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2003 Kymco Venox 250 - Page 3 Questions & Answers
What should the compression be for a 2000 kymco super 9 liquid cooled
a SCOOTER. year 2000. not cc (LOL)
cloned version of Honda's AF18E/AF16E Dio motor.
Air cooled, 49cc, single cylinder, 2-stroke
Compression Ratio: 7.2:1
it's in the manual. RTM" service manual
there is computer model to calc, this using compression ratio and cylinder volume
but
here is generic list.
my lawn mower is 100psi;. (and mopeds and outboard tiny motors and scooters tiny not 250cc hog scooters)
my old car is 150psi
my newer car with high 10:1 CR , is 200psi
a 49cc engine 7.2 CR is like 80psi.
low and expected. at that CR, 100 max
to get the reading correctly
good guage
fast cranked (kicked or starter turned)
let the meter peak and peak is spec. read peak PSI
and the CR is what matters.
and only on a warm engine, warm/hot not cold
cold is way less.
when warm the rings seat, cold they do not.(well)
7/4/2022 8:19:53 AM •
Kymco...
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41 views • 1 helpful votes
Kymco 700i side by side my dad 80 he uses this every day he went to start it has no spark to the plug he bought new coil still no spark what else could it be
Firstly, I don't know whether the vehicle has an immobiliser or other type of anti-theft or security system but it would be an unusual modern vehicle if it doesn't and if so it might be the cause of the non-starting.
I am not familiar with the model but I expect it has many similarities with most modern vehicles where there is an engine management computer that drives the ignition coil and fuel injection system after processing information from a number of sensors. Replacing components without testing can be expensive and fruitless and unfortunately that needs a measure of experience and some specialised equipment.
3/31/2019 8:58:34 PM •
Kymco...
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115 views • 0 helpful votes
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