Search found 509 matches

by UHJ200
Sun Sep 23, 2018 5:25 pm
Forum: Technical: Questions and Solutions
Topic: How many kms/miles can be done .....
Replies: 10
Views: 1495

Fuel tanks

How many kms/miles can be done with a full fuel tank? Following on from Hugo's Forum question and my comment about a larger capacity tank, it occurred to me to suggest that it is worth considering such a project particularly if you are engaged on a re-build. Warning! You would need facilities not u...
by UHJ200
Sat Sep 22, 2018 4:56 pm
Forum: Technical: Questions and Solutions
Topic: How many kms/miles can be done .....
Replies: 10
Views: 1495

Re: How many kms/miles can be done .....

Not a Formichino but my Tipo did about 55mpg when I was commuting 40 miles each way to London. And that was mostly full throttle with a fully clad 6 foot 15 stone lump perched on top. One thing I was thankful for was the 1.3 gallon tank that I made to replace the rusted-out one that came with the ma...
by UHJ200
Thu Aug 09, 2018 10:28 pm
Forum: Cafe Rumi
Topic: Colour
Replies: 11
Views: 2657

Re: colour

Do you have to paint a Rumi Junior Gentleman red, most others are, my one came as trolling chassis in a lightish Rumi blue as hugo i believe mentioned in an earlier post. I am thinking of painting mine in metallic Subaru blue, with gold panels on tank. Any comments welcome. Only the ones that live ...
by UHJ200
Fri Jan 05, 2018 11:39 pm
Forum: Technical: Questions and Solutions
Topic: Importing a bike. Advice needed.
Replies: 27
Views: 7687

Re: Importing a bike. Advice needed.

Plenty of room inside the nacelle for a mounted box containing five U2 sized NiCads or a Honda C50 moped sized battery. There is one major advantage in having a battery on board: You do not have the flickering glow-worm lighting effect when on tickover, (sitting at traffic lights for example), a bat...
by UHJ200
Sun Dec 24, 2017 7:16 pm
Forum: Technical: Questions and Solutions
Topic: Project restoration Formichino
Replies: 60
Views: 35550

Re: Project restoration Formichino

I wouldn't worry about what's going on at bdc myself .
You have of course every right to your opinion but I will back mine with 50 years in the precision engineering game 23 of which concentrated on internal combustion engine research and development.
by UHJ200
Sun Dec 24, 2017 11:29 am
Forum: Technical: Questions and Solutions
Topic: Project restoration Formichino
Replies: 60
Views: 35550

Re: Project restoration Formichino

More important than top dead centre is the position of the piston crown at bottom dead centre.

The bottom of the exhaust port and that part of the piston crown adjacent to it should be line-on-line at bdc.
by UHJ200
Wed Dec 06, 2017 4:59 pm
Forum: Classified - Wanted & Sale
Topic: 10 inch wheels wanted.
Replies: 10
Views: 3063

Re: 10 inch wheels wanted.

Any idea of price? I suppose it depends on the size of the batch. Indeed! I only had contact with these people on another matter but while I was there they were kind enough to demonstrate what they could do. Sufficient to say that with 50+ years in the skilled end of the engineering game I was stil...
by UHJ200
Wed Dec 06, 2017 2:45 pm
Forum: Classified - Wanted & Sale
Topic: 10 inch wheels wanted.
Replies: 10
Views: 3063

Re: 10 inch wheels wanted.

I know where I can get them made but it would need to be a batch order, anyone interested?
by UHJ200
Sun Dec 04, 2016 4:13 pm
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 207418

Re: Bol D'Or - New Project

Hello Hugo, your ignition coils are not properly mounted, it must be an angle board, catalog chapter 10, part 15, then the problem is solved. My Tipo coils are mounted in much the same way as Hugo has them. There are differences in the drawing mounting and Hugo's (and my), coil mounting design. I a...
by UHJ200
Wed Nov 30, 2016 1:39 pm
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 207418

Re: Bol D'Or - New Project

hugo you can run off one battery as only power supply,just need live supply to each coil and one earth to engine. True but the idea of using two batteries is to separate as far as possible the two ignition systems. It is just possible that there might be some crossover as the existing flywheel syst...
by UHJ200
Sat Nov 19, 2016 10:07 pm
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 207418

Re: Bol D'Or - New Project

:D Everything in place now, cylinders, pipes and carburetors. Probably tomorrow I will give a test drive in the indoor parking at the basement of the building. It is raining outside. Water cooling next? :lol: Mark you, you are in good company, George Brown machined off all the fins from "Nero" his ...
by UHJ200
Mon Jun 10, 2013 8:59 pm
Forum: Classified - Wanted & Sale
Topic: Interesting big selection of Moto Rumi parts for sale
Replies: 21
Views: 13649

Re: Interesting big selection of Moto Rumi parts for sale

I will confess to a perverse sense of humour but never with the intention of cruelty and that line, in context, was just too good to miss! :twisted: I do not waffle; I do however make every effort to be accurate and unambiguous. “And so fare thee well: Thou never shalt hear herald any more.” (Henry ...
by UHJ200
Mon Jun 10, 2013 11:13 am
Forum: Classified - Wanted & Sale
Topic: Interesting big selection of Moto Rumi parts for sale
Replies: 21
Views: 13649

Re: Interesting big selection of Moto Rumi parts for sale

Hugo is correct these translator things do work but it is also good practice to take the translation and convert it back into English and check the result. If it does not make total sense then try different phrasing. It also helps to keep things as simple as possible; syntax can often be something o...
by UHJ200
Sun May 26, 2013 11:41 am
Forum: Cafe Rumi
Topic: My "new" old Bicarburatore
Replies: 1802
Views: 1078677

Re: My "new" old Bicarburatore

Bugger! I was halfway through a long treatise on how to remove it! :lol:

Said you were due for a bit of luck! :D

At least the thread is standard so a nice new allen screw would do nicely.

Onwards and upwards :!: :D
by UHJ200
Sun May 26, 2013 12:31 am
Forum: Cafe Rumi
Topic: My "new" old Bicarburatore
Replies: 1802
Views: 1078677

Re: My "new" old Bicarburatore

It never rains but it pours! :cry: Sad to say but you are going to have to start all over again! “Good ships, halfpennyworth of tar.” You’ve come too far for half measures now. That broken bolt is going to have to come out. Now you might get lucky, (you are about due for some), and find that it is ...
by UHJ200
Sat May 25, 2013 1:45 am
Forum: Cafe Rumi
Topic: My "new" old Bicarburatore
Replies: 1802
Views: 1078677

Re: My "new" old Bicarburatore

Aim for about 20% compression so work out the cross-section of your groove and the rubber then needs to be 20% bigger than that. That groove looks pretty good from here but if you can improve (smooth) the finish it will all to the good. Interestingly enough on of the sizes I have is 2,15mm diameter ...
by UHJ200
Thu May 23, 2013 10:36 pm
Forum: Cafe Rumi
Topic: My "new" old Bicarburatore
Replies: 1802
Views: 1078677

Re: My "new" old Bicarburatore

UHJ200 wrote: The round material I have is 2.6mm diameter to fit a groove 3.45mm deep x 6,14mm wide.
Now that's a load of cobblers! :oops: It's late, I'm knackered 'an getting cross-eyed, I'll check my references in the morning.

Oh! How I hate the bloody metric system :!: :lol:
by UHJ200
Thu May 23, 2013 10:24 pm
Forum: Cafe Rumi
Topic: My "new" old Bicarburatore
Replies: 1802
Views: 1078677

Re: My "new" old Bicarburatore

Currently you have no real points of reference. While it is apart it would be wise to measure everything up, you will then know what-is-what, where and by how much. Then at least you will have a starting point for corrections. Personally I'd like you to strip the cases including the selector drum an...
by UHJ200
Thu May 23, 2013 6:04 pm
Forum: Cafe Rumi
Topic: My "new" old Bicarburatore
Replies: 1802
Views: 1078677

Re: My "new" old Bicarburatore

You could always cut an "O" ring of sufficient diameter so that the circumference, when opened out spans the width of the cases. It will of course try to curl up and not stay straight but I'm sure you're up to teaching it manners! Is this the time to tell you I've got yards of the stuff? :twisted: :...
by UHJ200
Wed May 22, 2013 8:00 pm
Forum: Technical: Questions and Solutions
Topic: clutch lining
Replies: 5
Views: 3211

Re: clutch lining

Just measured over a couple of friction plates from what appears to be an unused clutch and they are coming up at 3,65 to 3.75mm thick.
by UHJ200
Wed May 22, 2013 5:44 pm
Forum: Technical: Questions and Solutions
Topic: Clutch Disc for Moto Rumi brand Surflex
Replies: 5
Views: 5815

Re: Clutch Disc for Moto Rumi brand Surflex

The friction material looks to be some sort of man-made composition stuff, the only question is; "How oil resistant is it?" Moto Rumi didn't fit their clutches with cork inserts by accident! I think I'd want it carved in stone from the manufacturers that the material can cope with life in an oil soa...
by UHJ200
Fri May 03, 2013 1:14 pm
Forum: Technical: Questions and Solutions
Topic: How to do a correct cylinders compression test
Replies: 11
Views: 4493

Re: How to do a correct cylinders compression test

Sound like you have got the idea, just keep winding until the needle goes no further. (Puff, pant, wheeze!) :lol: On the other hand if you can hold the green button in and crank at the same time you might get an idea of individual strokes if your eyes can keep up with the filckering needle at the sa...
by UHJ200
Fri May 03, 2013 12:00 pm
Forum: Technical: Questions and Solutions
Topic: How to do a correct cylinders compression test
Replies: 11
Views: 4493

Re: How to do a correct cylinders compression test

I spy a green button on the side of the unit, if it is the same as others that I have seen it is for pressure release, that in turn implies that there is a non-return valve in there somewhere. What this unit will show then is the peak obtainable pressure, put another way, the sum of several strokes....
by UHJ200
Fri May 03, 2013 12:43 am
Forum: Technical: Questions and Solutions
Topic: How to do a correct cylinders compression test
Replies: 11
Views: 4493

Re: How to do a correct cylinders compression test

I certainly sounds as if you are building up pressure in the manner of an air compressor, if this is the case then the result will not tell you what you want to know. Does the setup you are using have a non-return valve in the system by any chance? What you are seeking of course is the peak pressure...
by UHJ200
Thu May 02, 2013 2:21 pm
Forum: Cafe Rumi
Topic: Next winters (sensational) project!
Replies: 136
Views: 101451

Re: Next winters (sensational) project!

To UHJ - what is going on? Did you by mistake send your message to the RUMIm Forum - instead of to "house & Garden" (or worse...) I have my faults but being wrong isn't one of them, :twisted: save for anything to do with things even remotely electronic! :roll: As to the "House & Garden" jibe, (nice...
by UHJ200
Wed May 01, 2013 9:02 pm
Forum: Cafe Rumi
Topic: Next winters (sensational) project!
Replies: 136
Views: 101451

Re: Next winters (sensational) project!

I have used GRP much in the past (mostly for boats) and I agree, its very versatile. BUT - this time, I simply use a piece of metal tube, and weld it to a "base-plate" of the correct size! I will use shorter pipes, than the original manifold, to let the carbs. sit as close to the cylinders as well ...