Search found 296 matches
- Wed Nov 30, 2022 4:45 pm
- Forum: Lambretta Tech
- Topic: PHBL
- Replies: 2
- Views: 6496
Re: PHBL
The 40 slide can be easily converted leaner by material removal from the lower edge. I cannot remember the difference but it might be 1.0 mm, so please check. Converting a 50 to a 40 can be done but it is not so easy. However, if anybody remembers the scarcity of VHB slides in any other size than a ...
- Thu Oct 20, 2022 7:32 pm
- Forum: Lambretta Tech
- Topic: Carb experimentation, cold start issues.
- Replies: 20
- Views: 32637
Re: Carb experimentation, cold start issues.
It's a 24 mm UMA PWK copy. Piston ported 185 SR that's been cleaned up. I checked the jets and it had a 40 pilot and 100 main. Changed the pilot to 32 and it started first kick. So hopefully some progress but let's see, it's started first kick for a while in the past.... Sent from my SM-G985F using...
- Thu Oct 20, 2022 7:28 pm
- Forum: Lambretta Tech
- Topic: Carb experimentation, cold start issues.
- Replies: 20
- Views: 32637
Re: Carb experimentation, cold start issues.
Sorry very long delay in replying, was travelling a lot and haven't had time to work on the scoot which has been following its very erratic behaviour. I'll post the full carb setup in the next couple of days. In the meantime was going to ask is this https://www.miniriders.com/threads/keihin-pwk-cop...
- Mon Jul 25, 2022 10:55 pm
- Forum: Lambretta Tech
- Topic: Using Timing TDC Tool
- Replies: 2
- Views: 7512
Re: Using Timing TDC Tool
The problem with finding TDC is that there is a large angular movement for very little movement even with a DTI (Dial Test Indicator) axially in line with the bore. The phenomenon is referred to as 'dwell' & even though I have the kit which I use with central plug heads or, with head off, a spec...
- Sat Jul 02, 2022 11:03 am
- Forum: Lambretta Tech
- Topic: Side casing Hot
- Replies: 4
- Views: 5899
Re: Side casing Hot
It's very difficult to analyse a lot of the issues that come up on Forums such as this. Often, the only effective cure is to dismantle fully & re-assemble to the best of your ability & the knowledge available. Honestly, I can say that of all the engines that I have worked on, that apart from...
- Wed Jun 29, 2022 11:14 am
- Forum: Lambretta Tech
- Topic: Carb experimentation, cold start issues.
- Replies: 20
- Views: 32637
Re: Carb experimentation, cold start issues.
My thoughts have just been prompted by the other active Post on this forum: https://www.scooterotica.org/forum/viewtopic.php?t=41411&sid=781db5c56e0121a607066137f41d6ef7 I'd personally persevere with the PWK, but although they are great carburettors, they rely entirely on the Lambretta OEM type ...
- Sat May 14, 2022 12:32 am
- Forum: Lambretta Tech
- Topic: Drive chain
- Replies: 3
- Views: 8157
Re: Drive chain
Whatever the reasoning behind the belief that IWIS is the best, you will find no documented justification. For example. Type into your search engine something like: strength comparisons of 3/8" duplex chain The reason that there is no 'best chain' is because the construction is fundamentally th...
- Sat Dec 11, 2021 4:45 am
- Forum: Lambretta Tech
- Topic: lambretta pathfinders
- Replies: 2
- Views: 6445
Re: lambretta pathfinders
Dealers into creating their own specials used to modify the 'non-key-ignition' type rocker switch internally & fit that (with the appropriate throttle support) running through the keyed ignition switch. I may still have one somewhere, but finding it..... :roll: It was a P J Oakley modification. ...
- Wed Dec 01, 2021 2:59 am
- Forum: Lambretta Tech
- Topic: Winter upgrade
- Replies: 28
- Views: 22625
Re: Winter upgrade
Ball park figures for PWK pilots are 32 for piston ported, even though inlet timings have not been excessive. That's one of the advantages of 'stroking' the Rapido &, by the sounds of it, the Avanti. The reed valve TS 70 x 60 had a pilot size 50 which indicates that the reeds prevent the shuffli...
- Sat Nov 27, 2021 2:39 pm
- Forum: Lambretta Tech
- Topic: Winter upgrade
- Replies: 28
- Views: 22625
Re: Winter upgrade
This is the kind of volume elbow that I believe to be necessary: https://www.flickr.com/photos/151604592@N05/51706829613/in/dateposted-public/ BTW. The drainage vent in the elbow had been fitted when this elbow was used on Dell'Orto carburettors. It had wire wool as a breathable plug toward the bot...