What is the best two-stroke oil to use?
What is the best transmission oil?
How should I jet for pipes & filter changes?
How can I get rid of "surging"?
Why don't my turn signals flash?
What brand tires should I use?
What is the best two-stroke oil to use?
There is no good single answer as everyone has their own
opinion... kind of like "what's your favorite color?".
Most any modern two stroke oil is better than anything that was offered in 1970.
There are a few things to note:
Synthetics or semi-synthetics smoke less than dino type oils and, generally,
have lower ash content.
Castor based oils are known to gum up rings.
Oils are rated for "air cooled" and "water cooled". "Air cooled" oil is
designed for higher operating temperatures than "Water cooled".
Any oil rated TC-W3 or JASO FC (or better) is good oil.
Make sure oil is designed for injector use unless you premix.
What is the best transmission oil?
Even though the owner manual specifies 30W motor oil, it is not
the best or even a good thing to use in your transmission. Modern motor
oils are filled with additives that your clutch may not like. Dino based,
80W gear oil is a better alternative. A lot of folks think 80W gear oil
would be thick like syrup... not so. 80W gear oil is similar to 30W motor
oil in viscosity. Any dino based 80W or 85W gear oil with a GL-5 rating is
suitable.
Viscosity Table
Many choose to use ATF in their transmissions. ATF lacks the shear strength and pressure qualities of gear oils.
Carb kits have been known to cause a lot of grief because of inexact dimensions and tolerances of various kit parts. Needles and jets contained in kits may not be the same as those originally supplied. Genuine Mikuni parts are recommended. The fuel valve and gaskets in kits can be used without reservation and can frequently be purchased in a kit with less expense that buying the parts individually. If you do choose to use kit jets, etc., be sure to save the original parts to cure any problems created from kit parts.
How should I jet for pipes & filter changes?
Jetting is an individual thing. There are a lot of variables that are unique to an individual bike at a specific location. There is no pat answer. A lot depends on the specific type of chambers and filters used. It is imperative that the carbs are thoroughly cleaned. If all of the information at http://kawtriple.com/mraxl/carbtuning.htm is read and understood, proper jetting can be achieved. It is largely a time consuming trial and error process. Pilot jet should not require change. It should be noted that "rebuild kits" may contain jets and needles that are NOT suitable for use in any application.
How can I get rid of "surging"?
"Surging" is caused from a lean mixture condition. It is a characteristic of H2's at small throttle position. Surging can be minimized by careful sync of carbs and setting of air screws. After air screws are set for maximum rpm according to procedure, you can try setting them richer by as much as 1/4 turn. It may also be desirable to fit a richer slide. Removing 0.020" from the flat at the bottom of the slide is near equivalent to fitting next size richer slide. A loose chain and/or loose rubber drive hub dampers will emphasize surging.
Why don't my turn signals flash?
The bulbs in the signals MUST be at least 23 watt bulbs for the
flasher to properly function. In addition, a fully charged battery is
desirable.
If aftermarket or LED signals are used it will require that the flasher is
replaced with an electronic type flasher where bulb current is not required for
the flasher to work.
What brand tires should I use?
Opinions vary but, in general, the cheap priced tires give poor performance, especially in wet weather conditions. Bridgestone BT45 & S11 are good tires for the money. Quality tires can improve handling and may save your a$$.
Modern metric tire sizes are now used for most tires today. For S series, use 90 or 100 widths and 110 for the rear. For H series, use 100 for front and 120 for rear. Any larger tire on the rear may rub chainguard and detract from handling. Be aware that manufactures do have recommended tire sizes for specific rim widths. Chart
New swingarm bushings, roller bearings for headstock, quality tires, and tight spokes are good things for all Triples. The H series can show improvement by installing longer (1-1 1/2") rear shocks and 18" front wheel.
