Search found 672 matches

by mbmm350s
17 Jul 2023 20:24
Forum: Tre e mezzo
Topic: Supercharged 350 Morini drags a sidecar 110.9 mph!
Replies: 13
Views: 2569

Re: Supercharged 350 Morini drags a sidecar 110.9 mph!

Brilliant, well done
110 mph wouldn't be bad from a 350 Morini without a side car
More pics on Instagram?
Mark
by mbmm350s
17 Jul 2023 14:41
Forum: Tre e mezzo
Topic: Jetting issue?
Replies: 39
Views: 11165

Re: Jetting issue?

Hi Matt, You said that the pickup didnt sit flat, so we assumed that the cause is that the inner spigot of the pickup is contacting the the face of the oil seal, if this isn't the case then I don't understand. Please ensure that the oil seal is fitted as per the workshop manual as John says, also th...
by mbmm350s
13 Jul 2023 10:31
Forum: Tre e mezzo
Topic: Jetting issue?
Replies: 39
Views: 11165

Re: Jetting issue?

Hi Matt, In normal dry air the spark gap that a normal ignition system will jump is at least 5mm, that is why we bare the end of a lead and check. This is a standard check. The voltage required to jump a gap inside an engine, indeed any space where air is compressed increases with compression ratio....
by mbmm350s
10 Jul 2023 14:49
Forum: Tre e mezzo
Topic: Jetting issue?
Replies: 39
Views: 11165

Re: Jetting issue?

Matt, Let's get ignition sorted first. Ming is spot on there, the generator winding resistance absolute value is of little help if you don't know what it's manufactured value was. If you have had it professionally rewound then they would have given you a test report with the resistance value quoted....
by mbmm350s
05 Jul 2023 20:16
Forum: Tre e mezzo
Topic: Jetting issue?
Replies: 39
Views: 11165

Re: Jetting issue?

Hello Matt, I don't know where you get the information that a 79 sport has 98 main jet. That might be the case for USA Emissions spec (California) but these have a sealed airbox and in later versions a different airbox, please don't try it even if it fixes something its just wrong. The "star&q...
by mbmm350s
05 Jul 2023 20:08
Forum: Tre e mezzo
Topic: Jetting issue?
Replies: 39
Views: 11165

Re: Jetting issue?

Hello Matt, I don't know where you get the information that a 79 sport has 98 main jet. That might be the case for USA Emissions spec (California) but these have a sealed airbox and in later versions a different airbox, please don't try it even if it fixes something its just wrong. 79 onwards A and ...
by mbmm350s
22 Jun 2023 09:55
Forum: General motorcycling topics
Topic: Does anything strip paint off 3 1/2 Strada engine cases
Replies: 10
Views: 4558

Re: Does anything strip paint off 3 1/2 Strada engine cases

carb cleaner used to contain Toluene, now its seems its xylene, which isn't as good, but Xylene used to be in Hammerite thinners and now it isn't, so I use carb cleaner to thin/clean Hammerite paints. I buy Dichloromethane for dissolving epoxy resins/glues, for which it is allowed, from a jewelery s...
by mbmm350s
20 Jun 2023 10:04
Forum: Bikes and bits wanted
Topic: Strada top yoke and rear sets.
Replies: 14
Views: 5913

Re: Strada top yoke and rear sets.

With respect to top yoke My friend runs a Norton/Matchless hybrid in Pre-65 scrambles, these commonly have Marzocchi 35mm, or Ceriani forks. His top yokes look likely to work for you. Everything seems to be interchangeable. You just need to confirm the top yoke centres and stem bore size. This site ...
by mbmm350s
20 Jun 2023 09:42
Forum: Tre e mezzo
Topic: oil dipstick position
Replies: 8
Views: 1731

Re: oil dipstick position

Spot on John, on any old vehicle never assume the accuracy of the dip stick, its the sort of thing that gets mixed up in boxes of parts or lost and replaced with the wrong one and yes there are different dipsticks for morinis. I have glass 1 litre measuring cylinder.
by mbmm350s
18 Jun 2023 07:51
Forum: The 500
Topic: Oil leak
Replies: 19
Views: 7378

Re: Oil leak

Hi Paul, To be fair it sounds like as an experienced Morinist you have done or had done pretty much everything. I wonder if the fuel leaking past the valve was just caused by disturbed crud which has now been flushed out. I mentioned checking that the fuel filters are in place, i once found a spare ...
by mbmm350s
16 Jun 2023 07:19
Forum: The 500
Topic: Oil leak
Replies: 19
Views: 7378

Re: Oil leak

Hi Paul, With the floats jamming sometimes you can see like witness marks on the float bowl, at the front or sides. Do you have white or brown type hollow floats or the solid brown floats. The problem is most apparent with the white floats. For sure its a good idea to change the needles and needle v...
by mbmm350s
15 Jun 2023 15:45
Forum: 250 Vee
Topic: Ignition timing issues
Replies: 14
Views: 4334

Re: Ignition timing issues

Hi Barry, Its hard to be sure, but that does look like a genuine black pickup. The device in the choc block is another diode, this is in the green lead to the switch and is used to prevent a fault in the switch from getting 12V onto the ignition circuit, if 12V gets onto the green wire it kills the ...
by mbmm350s
15 Jun 2023 14:38
Forum: The 500
Topic: Oil leak
Replies: 19
Views: 7378

Re: Oil leak

Hi Paul, I have had jammed floats on two Morinis in the last two years, which was never a problem before. This seems to occur only if the bike is left standing. The fault is it seems caused by excess swelling at the seam where there is flashing on the white or brown floats that are the hollow type c...
by mbmm350s
14 Jun 2023 07:14
Forum: 250 Vee
Topic: Ignition timing issues
Replies: 14
Views: 4334

Re: Ignition timing issues

Hi Barry, Hope it will be sorted soon, you are right about the coils all windings breakdown over time, and the spark will be weak and even retard. I didn't think the black pick up was compatible with the red transducers, and the advance then retard problem is the problem you get when the diode is mi...
by mbmm350s
13 Jun 2023 13:01
Forum: 250 Vee
Topic: Ignition timing issues
Replies: 14
Views: 4334

Re: Ignition timing issues

Hi Barry, The fault you describe can also be a fault with the pickup , so please check whether the fault follows the transducer (CDI) box if you swap them over, or whether it stays on the front cylinder. If it follows the transducer then I would advise to buy new ones in a pair, because any second h...