Honda CRM250R MKII

Honda CRM250R MKII
Manufacturer	Honda
Production	1991-93
Class	Motorcross
Engine	Two stroke, single cylinder
Compression ratio	6.2:1
Ignition	CDI
Transmission	6 Speed
Suspension	Front: Telescopic forks Rear: Swinging arm
Brakes	Front: Single disc Rear: Single disc
Front Tire	3.00 -21
Rear Tire	4.60 -18
Seat Height	885 mm
Weight	115 kg (dry),
Recommended Oil	Honda GN4 10W-40
Fuel Capacity	10 Liters / 2.6 US gal
Manuals	Service Manual

Engine

The engine was a Liquid cooled cooled Two stroke, single cylinder. The engine featured a 6.2:1 compression ratio.

Chassis

It came with a 3.00 -21 front tire and a 4.60 -18 rear tire. Stopping was achieved via Single disc in the front and a Single disc in the rear. The front suspension was a Telescopic forks while the rear was equipped with a Swinging arm. The CRM250R MKII was fitted with a 10 Liters / 2.6 US gal fuel tank. The bike weighed just 115 kg.

Photos

Overview

Honda CRM 250R

CRM250 Mk2 & 2.2 1991 - 1993 The MK2 & Mk2.2 are the same bike in practice, and the MK2 was launched in 1991. This model was a huge step up from the MK1 with all new frame and now wears large upside down Showa forks. Oil is now held in the frame which is much larger than the MK1 and stiffer too. This bike feels far more substantial than the MK1 yet feels more nimble to ride. Power has also increased with the redesigned engine and offers more tourqe than before. The bike still had it's little quirks though and with a couple of design flaws including the wheel bearing securing plate (Made from a soft alloy which screw into the hub also made from soft alloy - Cue bad corrosion, and a seized plate. But even still this bike is the most popular CRM250 and holding it's own in the values game even when so old. Beware for balancer shaft wear in the engine, if regular oil changes are not done done this seems to be the first thing to fail resulting is a death rattle from the engine that still runs with no problems. The MK2.2 had few differences including foot pegs that were different and a new set of graphics. Prices vary between £700 for a rough looking H plate but useable bike to £1500 for a very clean tidy example on a K plate with around 8000kms on the clock.

Make Model	Honda CRM 250R MKII
Year	1991-93
Engine Type	Two stroke, single cylinder
Displacement	249 cc / 15.2 cu-in
Bore X Stroke	66.0 × 72.0 mm
Cooling System	Liquid cooled
Compression	6.2:1
Induction	PE31A 32MM Carburetor type
Ignition	CDI
Starting	Kick
Max Power	40 hp @ 8000 rpm
Max Torque	3.7kg-m @ 6500 rpm
Transmission	6 Speed
Final Drive	Chain
Front Suspension	Telescopic forks
Rear Suspension	Swinging arm
Front Brakes	Single disc
Rear Brakes	Single disc
Front Tire	3.00 -21
Rear Tire	4.60 -18
Seat Height	885 mm
Dry Weight	115 kg
Fuel Capacity	10 Liters / 2.6 US gal