Video of the starter sprag clutch gear below
Friday 1 April 2022
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.
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.
Video removed
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
Athena Seals New oil seals need to be fitted on every rebuild
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.
Wednesday 3 March 2021
Monday 1 March 2021
Testing motorcycle CDI units and systems
Testing motorcycle CDI units
Learn more about these from this excellent video
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
Get set up turn meter to ohms reading on dial and clean the electrode as below
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
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
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.
See video of this process below
Wednesday 16 December 2020
Yamaha YBR 125 Youtube playlist repair video series
Just added all the video on YBR 125 to a Youtube playlist
Yamaha YBR 125 repair and maintenance
Yamaha YBR125 YBR 125 strip down and restoration series of videos , engine strip down and rebuild Top end Cylinder barrel piston crankcases and crankshaft gearbox etc , maintenance and servicing , fault finding repair and fixing help and advice on these excellent Japanese bikes
Part of my Engine strip and rebuild series for the Yamaha YBR 125 if you Have a Yamaha XT 125 R then this engine is the same as yours.
Click link below to see the videos in the Yamaha YBR 125 playlist
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