Yamaha yz250 2015 User Manual

1-8
SPECIAL TOOLS
SPECIAL TOOLS
The proper special tools are necessary for complete and accurate tune-up and assembly. Using the correct special tool will
help prevent damage caused by the use of improper tools or improvised techniques. The shape and part number used for
the special tool differ by country, so two types are provided. Refer to the list provided to avoid errors when placing an order.
• For U.S.A. and Canada, use part number starting with "YM-", "YU-" or "ACC-".
• For others, use part number starting with "90890-".
Tool name/Part number How to use Illustration
Crankcase separating tool
YU-01135-B, 90890-01135
These tool is used to remove the
crankshaft from either case.
Flywheel puller
YM-01189, 90890-01189
This tool is used to remove the fly-
wheel magneto.
Rotor holding tool
YU-01235, 90890-01235
This tool is used when loosening or
tightening the flywheel magneto se-
curing nut.
Dial gauge and stand
YU-03097-B, 90890-01252
Stand
YU-01256
These tools are used to check each
part for runout or bent.
Crankshaft installing tool
Crankshaft installing pot
YU-90058, 90890-01274
Crankshaft installing bolt
YU-90060, 90890-01275
Adapter
YU-90063, 90890-01278
These tools are used to install the
crankshaft.
Piston pin puller set
YU-01304, 90890-01304
This tool is used to remove the pis-
ton pin.

Yamaha yz250 2015 Specifications

General

Displacement	249cc
Bore x Stroke	66.4mm x 72.0mm
Compression Ratio	8.9~10.6:1
Ignition	CDI
Transmission	5-speed; multiplate wet clutch
Final Drive	Chain
Front Tire	80/100-21
Rear Tire	110/90-19
Wheelbase	58.3 in
Seat Height	39.1 in
Ground Clearance	14.2 in
Fuel Capacity	2.1 gal
Wet Weight	227 lbs
Engine Type	2-stroke
Fuel System	Keihin PWK38S
Front Suspension	KYB Speed-Sensitive System inverted fork; fully adjustable
Rear Suspension	12.4-in travel
Front Brake	Single disc, 250mm
Rear Brake	Hydraulic single disc brake, 245mm
Width	32.5 inches