After only a couple of outings to RJs Motorsports track in Midhurst near Barrie on the old RM125, I was hooked again. On the second outing I had tuned the suspension and was doing much better but it felt very sensitive to throttle input, like the power band was very narrow. After riding my kid’s KX100 that had a much smoother power delivery, I started playing with the power-valve setting, however, since the kids now had a bike to ride and I was keen on riding more often, I decided it would be a good idea to get something a bit newer. Started looking on Kijiji for a newer 125 but people seemed to want a lot of money for them. I really didn’t want a 4 stroke but most of the bikes at the track were YZ250Fs and I found 3 for sale under $2500 on Kijiji. My research only turned up glowing reviews of the YZ250F and some people were suggesting they were better than 2 stroke 125s in virtually every way.
Decided to go for it and picked up this 2001, a couple of minor issues but pulls nice and strong and seems to be in good condition.
To Do List
Can be hard to hot start – check air screw setting on carb and compare to stock
Tiny bit of play in swing arm – replace linkage bearings
Left side radiator guard is missing
Repair exhaust stud in cylinder head – investigate thread inserts to repair stud in cylinder head and bolt in upper fork yoke, winter?
New (used) rear brake lever – made new clevis to replace bolt
Replaced bolt in upper fork yoke with longer bolt with nut on the end because threads are trashed (not by me!)
Install new front wheel bearings
Install new lower shock bearing
Kick start lever (aluminum) worn – welded blob on steel hub
New muffler bracket – made one from exhaust hanger band and tool drawer liner
Repack muffler with FMF standard packing
Repair huge dent in muffler
New shouldered bolt for front brake lever
New rear brake fluid reservoir
Check valve clearances
New handlebars (from RMX250) – a touch wide so cut 1/2″ off each end
Add spacer to spring in kick start lock so it doesn’t vibrate out while riding
Solder loose wires on pick-up coil
Remove numbers from side panels