Tech

Darrell Taylor continues his look at the two-stroke top-end, this month delving into squish band width and MSV, and starts to put some of the pieces of the power puzzle together… A commonly used phrase in head design is ‘squish clearance’ but ‘squish velocity’ is a term that will be new to some, it is…

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Jordan from YGSC recently encountered a problem with his engine being underpowered and not revving properly. He first suspected jetting, but we soon set him on the right path, as he explains… Recently, I’ve been struggling to diagnose a mysterious ‘stuttering’ of my engine, which is akin to having a rev limiter fitted when I…

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Cheap power, using old school tuning techniques, tested on a dyno…to separate fact from fiction. If you saw the first instalment in last month’s edition then you’ll already be up to speed (pardon the pun) on the nature of this section. Most scooter owners have a desire at one time or another to get the…

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Out of sight, out of mind? If it lets go, it’ll wrap around your sprocket and launch itself through your engine casing! Time to look at the transmission chain… The transmission chain links the front sprocket and cush-drive to the rear crown wheel on a Lambretta engine. Unlike most transmission chains on two-stroke engines which…

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The second part in our series dedicated to painting scooters, last month we covered prep and primer, this month it’s colour coats and lacquer… Preparation is EVERYTHING when it comes to painting. Nothing reflects the quality of your final finish more than the preparation stage. So if you missed last month’s edition, I strongly suggest…

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Tuning scooters and painting scooters, we love to do them both. In this series we will explain the full process behind painting your machine and what’s involved in achieving a high quality finish. Unless the paint job on your scooter is either a) of historic value, or b) in such good nick that it requires…

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Every month we will offer a small piece of basic yet essential advice to scooter owners. This month: don’t hole a piston – fix your fuel lines! The scooter fuel line only has one simple task, to supply the carburettor with petrol from the fuel tank. Unfortunately it is often overlooked and in some cases…

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Darrell Taylor continues his series on compression and ignition by considering the various squish designs that have been used to increase the efficiency, performance and safety of engines over the years. Last month’s article on compression briefly touched on squish clearance, which we will now cover in more detail this month. For those who missed…

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Each month we’ll be visiting a scooter shop somewhere in this wide world of ours – whether its speciality be restos or racers, engineering or basic servicing – and heading into the workshop to find out what the people there consider essential to keeping it running smoothly. This month we dropped in on CBS Whitton……

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Cheap power, using old school tuning techniques, tested on a dyno to separate fact from fiction. Tuning components for Lambretta and Vespa scooters have never been in such plentiful supply if the fancy takes you and you have available funds… the array of shiny tuning-exotica is really quite astounding.   Vespa has always had the…

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