Recent content by freddy

CDI failed. No spark now. 6+2 connectors are actually only 5 wires, soit needs an AC cdi which I will have to custom connect. the variations between std wiring conventions and the colours used in the loom just make life harder than it needs to be. There isn't any logic to it. I have...

new temp gauge sender tested 25 Ohms at 100 deg C, thermostat changes around 65 Ohms. Neither marked. Repco premixed coolant seems ok. Bought 3x 1L Bike cutting out when on freeway, @>70kph in abt 6min. Could be elect, vacuum or fuel. Because it seems precise and consistent, suspect...

thank you for your counsel. I have resolved the matter. the yp250 motor parts and standards will exactly suit my engine because they are the same, if I have read the advertising on ebay correctly. I will remove the t'stat and sender and compare them to the operating standards of the yp250...

A thermostat has a maximum port area to limit the maximum flow rate. Remove it and the area usually increases considerably. There isa maximum rate of heat transfer from the fluid to the air via the radiator Most radiators are minimum practical size. If heat added by motor is greater than...

The response is not linear, and time is necessary to cool the liquid. If liquid too hot at radiator exit then motor temp rises. Thermodynamics do not lie-I know it sounds odd, but it's been well known for many years, moreso on some designs than others. Friend==Google-where you will find...

Logically, it has coolant and a presurized system. So it prob runs at 110degC or so warmed up. If so, my temp gauge sensor is u/s cos it's out of tolerance. Thermostat can possibly be increased to higher opening temp one, as can thermofan. . All logical, sensible theory, BUT does it...

I want to know what the defaults are with the 3 components listed. Then I'll be able to tell if mine are working properly. If they are, then I can look at reasons why it's overheating. ATM I have no real proof the motor is overheating.. I do not know the normal running temp of the engine...

We are both correct. the purpose is to speed up the warmup and regulate the temperature, but if removed the motor risks overheating, as and why stated.

if thermostat removed motor will overheat. thermostats restrict the max coolant flow to keep coolant in the radiator and let it cool down. I dare not risk it. NEVER run without a thermostat, partic if its hot weather.

My dealer says this info not available from Lifan. That's just awfully poor. I know, I bought it. I knew what it was and I took the risk. Now I pay the price of buying Chinese crap. No support, no information and no-one to ask. I've seen thermostats from 65deg to 98deg, and temp...

Anyone know the resistance of the temperature sender at a given temperature for a 1P69MM motor? Mine seems to be too few Ohms, tho' I thought that an unusual error.

News Flash thermostat valve opens at 60 deg C. I'll have to test mine. I'll guess and say it should be fully open within 10 deg more.

Agreed, it has a bleed tap between the L & R of the upper cylinder head. I've just looked at the YP250 thermofan setting and thermisor readings, but havent found the Chinese equivalents yet.

YP250 thermostat o[ens 80.5 - 83.5 DegC. Can't find specs on Chinese part. My ign unit is 6 wire ,I'm told abt 5cm x 2cm. yp250 coolant is recommended as: Ethylene Glycol/de-ionised water 50/50, without silicates suitable for Aluminium radiators. -I found the drain bolt for the rear...

Whenever this liquid cooled single gets near max temp on gauge it cuts out. I suspect TCI/CDI (it has both) transistor has thermal protection and inadequate heatsink. Can I get at it to fix that? The bike doesn't like days hotter than 25degC. We get to 40deg C here. What coolant do I...