never maunder on for decades and finally be crushed by onrushing technology. Good ideas deserve better. Good engines should go to harvest in the fullness of their autumn; most mechanical things which struggle on simply die cold and wretched in December.
Seasons do not cover England in perfect symmetry. Spring is cold and damp, and so is fall and winter. Onrushing technology there slows; the present walks in cadence with the past. And mechanical things like the Norton twin soldier on and on...through the Fifties...into the Sixties...and reach the mid-Seventies. In other places, someone would have raised the last hurrah at an earlier stage-when the original 500 twin turned to a 600, or 650, or 750, or 850. But somehow, no matter how deep Norton reaches into December, the final cheer never comes. There's only the next hurrah."
You need to stop washing your socks in the fuel tank Mike (Grin)
Haha! That must have been the problem 😉
👌👌👌👌👌
So the fuel tap was blocked with ear wax !.
😀 hehe, it sure looked like it didn't it!
😜🏍👍
Riding.....