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So if you have a MY21 then those who purchased last year will be "L"
I'm not so sure about that. My Crosstar (purchased July 2020) also features "M" as 10th digit in the VIN.
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Honda Jazz Mk1 2002-2008 / Re: Theoretical gearbox modification
« Last post by embee on Today at 08:36:25 PM »
As Jocko says, drag force is proportional to speed squared, drag power is proportional to speed cubed. Going faster needs more fuel as a rule.
 The significant factor in which gear you use (and hence engine speed) is that the brake specific fuel consumption (BSFC), the fuel used to produce one kW.hr of energy at the wheels, generally improves with more load and less speed (up to a point).
The BSFC map below is an example of a car petrol engine.
The "road load" in 4th gear is shown dotted to give an example of where the engine runs as vehicle speed increases. Higher gears will show as curves above this example, lower gears will be below it.



The top line in bold is essentially the maximum torque curve at wide open throttle measured in brake mean effective pressure BMEP (Bar), this is in essence the torque per litre with a constant factor applied (Nm = 7.958 x BMEP x swept volume). BMEP alllows you to compare different engines directly, taking swept volume out of it.
The lines curving from top left down towards bottom right are constant power lines (see right hand axis). If you run a car at a given speed you need a fixed power, lets say 30kW. Follow the 30kW line up towards the left and you'll see that at for example 4000rpm (low gear) the BSFC is about 400 g/kW.hr.
If you use a higher gear and run the engine at say 3000rpm, the BSFC for 30kW is around 300 g/kW.hr, and at 2500rpm it is about 270 g/kW.hr
Thus you can see that for cruising at steady speed using a higher gear generally speaking puts the engine nearer the "eye" of the map and thus gives a lower amount of fuel needed to produce the required power (and thus energy).
If you go too far it can make it worse, but that tends to be at extreme low rpm and extreme load (torque). For a typical petrol engine it is usually not beneficial to run at high load much below around 1500-1750rpm (heat losses in the slow cycles means lower thermal efficiency), and at near full load (open throttle) the engine usually runs slightly rich so fuel efficiency reduces.
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Off Topic (Non-Honda) / Re: Electric cars
« Last post by swhull on Today at 08:34:49 PM »
Elon Musk must be proud...
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Off Topic (Non-Honda) / Re: Electric cars
« Last post by Jocko on Today at 08:29:23 PM »
Two new entrants for the Darwin Awards 2021:

https://www.bbc.co.uk/news/technology-56799749
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Honda Jazz Mk1 2002-2008 / Re: Hit by Minicab!
« Last post by richardfrost on Today at 07:55:48 PM »
I wonder how a Tesla Autopilot would read the road markings there! They are disgraceful.

Glad you are both uninjured after this incident.
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CHA144 is the correct one for disc brake, that's what I ordered.
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Thank you, I have ordered a Comline product from Ebay and the cost was less than £30 thanks to  a voucher offer and free postage.
The Comline part is CHA144 stated as equivalent to Honda part number 42200-SAA-G51, as found on the  Lings Honda  parts finder for a 2006 Honda Dsi 1.4SE, rear discs brakes with ABS
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Don't know whether it means any thing, but the VIN continues, MS22****.
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I havenít noticed it moving, but will check next time Iím out
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Honda Jazz Mk1 2002-2008 / Re: Hit by Minicab!
« Last post by UKjim on Today at 06:38:17 PM »
Can't you not sue the council for not making roaf signs more visible if the taxi guy was to come up with the excuse of he didn't see the road markings?
For the amount of repair cost, the short answer is no.

The taxi driverís base is about 1/2 mile from the location, Iím sure road markings or not he is more than aware of the correct protocol at that roundabout. There are only 2 ways you can turn, left or straight/right, there are 3 lanes, you donít even need half a brain to deduce the left lane means left turn!
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