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TZ250 Questionnaire

Thank you for completing this questionnaire. Your efforts are very much appreciated.

It is designed as a simple, concise and thorough method to collect relevant information on TZ250s to assist in the updating of Volume 1 of Yamaha Two Stroke Production Roadracing Motorcycles as well as (more importantly) the writing of the next book in the series: Volume 2: 1983 to 2009.

Thank you once again,
Greg Bennett
Webmaster of www.tz350.com and author of Yamaha Two Stroke Production Roadracing Motorcycles. Vol.1: 1959 to 1982

Name First Last
In which country are you located? *

This helps to determine the distribution of TZs. ie. How many went to each country.
Select the model TZ250 you have experience with. *

Please select which bike you are reporting on.
Use separate questionnaires for additional models.
What is/was the chassis number of your TZ250?

Please provide the chassis number of your bike. This helps to determine how many were produced as well as number limits between models.
What is/was the engine number of your TZ250?

This also helps to determine the number produced and cut-offs between models.
If you bought it new, what did the bike cost you?

This is interesting information that readers like to know.
ENGINE

Please rate the following aspects of the bike's engine:
Starting: How would you rate the ease of starting the bike? *
Very difficult Difficult Neither easy nor difficult Easy Very easy

Please rate the ease of starting the bike in general
Tuning: How would you rate the ease of tuning the bike? *
Very difficult Difficult Neither easy nor difficult Easy Very easy

Please rate the ease of getting the bike running well
Comments on the starting and tuning of your bike.

eg. Is there a reason why your bike is/was hard to start?
Why was it easy to tune?
Minor maintenance: How would you rate the ease of minor top end maintenance on the bike? *
Very difficult Difficult Ok Easy Very easy

How hard was it to do regular servicing and minor work on the motor? Consider removal of components and any disconnecting of cables, wires, tubes, etc.
Major maintenance: How would you rate the ease of major bottom end maintenance on the bike? *
Very difficult Difficult Ok Easy Very easy

How hard was it to split the cases and do major work in the heart of the motor?
Longevity: How would you rate the service life of the motor? *
Parts wore out very quickly Parts wore out fairly quickly Average service life Parts lasted fairly well Parts lasted for a lot longer than I expected

How long did the components of the motor last?
Reliability: How would you rate the reliabilty of the motor? *
Parts broke/failed very easily Parts broke/failed fairly easily Ok Parts were fairly strong Parts were very durable

How often did parts fail?
Comments: Do you wish to add any comments about the maintenance, reliability, or service life of the motor?

You may wish to clarify your opinion of the motor from a mechanic's perspective.
Is there a reason why for example, it was very hard to start? (Perhaps it had radical porting work done?) etc.
Bottom end: How would you rate the bottom end performance of the bike? *
Very poor Poor Ok Good Very good

Please rate the bike's bottom end performance
Mid-range: How would you rate the mid-range performance of the bike? *
Very poor Poor Ok Good Very good

How well did the bike perform in the mid-range?
Top end: How would you rate the top end performance of the bike? *
Very poor Poor Ok Good Very good

How well did the bike perform in the top end?
Comments: Do you wish to add any comments about the performance of the motor from a rider's perspective?

You may wish to clarify your opinion of the motor from a rider's perspective.
eg Why did it have a great bottom end power delivery? (Perhaps different exhausts?) etc.
Comments: Any other comments about specific areas of the motor?

Perhaps comments on the clutch, gearbox, ignition, carburetors?
CHASSIS

Please rate the following aspects of the bike's chassis and running gear:
Handling: How would you rate the stability of the bike at speed? *
Very poor Poor Ok Good Very good

How well did the bike's chassis perform at high speed?
Handling: How well did the bike corner? *
Very poorly Poorly Ok Well Very well

Did it tip in with ease? Stay on line? Wobble? Lose the front end often? etc.
Brakes: How well did the bike's brakes perform? *
Very poorly Poorly Ok Well Very well

Did they have a savage initial bite? Spongy feel? Useless rear brake? etc.
Comments on the handling and brakes of your bike.
Forks and steering: How well did the bike's front end perform? *
Very poorly Poorly Ok Well Very well

Did it induce chatter? Lack enough damping? Dive terribly? Feel like it sat too high all the time? etc.
Rear suspension: How well did the bike's rear end perform? *
Very poorly Poorly Ok Well Very well

Did it induce wandering off line? Lack enough damping? Squat terribly? Feel like it sat too high/low all the time? etc.
Comments on the suspension of your bike.
Chassis: How well did the bike's chassis perform? *
Very poorly Poorly Ok Well Very well

Could you feel it flexing? Did engine mounts crack? etc.
Bodywork: How well did the bike's fairing/seat etc. perform? *
Very poorly Poorly Ok Well Very well

Did it compliment slip-streaming particularly well? Did it vibrate on the bike terribly? Was the screen easy to tuck in behind? Did the fairing crack and fall apart? etc.
Gauges and controls: How well did the bike's gauges and controls etc. perform? *
Very poorly Poorly Ok Well Very well

Were the guages easy to read? Did they vibrate terribly? Were the controls positioned well? Was there enough adjustability? Did the controls wear out? Break too easily? etc.
Wheels: How well did the bike's wheels perform? *
Very poorly Poorly Ok Well Very well

Were they too wide for the bike? Too thin? Did they warp after a crash? Split? Easy to balance? etc.
Do you have any comments on the chassis and running gear from a rider's point of view?

From a rider's perspective.
Do you have any comments on the chassis and running gear from a mechanic's point of view?

From a mechanic's perspective. Was it easy to work on? Was it easy to adjust?
Is there anything else you would like to add about your experiences with this particular TZ250?

Anything you may have forgotten to mention?
THANK YOU!

The information you have provided will be analysed along with all other data received and will be used to make the book as accurate as possible.

Please use a separate Questionnaire for any other TZ250s you have had experience with.

cheers,
Greg Bennett
Can you help?

Please note: In order to attempt to make the book as complete as is possible we desperately need copies of documents such as:

Port maps
Exhaust dimension diagrams
Parts lists
Owners manuals
Factory Service Bulletins
Spare parts packing lists
Delivery dockets
Brochures

If you can help out in this regard in any way please email the author at: tz350_information@tz350.com with details. (Some items we already have, but vast majority are missing.)
Any assistance will be greatly appreciated.
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