Need to know how to set the timing on a 110 4 stroke bike engine

Some description of 2-stroke or 4-stroke, number of cylinders, type of cooling would have been useful.

In mild or hot weather the head of an air cooled bike could conceivably be hand-hot in 45 seconds but mostly it would take considerably longer, especially if the engine is a 4-stroke. Of course just because an engine heats up quickly it doesn't mean it will overheat in use and air-cooled engines should not be operated for long while the bike is stationary, except in cold weather, but be put into normal use as soon as possible after starting.

If the engine is overheating there are various things that could influence or cause it. Ignition timing, valve timing, fuel air mixture, lubrication, detonation, restricted exhaust...

Good luck!

Are you able to measure the bore and stroke? Cubic centimeters displacement would be pi times radius squared times height.? The dealer can take those numbers off the engine and do the job,why not? Match up the old piston if you can find it

you will see two lines at the top and bottom of the sight glass, oil needs to be between these lines with the bike held level, use motorcycle 4 stroke engine oil from a bike shop, car oils can make the clutch slip

Model: Yamaha YZ 426 F Year: 2002 Category: Cross / motocross Rating: 71.6 out of 100 Engine and transmission Displacement: 426.00 ccm (25.99 cubic inches) Engine type: Single cylinder, four-stroke Compression: 12.5:1 Bore x stroke: 95.0 x 60.1 mm (3.7 x 2.4 inches) Valves per cylinder: 5 Fuel control: DOHC Cooling system: Liquid Chassis, suspension, brakes and wheels Front suspensiontravel: 300 mm (11.8 inches) Rear suspension travel: 315 mm (12.4 inches) Front tyre dimensions: 80/100-21 Rear tyre dimensions: 110/90-19 Front brakes: Single disc Front brakes diameter: 250 mm (9.8 inches) Rear brakes: Single disc Rear brakes diameter: 240 mm (9.4 inches) Physical measures and capacities Dry weight: 105.0 kg (231.5 pounds) Seat height: 998 mm (39.3 inches) If adjustable, lowest setting. Overall height: 1,303 mm (51.3 inches) Overall length: 2,171 mm (85.5 inches) Overall width: 827 mm (32.6 inches) Ground clearance: 375 mm (14.8 inches) Wheelbase: 1,490 mm (58.7 inches)

hi, this bike has a four stroke engine and requires petrol only, (not mixed fuel)

Specifications: Engine Type: 1449 cc, 4-Stroke, Air Cooled, V-Twin
Engine Bore and Stroke: 95.3 mm x 101.6 mm
Valves 2 valves/cylinder
Claimed Horsepower: 67 hp (50 kW) @ 5200 rpm
Maximum Torque: 110 Nm (81.1 ft. lbs) @ 3100 rpm
Transmission type: 5 speed
Final Drive: Belt

Tire - Front: 130/90-16
Tire - Rear: 130/90-16
Brakes - Front: dual 292 mm discs with 4-piston calipers
Brakes - Rear: single 292 mm disc with 4-piston calipers

Sizes can vary depending on what has been done to the bike.
Ride safe and loud pipes save lives.

IS THIS A 4 STROKE ENGINE? DID THE BIKE FALL OVER ON ITS SIDE FOR A LONG TIME? A PLUGED UP FILTER IN THE AIR FILTER BOX,OR A POSITIVE CRANKCASE VALVE PLUGGED UP? THE CRANKCASE VENTING,VAPORS NEED TO GO INTO THE AIR INTAKE AND BURNED IN THE COMBUSTION CHAMBER CYLINDER.

32 to 1. That equals 4 ounces of two stroke engine oil to one gallon of gas. DO NOT use motor oil. Only use two stroke engine oil.

This is not hard but will take some patience to fix it. When the piston is at the top it is called top dead center or TDC. The trick is to get the spark at just a hair after TDC.
Here comes the trick. 4 Stroke engines require two trips to TDC to get one spark. 2 stroke engines get a spark every trip to TDC.
First. Figure out if you 2 or 4 strokes.
Second Adjust timing so it fires just a hair after TDC
Let me know if you need more info and model of bike

hello Sir,

It was the phase between 1990-1995, when Yahama lost to Hero Honda, as v know, Yahama was an expert in 2-stroke engine bikes, as v know 2-stroke engine will yield higher power but NO good mileage, n emit more smoke.
so...GOV OF INDIA phased out all production of 2 stoke engines in the country, so yamaha had to stop the production of Yamaha RX n RD series in INDIA.

N constantly rising fuel prize, utilizing this need form d public Hero Honda's CD 100 hit the market, with 4 stroke engine n heavily improved mileage.

hence Hero honda won the race...

Although Yamaha came up with some 4 stroke models, but those didnt click it for them, but now its again yamaha's time !!

with introuduction of Yamaha R15, FZR , really yamaha is back with a bang !!

thank u so much..!!
plz vote me/ rate me ..thank u!!