Search found 1529 matches

by EVguru
18 Dec 2023 16:19
Forum: Bikes and bits for sale
Topic: Pair of 350/400 cylinder heads NOS
Replies: 0
Views: 827

Pair of 350/400 cylinder heads NOS

A pair of unused late style cylinder heads, bare as shown. £250 collected from Luton, postage at extra cost. https://scontent-lhr6-2.xx.fbcdn.net/v/t39.30808-6/411473424_24498179323161306_5623199204727418403_n.jpg?_nc_cat=105&ccb=1-7&_nc_sid=c42490&_nc_ohc=B4UjnhoFBTAAX_MniWW&_nc_oc=...
by EVguru
18 Dec 2023 16:15
Forum: Bikes and bits for sale
Topic: Complete starter assembly.
Replies: 0
Views: 815

Complete starter assembly.

Just removed from an Excalibur 501 engine (Ducati ignition). I think this is the cleanest looking starter I've ever seen and there's little wear on the shoes. The outer casing is quite shabby and probably indicates that the bike (and therefore starter) has had little use. £250 collected from Luton, ...
by EVguru
15 Apr 2023 18:20
Forum: The 500
Topic: Tyres
Replies: 14
Views: 19463

Re: Tyres

Is everyone sticking with 110/80 or have others fitted 120/80?? Cheers. People don't usually fit a 110/80, it should be a 110/90. The rims are already narrow for that size, going wider is going to be better. It's often instructive to look up manufacturers recommended rim widths. Most will respond t...
by EVguru
16 Dec 2022 20:56
Forum: Singles
Topic: 125 WITH NO SPARK
Replies: 117
Views: 53509

Re: 125 WITH NO SPARK

Older 2 strokes usually had fixed ignition timing. My Settebello racer didn't come on cam till over 6000rpm, so that also made do with tming fixed at full advance. I'll say again, the CDI boxes fire when a fixed voltage is exceeded on their trigger input, the advance comes from the shape of the pick...
by EVguru
08 Sep 2022 18:41
Forum: Singles
Topic: 125 WITH NO SPARK
Replies: 117
Views: 53509

Re: 125 WITH NO SPARK

They were all 6V (unless modified), as were the 250 singles and twins.
by EVguru
02 Sep 2022 18:37
Forum: Singles
Topic: 125 WITH NO SPARK
Replies: 117
Views: 53509

Re: 125 WITH NO SPARK

ALL of the CDI modules simply fire when the voltage on the trigger input rises above a certain level.

The advance comes from the shape of the voltage produced by the pickup and the fact the voltage produced by the pickup increases with rpm.
by EVguru
01 Jan 2022 22:23
Forum: Tre e mezzo
Topic: Twin Disc Master Cylinder
Replies: 33
Views: 11195

Re: Twin Disc Master Cylinder

...but not for the master cylinders. Norbert says 16mm for single disc, I am saying 16mm for single disc, you have quite clearly stated 14mm for a single caliper. Am I missing summat? You might want to read what Norbert and I wrote agian. 14mm is standard for the 250 twin, which uses the same wheel...
by EVguru
01 Jan 2022 20:24
Forum: Tre e mezzo
Topic: Twin Disc Master Cylinder
Replies: 33
Views: 11195

Re: Twin Disc Master Cylinder

Norbert and I are effectively saying the same thing.

The early bikes use the non-handed Grimeca 1010 caliper, later bikes the 1025. Both use the same 41mm piston and use the same seals.
by EVguru
01 Jan 2022 16:47
Forum: Tre e mezzo
Topic: Twin Disc Master Cylinder
Replies: 33
Views: 11195

Re: Twin Disc Master Cylinder

16mm cylinder for twin calipers.

14mm for a single.

If travel is an issue with either of these combinations, then you have a problem elsewhere.

Still quite a heavy lever by modern standards, many will prefer a 12, or 12.7mm (0.5") for a single and perhaps the 14mm for twin.
by EVguru
22 Nov 2021 09:38
Forum: Off road bikes
Topic: 501 camel carb jets
Replies: 12
Views: 5694

Re: 501 camel carb jets

The weight of the float will determine how deep it sits in the fuel. The position of the tab that operates the needle valve will determine the float height at which the fuel is shut off. You will get the same fuel height in the float bowl for a relatively wide combination of float weight and tab pos...
by EVguru
19 Nov 2021 20:22
Forum: Off road bikes
Topic: how much difference between kanguro and strada engine?
Replies: 23
Views: 9276

Re: how much difference between kanguro and strada engine?

Gillardoni barrels have larger liner spigots and the matching crankcases have correspondingly larger barrel mouths to suit.

Barrel heights and pushrod lengths are slightly different too.
by EVguru
06 Nov 2021 11:35
Forum: Tre e mezzo
Topic: New wire harness
Replies: 9
Views: 4203

Re: New wire harness

I make my own harnesses as needed, but if I were to use one of those, I'd replace the Brass spade connectors with Tin plated versions.
by EVguru
03 Nov 2021 13:07
Forum: Tre e mezzo
Topic: Electric start
Replies: 16
Views: 7730

Re: Electric start

It's an eccentric stop to help set the chain tension.
by EVguru
30 Oct 2021 19:31
Forum: Pre V Twin models
Topic: Corsarino ZT
Replies: 3
Views: 4297

Re: Corsarino ZT

The two screws are the slide stop and idle mixture. Off the top of my head, I can't remember if the idle screw is an air or fuel adjustment (turn opposite ways to achive the same mixture change). If the idle stop isn't affecting the idle speed, they you may have the slide hanging on the throttle cab...