Search found 1501 matches

by Lasse
Sat Aug 20, 2016 1:53 pm
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

Sorry, Hugo, I wasnt aware of, you did not have the threaded exhausts studs. But you can easily make some yourself, using a piece of 8 or 10 mm threaded rod! And to something more important: In order to be 100% sure of the ignition works (on the right cylinder) - avoid to use any ignition cap! Many ...
by Lasse
Sat Aug 20, 2016 11:01 am
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

About your "ignition troubles": Old ignition caps regularly fails - the same does ignition leads. I know you are a stickler for originality - and probably use old stuff? But, do try modern new ignition caps, but do not modern carbon core leads. For a test, you could utilize just a piece of insolated...
by Lasse
Sat Aug 20, 2016 10:56 am
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

Use "Locktite" red in the cylinders.
Then they will stay put - but if need be in future, be able to unscrew (with two nuts tightened together)
by Lasse
Sat Aug 20, 2016 9:26 am
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

It looks like you have an electrical problem, right.
But before you rip the single carburettor out from the motor - try to use the ignition from the (working) left cylinder!
If the right cylinder then fires - you have found the reason of the problem...
by Lasse
Fri Aug 19, 2016 3:08 pm
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

OK, Hugo - but I wouldnt be surprised if the motor started, if you just used the kick-start...
Why not try?
(You could use sneakers, so you did not touch the paintwork)
by Lasse
Fri Aug 19, 2016 12:49 pm
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

Hugo, a piece of wood under the frontwheel will do the trick!
Thickness? - so much as to render the floatbowl vertical
by Lasse
Wed Aug 17, 2016 9:05 am
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

Sorry to tell you - I do not consider this carburettor well suited to this kind of test! You need a carburettor, with the float bowl dead upright - otherwise, the float wont work in a meaningfull way... In principle, you can use any (modern) 22mm carburettor for testing - if you can get one at loan ...
by Lasse
Tue Aug 16, 2016 6:29 am
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

Good morning, Hugo - yesterday evening I wrote a wrong message to you! Forget about it, I was tired - and forgot, you cannot do as I suggested, with your type of carbs... Anyway, after some thinking, I found a simple way to test if the right carb receives too much fuel. Loose the two carbs on their ...
by Lasse
Mon Aug 15, 2016 5:26 pm
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

Thank you for mentioning this critical fact: "The ignition plug gets wet with gasolene"! So we have a completely different situation... The motor is drowned, therefore you have to give full throttle to let the air/fuel mixture be as close to normal as possible, to get the cylinder to start. By idle...
by Lasse
Mon Aug 15, 2016 3:11 pm
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

Nah - because you can use many different nuts, each of a certain weight, in easy experiments... Take your exsisting float, with its needle, and immerse it in water, then draw a line with a speedmarker, where the water level came to. Repeat with a nut on top of the float, then measure again. In my bo...
by Lasse
Mon Aug 15, 2016 1:27 pm
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

If you dont like to follow my advise in the first place - there is another simpler solution:
Just put a nut on top of the float - to make it a bit heavier.
Smart - huh?
by Lasse
Mon Aug 15, 2016 10:15 am
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

Hm, two of my floats could slide, but obviously not yours. Anyway, the help is "just around the corner" - and it works, because I have tried it myself (on my bicarburatore) I guess/hope, your float can slide on the float-needle?- but for now, just have one position - right? Next, take a very fine fi...
by Lasse
Sun Aug 14, 2016 10:09 pm
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

What you write gives good meaning. You have to open the throttle wide, in order to let as large as possible airstream create vacuum enough, to bring fuel up to the needle & needle jet. At idle, the airstream isnt strong enough to etablish fuel to the needle jet! The motor falters. I do not believe t...
by Lasse
Sun Aug 14, 2016 4:26 pm
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

Now, it looks like you just have two options: The carburetor To remagnetizize the flywheel (talking about the carburettor - the float-level is, as you well know, critical with these downdraught carbs. A bit too low, & then the right cylinder have to struggle for some time, to make vacuum enough, to ...
by Lasse
Sat Aug 13, 2016 12:43 pm
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

Hello, Hugo - just a stupid question...
As we know, that even new ignition plugs sometimes fails, or simply do not ignite properly.
Have you tried the simple solution, just to swap the plugs, to see if the situation improves?
by Lasse
Tue Aug 09, 2016 4:47 pm
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

Re-magnetization really makes sense! Think about it in another way: "The right side cylinder who has been condemned in some way, as beeing "bad", might really be the best one of those two cylinders"! Why that? Because a "weak" ignition spark might easily be killed by high compression... So the "bad ...
by Lasse
Fri Aug 05, 2016 9:07 am
Forum: Technical: Questions and Solutions
Topic: crank-case seals
Replies: 6
Views: 5056

Re: crank-case seals

I surrender! The picture of a lot of ruined crankshafts are most convincing... I must simply had been lucky, since I never experienced grooves in my various cranks - during time. Maybe the oil had preserved the seals - I dont know. I once used a product called "Gasket quell" or something. This produ...
by Lasse
Wed Aug 03, 2016 11:16 am
Forum: Technical: Questions and Solutions
Topic: crank-case seals
Replies: 6
Views: 5056

Re: crank-case seals

Quite new to me, that old rubber seals, impregnated with two-stroke oil, could make impressions onto a hardened steel crank axle. I had numerous old Villiers & TWN engined two-strokers in my earlier life. Even old and leaky, the seals never ruined any crank axles, the seals just performed badly... S...
by Lasse
Mon Aug 01, 2016 12:51 pm
Forum: Technical: Questions and Solutions
Topic: crank-case seals
Replies: 6
Views: 5056

Re: crank-case seals

Calm down, please... Its quite normal for the bicarburatore to spit fuel backwards, out of the carburettors - because of the great overlap in the portings. Try to run the motor for an hour or so, using higher & higher revs. You might see an improvement, as the carb. gets warm, the old fuel is used u...
by Lasse
Sun Jul 31, 2016 8:43 am
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

I understand your frustrations... You are doing "all the right things" to get to the core of the problem! Just one more thing you should do: Use a compression tester on the cylinders, in order to see if any "leaks" should materialize. I guess the easiest way to test this, would be to use a handheld ...
by Lasse
Thu Jul 28, 2016 9:08 am
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

Congratulations Hugo! I think you are right, let the motor get some hundred kilometers under its belt - then re-torque everything. Its not uncommon that the twin-carbed RUMIs can be hard to start, especially after prolonged rest periods... My CORSA (with twin 22mm carbs) was a swine to start - but e...
by Lasse
Wed Jul 20, 2016 6:32 am
Forum: Cafe Rumi
Topic: Surprised and wondering about Moto Rumi bolts
Replies: 191
Views: 149909

Re: Surprised and wondering about Moto Rumi bolts

Why did the Devils Grandmother finally die?
Because she was running out of excuses...
by Lasse
Mon Jul 11, 2016 8:28 am
Forum: Cafe Rumi
Topic: Bol D'Or - New Project
Replies: 430
Views: 210521

Re: Bol D'Or - New Project

Hi HUGO - for me there is one obvious "problem" - namely the carburetor... It sound as the cylinder get no fuel - and just by vigorous pushing, the fuel level inside the carb./emulsions tube can be persuaded by intense vacuum, to get up in the correct level. A quite easy way to determine if I am rig...
by Lasse
Tue May 31, 2016 9:42 am
Forum: Technical: Questions and Solutions
Topic: Speedometer VEGLIA
Replies: 32
Views: 20795

Re: Speedometer VEGLIA

Considerable better than I would exspect!
Well done.
by Lasse
Tue May 31, 2016 8:13 am
Forum: Technical: Questions and Solutions
Topic: Speedometer VEGLIA
Replies: 32
Views: 20795

Re: Speedometer VEGLIA

I do not hope you consider "cutting" a self adhesive sticker! The correct thing to do, is to make a perfect stencil, and let a silk screen printing company print a number of "speedo- faces" - just like it was done in the times whwn RUMI vehicles were in production... Think about a delicate Swiss wat...
by Lasse
Mon May 30, 2016 2:25 pm
Forum: Technical: Questions and Solutions
Topic: Speedometer VEGLIA
Replies: 32
Views: 20795

Re: Speedometer VEGLIA

Hello again, Rudolf - just for fun, I took your picture and spent 5 minutes retouching, to show how easily it is to improve it.
With a better photo, and more time - it could be perfect...
absolutely useable for a silk-screening printing company, to make a serie of speedometer innards.