For information about a specific make or model of a motorcycle, the owner must have the frame (chassis) and engine numbers. Unfortunately, different manufacturers use different numbering systems and often place the numbers in odd places.
Later motorcycles (post-70s) typically have a stick-on decal or plate on the headstock. Besides detailing the bike's engine and frame number, the decal will show the makers, the model and year of manufacture. Update google drive download. However, the model information can be confusing as machines offered for sale after September (in the United States) will technically be the following year's model.
For example, a motorcycle with a year model stated as 10/1982 on the VIN (Vehicle Identification Number) decal will actually be a 1983 model.
Yamaha Model Designation. Imbedded in the model number is the horsepower and year of the engine. For example: If your model number is 115TRR your engine is a 1993 115hp engine. The first numbers are the engine hp. The last letter corresponds to the year listed in the chart below. 1984(N) 1985(K) 1986(J) 1987(H) 1988(G) 1989(F). I have seen the engine serial number 'ranges' (the numbers the serial number begins with into groups) in the front of the factory service manual, I believe. It's like the 'first 4 digits run from 19XX-19XX' sort of thing. However, this technical article illustrates the difference between the serial number and model as well as showing the location where you can find these. We also have several other related Yamaha Outboard Technical Articles that address the topic of proper Yamaha Outboard Motor identification.
Matching Numbers![]() ![]()
Early motorcycles generally had the same number for the engine and frame (often referred to as matching). However, occasionally an engine case (containing the original number) may have been replaced due to damage and will not, therefore, have a number stamped on it. Alternatively, the owner may have stamped the new case to match the frame number; a practice that may be frowned upon, but if photographed and logged properly, will not greatly affect the value. (This is a typical example of when it is imperative to save the old parts.)
Locating Numbers
Yamaha models can be identified by locating and decoding the crankcase engine number. Yamaha uses a standardized numbering system, which is broken into four sections: model code, basic part number, design code and the finish code. Because the crankcase engine number is actually the part number, improper identification. I bought my first used dirt bike last week, I was told its a 2007 Yamaha yz 85. The guy gave me a bill of sale so after I bought the bike I ran the vin number on the frame and everything matched up and tonight I was changing my oil and noticed the serial number on the engine was different and see. Yamaha Outboard Motor MODEL, PRE-FIX and SERIAL NUMBER’S are stamped on a metal plate which is mounted on the transom clamp bracket located at the rear of the boat.
Locating a frame number on an early machine, especially one that is dirty and in need of restoration (barn fresh for example), can be challenging. However, typically, the number will be found in one of the following locations:
Engine numbers are generally stamped into aluminum cases. The location varies between manufacturers but will be located on the crankcases, just below the cylinder.
Help Through Clubs
Identifying a classic motorcycle from its frame and/or engine number is important for parts ordering or valuation purposes. Willing and able to help in this process are the many make specific clubs. In particular, the UK's Vintage Motorcycle Club Ltd. will undertake a search of any vintage motorcycle for a small fee (no charge if they cannot find the appropriate information).
Yamaha Engine Serial Numbers By Year
Assuming the manufacturer is still in business, their websites are also a good source of information if the researcher is willing/able to spend time sifting through the various pages.
Finally, a word of caution: a classic motorcycle may be listed in a sale as a particular year and model but the prospective purchaser must research the engine and frame numbers to ensure they match the claimed model a model year error, for instance, can make a big difference to the value of a motorcycle.
Yamaha Engine Serial Number LookupAnswerWiki User02/12/2014Yamaha Outboards Serial Numbers
A Persoal WaterCraft (PWC) HullIdentification Number (HIN)provides information on the manufacturer, the serial number of thewatercraft, the month of manufacture, the certification date andthe year of manufacture. Unlike a VIN for an automobile, it doesnot provide detail such as the model, engine type, drive type,etc.
Yamaha Engine Serial Numbers
The decode is as follows.
Characters 1-3 = ManufacturerIdentification Code (MIC) (i.e.HON for Honda, YAM for Yamaha)
Characters 4-8 = Manufacturer Serial Number.This is the unique number assigned to each vessel by themanufacturer at time of hull production
Character 9 = Month of Manufacture. An alphacharacter is used to represent each month (A for January, B forFebruary, C for March, D for April, E for May, F for June, G forJuly, H for August, I for September, J for October, K for November,L for December)
Character 10 = USCG certification date
Character 11-12 = Year of Manufacture
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