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PR: Proprietary Items Electronic Speedos?


Robert Watson

Well Known and Active Website User
VOC Member
The quarter mile function worked well when I had the 1000 cc engine in place, but not so well with the 1360.
Because the sender is on the front wheel and the unit is measuring distance, it gets confused when the front wheel is not in contact with the ground. A rear wheel sender location is planned.

Glen
Except until you get the traction control sorted the rear wheel will be spinning up and still confuse it!
 

Glenliman

Well Known and Active Website User
VOC Member
I'm not very happy with it at the moment.
Sometimes it has to go as much as half a mile just to go a quarter mile!
That just can't be fuel efficient.

Glen
 

Cyborg

Well Known and Active Website User
VOC Member
So the tach from Caerbont arrived this morning. Not what I would call a close enough match to the Puka speedo. Dial and needle (I assume the same maker) are just fine and they both use the same script for "Smiths", but the slightly larger case combined with the bezel made it different enough that it will likely drive me nuts every time I look at them. The case (metal) on the Caerbont is slightly deeper, but not by a lot and wouldn't likely notice it once installed. Just thought I'd post this here for future reference and I'll reserve the bitching and moaning for my own thread. Although the fellow at CAI mentioned the 82mm when you factor in the diameter of the bezel it adds up enough to make it noticeable. Oddly enough the paperwork that comes with the Caerbont tach refers to it as 80 mm.
 

Dave61

Well Known and Active Website User
VOC Member
So the tach from Caerbont arrived this morning. Not what I would call a close enough match to the Puka speedo. Dial and needle (I assume the same maker) are just fine and they both use the same script for "Smiths", but the slightly larger case combined with the bezel made it different enough that it will likely drive me nuts every time I look at them. The case (metal) on the Caerbont is slightly deeper, but not by a lot and wouldn't likely notice it once installed. Just thought I'd post this here for future reference and I'll reserve the bitching and moaning for my own thread. Although the fellow at CAI mentioned the 82mm when you factor in the diameter of the bezel it adds up enough to make it noticeable. Oddly enough the paperwork that comes with the Caerbont tach refers to it as 80 mm.
Thats not good.
It`s a shame there isn`t a supplier that could be relied on to match what you`ve got.
 

Cyborg

Well Known and Active Website User
VOC Member
My Godet Egli-Vincent has the electronic speedo and tacho from Smiths. The blue odometer and trip display are completely illegible in the sun (not even direct sunlight). But even worse, that's how the speedo looked after the first ride in the rain:

View attachment 24032

When I showed it to Patrick Godet, he send a mail to Smiths and ten minutes later, he got this answer: "We know about this problem. You are not the first one who complains about it. We use the best seals available though and do not know how we could improve it. You (P.Godet) should explain your customers how to clean their motorbikes."Meanwhile, the water inside has evaporated, the speedo still works and the black paint of the dial is peeling of. You have been warned.
So when you say Smiths, which Smiths are you referring to? Puka or Caerbont?
I'm assuming by the face it is from Caerbont.
 
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Cyborg

Well Known and Active Website User
VOC Member
Thats not good.
It`s a shame there isn`t a supplier that could be relied on to match what you`ve got.
I suppose I could buy a matching speedo from CAI, but I'm in pretty deep already. They claim theirs are waterproof, so that may be a plus.

 
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vibrac

Well Known and Active Website User
VOC Member
Just tested my Acewell speedo on the egli comet against a village speed sign conveniently just erected down the road and it said 29 when speedo said 22 I shall have to alter my circumference setting;
 

Dave61

Well Known and Active Website User
VOC Member
So when you say Smiths, which Smiths are you referring to? Puka or Caerbont?
I'm assuming by the face it is from Caerbont.
Thats what I confuses me,I think anyone can use the name, but I think the Caerbont ones are definitely the ones that Digital Speedos supply & they aren`t the same as Puca.
PS. I thought 3" was 76mm
 

stu spalding

Well Known and Active Website User
VOC Member
Some of those road side speed signs should be treated with great caution, as I've found as much as 4 mph difference between some of them for a given speedo reading. Cheers, Stu.
 

Trevor Lever

New Website User
VOC Member
I am having the same problem with my replica Prince which Patrick recently supplied to me. After first wash the instrument has much water inside.
This was abt 3mths ago. It hasn’t gone since! 120k machine stopped by this rubbish! I have waisted so much time with this problem.
Ciao T.
 

Cyborg

Well Known and Active Website User
VOC Member
Which “Smiths” instrument do you have? The one that looks like the old 3” Smiths chronometric with the screw on bezel that came from Puka or is yours from Caerbont? Can you post a photo?
 

Sakura

Well Known and Active Website User
VOC Member
I don't understand why there's this water ingress problem. The original chronometric is not a truly sealed case but I have never had water ingress. The bezel has a fine thread and is sealed with a rubber ring between ring and glass. Surely this can't be difficult to replicate?
 

Cyborg

Well Known and Active Website User
VOC Member
For what it’s worth, the tachometer that I purchased from CAI (the 82mm one) is listed on their site as waterproof to IP67, which according to Wikipedia means as long as the ditch doesn’t contain more than a meter of water and I haul it back out within 30 minutes, it’s all good. It has a crimped on bezel, so if the speedo in post 53 is from CAI, then they have changed from a screw on bezel to the crimped on one.
 

fitzer

New Website User
Non-VOC Member
I've been stalking this forum for a while...picking up tips on this and that...
For what its worth... I had a chat with Patrick from Puca at a classic maserati meet in the spring, his company had just fitted some very nice instruments to a friends replica racer. The long and short of it seems to be that he brought the idea of the electronic MC instruments to CAI in 2012, they went with the idea, CAI built them and Puca did the designs and acted as the sole agent ...also acting in PR/marketing capacity for bike product for CAI so it seems the association was quite close...and then CAI got bought out by its production manager, there seemed to be a difference in opinion on how accurate the replica gauges should look and they went their separate ways. He told me Puca still use CAI mechanisms but pretty much everything else is done in house.
Can't speak for the quality other than look of them which is really good....don't really know what the bloke is like either but I've meet quite a few numpties in the press/photo game and he seemed level headed and very switched on.....
some of you say you couldn't get an answer from Puca? the guys do answer their mails ....well so far to me they have...are you using the right address? (smiths@puca.co)
 

BigEd

Well Known and Active Website User
VOC Member
VOC Forum Moderator
A friend in the AJS & Matchless Club is on his 3rd electronic speedometer and this one has a faulty trip. Maybe he is just unlucky, he is certainly fed up. He said they are "Smiths" but I don't know who makes them.
 

Spqreddie

Well Known and Active Website User
VOC Member
I spoke at the phone with Patrick from Puca this morning. and i have ordered my two 3 inches instruments.
He said he will built them and send me a pictures for acceptance before shipping. he said it will take 10 or 15 days for my special order.
As well i can not say anything yet regarding quality as is the first time i am dealing with them, but as soon as the instruments received i will update you all here.

I have informed him that we are discussing his product here and told him to consider registering here on the forum to follow the discussions and answer to the queries. not sure he will do.
 

Glenliman

Well Known and Active Website User
VOC Member
The tach at bottom was supplied by Tom Kullen in the US.
Prior to that I waited for a year or so for stock to reappear at the Spares Co., no luck.
It worked perfectly for two weeks then went haywire.
Tom Kullen was certain that the issue was with my installation, so much testing and checking went on. It did seem likely that the problem was self-inflicted, so I temporarily mounted the instrument on my other Rapide as a check. That bike has a totally different style of ignition, D type distributor. Great care was taken with the temp installation, but the problem persisted.

Finally, I was contacted by another Vincent owner in Australia who had the same tach and the same problem. Tom said that these two problematic instruments were the only ones he had seen after a large number of sales. He was doubtful that there was anything wrong with the instruments, he still felt that something amiss with the installations was creating these problems. He also stressed that there were no new units available to exchange with, so we would be best to figure out a way to get my unit working somehow.
I still don't quite understand how that situation could occur.
Shouldn't a manufacturer always have a few spares on hand?
Or the facility to provide one after a short wait?

Anyway, Tom figured that if something had happened to the instruments, that must be due to the some unique situation with the Vincent ignition.
The problem with that theory is that while the Australian owner's bike has a stock mag, stock Vincent ignitions aren't really much different from other magneto equipped bikes of that era. Also, my 47 Rapide has a converted Norton twin point twin coil setup. The 49 has a D distributor as mentioned, so we were seeing the same problem with 3 bikes, all with different ignitions.
After exhausting the possibilities of improper installation, it did not seem likely that it was a Vincent problem, things were instead pointing at a Smith's Electronic instrument problem. The Rapide owner in Oz had also done a ton of time consuming troubleshooting . He came to the same conclusion.
Eventually we both sent our instruments back to Tom and he forwarded them to Smith's in the UK.
In due course they were repaired and sent back. Apparently both suffered burned out diodes.
A small resistor was added to the wiring on reinstall.
So full marks to Tom and Smith's for eventually doing the right thing regarding warranty and repair.
After spending days on all the troubleshooting, there was in no hurry to reinstall the thing and suck up more days, should it fail to work properly. Afterall, I purchased it in July 2014, had trouble 2 weeks later and struggled with the troubleshooting on and off for over a year before Puca agreed to take the tach back for a look. By the time it arrived in a repaired state I had owned it for a year and a half, out of which it worked properly for a total of two weeks.
So I left the repaired unit in a box for about a year until I finally got up the interest to reinstall it.

So far so good.
I think it looks just fine with the original Smith's 5" beside it. I'm not a stickler for original details anyway and this bike is the kind that gets low murmurs of disapproval when inspected by the conkers crowd.
80mm case. Puca/SmithIMG_20190521_092937.jpg

Glen
 
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Cyborg

Well Known and Active Website User
VOC Member
some of you say you couldn't get an answer from Puca? the guys do answer their mails ....well so far to me they have...are you using the right address? (smiths@puca.co)
Can't speak for anyone else, but I used the correct email address for Puka. I suppose if I pursued it, an answer would have been forthcoming eventually. However... given the fact that he told VOC spares that "one was coming" for an entire year and then ultimately said it no it wasn't, led me to believe I was flogging a dead horse. No matter what transpired, I don't think there is a valid excuse for a years worth of empty promises. Quality or no quality.
 
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Cyborg

Well Known and Active Website User
VOC Member
As for getting a matching set, (because of the situation), the fellow from CAI gave me a break on the price, so a speedo is on its way. For the Mongrel Comet, it doesn't matter that they are slightly larger plus the fact that both Puka and CAI speedos come with a digital odometer makes the difference in size a moot point for my situation.
 

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