Sunday, 2 January 2022

Testing your motorbike for antifreeze

 Make sure you test your vehicle for antifreeze as if your engine freezes it will split the barrel and head and cause a lot of damage.


Buy from Amazon UK here 

Use this tester, remove cap to radiator water and fill it by pressing bulb at top to suck water in. the more balls that float the better protection you have. In the UK you need minimum of 2 balls floating.

See video of this below. 

Wednesday, 3 November 2021

Yamaha YBR 125 engine rebuild parts

These are the parts i use to rebuild my Yamaha YBR 125 engines with


Firstly you need good gasket sets i always use thes NE brand ones never failed me yet





I use either SKF or Koyo bearings 




                                Buy these on Ebay UK here 



Athena Seals New oil seals need to be fitted on every rebuild                                                                           
Cagiva Mito Engine recommended rebuild parts





Ive had very good success with these piston from firefox but if you can find genuine on an auction then but them
 first.








For barrels i always try to rebore and oversize piston.




Monday, 1 March 2021

Testing motorcycle CDI units and systems

Testing motorcycle CDI units 
















Learn more about these from this excellent video 





Technicians Guide To Yamaha Motorcycle Electrical Systems





Technicians Guide To Yamaha Motorcycle Electrical Systems



Basic electrical and circuit information ( excellent watch ) well worth watching even if you are above the basics level.


More advanced electrical circuit operation testing and fault finding 



Sunday, 24 January 2021

Yamaha YBR 125 How to test spark plug with multimeter to see if is it is good or bad

 


Its a very easy but useful test to make sure your spark plug is ok , you may need to clean the electrode to ensure you get a good reading but all you then have to do is set meter to read ohms and measure from the spark plug cap end to the electrode tip , and then from end to body to make sure no leakage to earth.


Buy YBR 125 NGK spark plugs on Ebay UK here


How to test spark plug with multimeter to see if is it is good or bad

Get set up turn meter to ohms reading on dial and clean the electrode as below 

How to test spark plug with multimeter to see if is it is good or bad

Test between end of spark plug where HT lead cap fits and the tip of electrode the reading is very low only 1.2 ohms 

How to test spark plug with multimeter to see if is it is good or bad

on a dirty part of electrode the reading goes wild and eventually read 188.9 ohms so very bad and to avoid this clean electrode tip 



How to test spark plug with multimeter to see if is it is good or bad


Next test from spark plug cap end to the body to make sure no earth leakage your meter should read OL which is a good reading as it signals no leakage to earth via the body.

How to test spark plug with multimeter to see if is it is good or bad

See video of this process below