Search found 306 matches

by Lars
Thu Sep 24, 2020 6:32 pm
Forum: Classified - Wanted & Sale
Topic: Formichino leg shield with tubing?
Replies: 1
Views: 58

Re: Formichino leg shield with tubing?

Richard, ' The tubing (crash bars) are available, newly manufactured in polished stainless steel from the Rumi Club, UK: http://www.motorumiclub.co.uk/codfish_008.htm The floorboards/leg shields are just flat sheets of aluminium, cut and formed to fit over the crash bars. They should be fairly easy ...
by Lars
Fri Sep 11, 2020 6:38 am
Forum: Cafe Rumi
Topic: 3 year project complete, well, almost!
Replies: 12
Views: 468

Re: 3 year project complete, well, almost!

Beautiful bike, Ian. Superb restoration! Congratulations!

Lars
by Lars
Sat Aug 22, 2020 9:20 pm
Forum: Cafe Rumi
Topic: In Switzerland with Rudolf assembling a Formichino
Replies: 17
Views: 836

Re: In Switzerland with Rudolf assembling a Formichino

Looks fantastic. Congratulations to both of you - and of course to the lucky owner!

Those early Formichinos with the one-piece rear body look particularly clean and nice.
This one is a beauty.

Lars
by Lars
Fri Aug 21, 2020 5:27 pm
Forum: Technical: Questions and Solutions
Topic: Condensors
Replies: 9
Views: 730

Re: Condensors

Yes, that is to be expected. Good to know. A few words about condensers, to adress the question in this thread: The people selling these condensers are not telling us anything useful when they say "6V or 12 V condenser". Makes no sense, really. A condenser is just a capacitor, and they are always de...
by Lars
Fri Aug 21, 2020 5:13 pm
Forum: Technical: Questions and Solutions
Topic: Timing
Replies: 2
Views: 286

Re: Timing

Good to hear. Thanks for letting us know the reason.
by Lars
Fri Aug 21, 2020 5:09 pm
Forum: Cafe Rumi
Topic: In Switzerland with Rudolf assembling a Formichino
Replies: 17
Views: 836

Re: In Switzerland with Rudolf assembling a Formichino

Hi Hugo, Looks great. Nice motorcycle gathering and beautiful scenery! The Formichino also seems to be coming together quickly and looking very good. The two of you work together very well - with or without aquavit, it seems! Rudolf, fantastic restorations! Both bikes look spectacularly beautiful. L...
by Lars
Tue Jul 28, 2020 10:40 pm
Forum: Technical: Questions and Solutions
Topic: Connecting up the coils to the stator plate
Replies: 2
Views: 325

Re: Connecting up the coils to the stator plate

I have never seen this type of ignition plate, but I am aware that this configuration did exist. It appears that you have the arrangement with dual condenser in the same housing. So, when you say that the orange wire is connected to the back of the condenser, it means that it is connected to condens...
by Lars
Sun Jul 19, 2020 8:27 am
Forum: Technical: Questions and Solutions
Topic: crank shaft specs.
Replies: 12
Views: 919

Re: crank shaft specs.

Hi Lars Thanks for the thread information, Parmakit used to use 12.125mm while Rumi was 12.50mm. So they have finally brought them to the Rumi standard! Ian Hi Ian No they did not! Forgive my complete ignorance about this, I had no idea that the Parmakit threads were different from the orignal Rumi...
by Lars
Fri Jul 17, 2020 8:53 pm
Forum: Technical: Questions and Solutions
Topic: crank shaft specs.
Replies: 12
Views: 919

Re: crank shaft specs.

The Parmakit crank I bought was a direct drop-in with threads identical to the old one in both ends. They also supplied a nut for the clutch side, for some reason, but I did not use it. The old one fit perfectly well. The only adaptation I had to do was to shave off 1 mm in height of the woodruff ke...
by Lars
Thu Jul 16, 2020 9:03 am
Forum: Technical: Questions and Solutions
Topic: crank shaft specs.
Replies: 12
Views: 919

Re: crank shaft specs.

I can not help you about the crankshaft specs, but perhaps someone else will pitch in with that information. But have you considered just getting a new crankshaft assembly from Parmakit? They are expensive, at around 478 Euros (without VAT, plus shipping), but they come complete with new inner seals...
by Lars
Thu Jul 16, 2020 8:34 am
Forum: Technical: Questions and Solutions
Topic: engine removal
Replies: 14
Views: 3811

Re: engine removal

Thanks UHJ200, Just removed the engine, " Stay Strong" makes sense! I have both surface plates and dial indicator. In as much as the air " escaping" through the vent hole on top of the transmission when tested through the left air intake port, it would appear to me that the loss may be through the ...
by Lars
Mon Jun 29, 2020 2:54 pm
Forum: Technical: Questions and Solutions
Topic: Adjust ignition - electric start
Replies: 2
Views: 395

Re: Adjust ignition - electric start

Hi Martin
I have no experience with Dyna Start systems, but I can not see how it would make any difference to the timing of the ignition. So, if the points just start to open at around 2 mm BTDC, that should be fine. Aiming for about 0.3 mm gap when fully opened should also be fine. / Lars
by Lars
Mon Jun 29, 2020 2:51 pm
Forum: Technical: Questions and Solutions
Topic: Dry sparkplugs
Replies: 24
Views: 2331

Re: Dry sparkplugs

No problem, Martin. Any time. / Lars
by Lars
Tue Jun 23, 2020 7:51 am
Forum: Technical: Questions and Solutions
Topic: Dry sparkplugs
Replies: 24
Views: 2331

Re: Dry sparkplugs

Hi again Ren, I should just add that the flexible hose I mentioned is taken from a standard compression test kit. The type of compression tester with different hoses for different spark plug threads. I then made up the connection from that hose connector to the pressure/vacuum tester. Other users ha...
by Lars
Tue Jun 23, 2020 7:27 am
Forum: Technical: Questions and Solutions
Topic: Dry sparkplugs
Replies: 24
Views: 2331

Re: Dry sparkplugs

Hi Ren,
No, in the spark plug hole. The flexible hose in the kit has a spark plug thread in one end, and connection the the manometer in the other. Keep the piston at the bottom when you test, so that the transfer ports are open.
Best,
Lars
by Lars
Fri May 29, 2020 5:50 pm
Forum: Technical: Questions and Solutions
Topic: Insert battery
Replies: 9
Views: 1106

Re: Insert battery

I agree that the power is limited and, with the headlight always on, there is not much power left to do any damage. Well, good to know that you made it work the simple way. Elie, or anyone else interested, here is the modification we are talking about: One end of the lighting coil winding is normall...
by Lars
Fri May 29, 2020 12:39 pm
Forum: Technical: Questions and Solutions
Topic: Insert battery
Replies: 9
Views: 1106

Re: Insert battery

I did say only half-wave rectification "unless you modify the coil", and by that I meant to undo the ground side of the coil and bring out a separate wire to get the coil floating to ground. Which is what you did and described. Good to know that it can be done without too much difficulties, and that...
by Lars
Fri May 29, 2020 7:15 am
Forum: Technical: Questions and Solutions
Topic: Insert battery
Replies: 9
Views: 1106

Re: Insert battery

I am working on the electric of the Rumi, about this some questions. Is the voltage supplied by the motor ac or dc?, if i want to insert a battery then I need to put a rectifier to power the battery if voltage is ac? What voltage does the motor in volt and amp?, does any of the members have a drawi...
by Lars
Sat May 23, 2020 4:50 pm
Forum: Technical: Questions and Solutions
Topic: Engine doesn't sound as it should ... (BIG SURPRISE INSIDE)
Replies: 37
Views: 3738

Re: Engine doesn't sound as it should ... (BIG SURPRISE INSIDE)

Hi again, Hugo. This tool looks nice for about 22 Euros. 10 mm too tight for the Rumi flywheel, though. Should be possible to modify, or find a larger version. https://www.rinab.nu/moped-klass-2-a/Honda/MB-50/Verktyg/Mothaall-svaenghjul.htm?sClickID=GoogleShopping-31&gclid=EAIaIQobChMIld2xtqfK6QIVQq...
by Lars
Sat May 23, 2020 4:28 pm
Forum: Technical: Questions and Solutions
Topic: Engine doesn't sound as it should ... (BIG SURPRISE INSIDE)
Replies: 37
Views: 3738

Re: Engine doesn't sound as it should ... (BIG SURPRISE INSIDE)

I understood what you meant, Hugo. You were talking about the key for the shaft. But that does not change my dislike for the castle nut, requiring a special tool (which I do not have!) and split pin - for no good reason. Only my opinion, too. I am just glad my Junior engine has the better solution,...
by Lars
Sat May 23, 2020 8:31 am
Forum: Technical: Questions and Solutions
Topic: Engine doesn't sound as it should ... (BIG SURPRISE INSIDE)
Replies: 37
Views: 3738

Re: Engine doesn't sound as it should ... (BIG SURPRISE INSIDE)

I understood what you meant, Hugo. You were talking about the key for the shaft. But that does not change my dislike for the castle nut, requiring a special tool (which I do not have!) and split pin - for no good reason. Only my opinion, too. I am just glad my Junior engine has the better solution, ...
by Lars
Fri May 22, 2020 2:21 pm
Forum: Technical: Questions and Solutions
Topic: Engine doesn't sound as it should ... (BIG SURPRISE INSIDE)
Replies: 37
Views: 3738

Re: Engine doesn't sound as it should ... (BIG SURPRISE INSIDE)

always good when you find the definite cause to a problem :wink: . reading this reminds me to ask - I do not like the idea of the split pin on the flywheel nut, if you cannot reach the position to match the slots in the nut with the hole in the crankshaft without overtightening it requires you to b...
by Lars
Thu May 21, 2020 8:38 am
Forum: Technical: Questions and Solutions
Topic: Engine doesn't sound as it should ... (BIG SURPRISE INSIDE)
Replies: 37
Views: 3738

Re: Engine doesn't sound as it should ... (BIG SURPRISE INSIDE)

What a surprise. You have had a Rumi with elctronic CDI ignition all along, without knowing it! I would never try to start an engine if I heard and felt the piston hitting. Find out where it hits and do whatever it takes to get the necessary clearance first. The cracking or sizzling sound you hear f...
by Lars
Wed May 20, 2020 2:16 pm
Forum: Technical: Questions and Solutions
Topic: Replacing CEV switch
Replies: 35
Views: 3452

Re: Replacing CEV switch

Sorry, you beat me to it. Glad it worked out!
by Lars
Wed May 20, 2020 2:15 pm
Forum: Technical: Questions and Solutions
Topic: Replacing CEV switch
Replies: 35
Views: 3452

Re: Replacing CEV switch

Yes, that should be correct. From the photos of older, rusty example of the switch which you opened up, it does look like no. 4 is indeed the horn switch. I would verify with the ohmmeter by pushing the horn button. No. 4 should then read 0 ohms to ground (housing and bracket). But it looks right, s...
by Lars
Wed May 20, 2020 12:40 pm
Forum: Technical: Questions and Solutions
Topic: Replacing CEV switch
Replies: 35
Views: 3452

Re: Replacing CEV switch

Sounds good and makes sense.