I just aligned the wheels on a new old motorcycle I just acquired. This is one of those activities that is an arcane procedure.
I dug up an old post I made to the ducati mailing list in the mid 1990's about this.
The "Thread Method"
I've always aligned my wheels the way I saw Rich Oliver do it on his TZ250
years ago. I think this way is standard "racer" practice.
Put bike on service stand. Take about 15 feet of string (elastic thread
works best!). Tape center of string to back of the rear wheel about 4" off
the ground. Bring the ends of the string to the front of the bike. Tie the
ends of the string to some movable objects (I use a pair of jack stands),
at the same height (4"). The idea is to set the strings so they are
parallel and "just" in contact to the front edge rear tire by moving the
jack stands. With the strings taped to the back of the rear tire, and
"just" touching the front edge of the rear tire, they should make two
parallel lines that run forward, passing along either side of the front
tire. Now the alignment of the front and rear wheels can be easily observed
by examining the clearance of the front wheel and the string on either
side. Adjust the chain adjuster appropriately if necessary, and then
recheck.
It's a pain to do the first time, but then it gets easy. Use the thinnest,
elastic thread you can find. Also, try rotating the rear wheel to several
points to make sure you aren't just adjusting for uneven tire manufacture.
And make sure the thread isn't on some bump of "mold seam" rubber or in a
tread at the edge of the tire. This would screw up everything.
Obviously, this method ignores how the chain and sprockets are aligned, and
focuses on how the wheels and tires are aligned. I can imagine that having
the sprockets and wheels aligned simultaneously may not be possible, and
I'd rather have the wheels lined up.
When using this procedure on my '92 750SS, a quarter turn of one of the
chain adjusters is quite significant. When complete, the adjusters appear
to be at even marks at either side of the bike, indicating adequate
manufacturing. However, a quarter turns seams to effect the alignment
significantly, but is just about invisible in relation to the adjuster
marks.
The "ProAligner"
There is a relatively new gizmo available to help riders to align there wheels, its called the ProAligner. What I quickly found, is that I had trouble using the ProAligner on my
oldest vintage bikes. The tires are very narrow (2.50" or 2.75" by 19)
and have the same size front and rear. One might say that you could in
theory just sight down the tires even without the ProAligner, but I have
trouble with that. I ended up doing those old bikes with my old and
reliable thread method.
Today, I aligned the wheels on my newly aquired 1981 GPz 550. It came
to me with the tires visibly way out of alignment. Investigation showed
that the plastic chain guard had warped so it hit the tire, and some
previous owner had "fixed" this problem by tweaking the chain adjusters
until the tire was clear of the guard!
The GPz has a 3.25 x 19 front and a 3.75 x 19 rear. I quickly tried out
the Proaligner and saw how it would work, but this time had a bit of
trouble with my vision sighting down the tires. It occured to me that
the bigger the difference in tire size, the easier the aligner would be
to use. Frankly, I again went back to my old thread method. Having done
it that way for 30 years, I'm just very comfortable with that. After
getting the wheels spot on with the thread, I pulled the ProAligner
back out and tried it again. Lo and behold, the ProAligner also showed
the wheels perfectly aligned.
(A note here, with the wheels aligned, I note that the hash marks on the chain adjusters are not even on both sides. This is typical, especially on older bikes. That's why some of us don't trust the chain adjuster marks.)
My thoughts? The ProAligner is a great gadget, especially for those
with laser vision, no experience with thread, and tires that differ
significantly in size from front to rear. Its certainly easy to see when
the tires are way out of alignment. But if the tires are similar in
size, it is delicate, and requires a really sharp eyeball to tell the small
differences between each side of the tire. The ProAligner web site claims accuracy to "less than 0.1 inch (2.5mm)". That's possible, but, well I'd have trouble getting it that close. It's not just about being able to sight down the ires, you also have to adjust your focus from the front tire to the rear tire, and not move when you do that. I'd say getting to within 5mm or 3/16" would be pretty do-able with good vision.
For me, an engineer and long time rider and thread aligner, I don't
see the ProAligner as much more (or any more) accurate than the thread method. But I don't think
it's any less accurate either! With the thread, you really have to be
very careful to get it to just touch/miss the front edge of the rear
tire and to not "bend" the thread. With the Pro Aligner, you have to
sight down the tire just right, adjust your focus carefully, and really see the hash marks.
I think if the tires (front and rear) are close to the same in size,
or if I want to align the tires very, very close to perfect, the thread
works better for me.
But, I'd say, that if you are double checking
an alignment that was already done (assuming differing front and rear
tire sizes) the ProAligner is quicker and easier. I'd also say, that if
the tires are way out of alignment, the ProAligner would be quicker to
get the wheels somewhat aligned, as there is no hassle with thread.
And if you have sharp vision, and no experience with the thread, the
ProAligner might be the way to go. If you can "see" it, it's pretty
foolproof. The thread system takes some time to learn. Then again, if you have trouble with it, don't hesitate to try the thread method.
Carl
Since it's starting to warm up and you folks will be getting your bikes out of moth balls, I thought I'd take a minute to give you some information and education about antifreeze/coolant products as well as some insight as to what coolants actually are and what their true purpose is.
Now, being from Engine Ice, I am a bit biased and I admit it. However, most all of the products on the market are excellent products, but each has various uses and applications for them. We produce Engine Ice for specific high intensity and high heat applications. It really is not designed as an “everyday” coolant; it is for racing or high temperature applications. However, it can be used as an everyday coolant with no problem
There are two basic types of coolant/antifreeze, Ethylene Glycol (EG) and Propylene Glycol (PG) and then there are surfactant products such as Water Wetter from Red Line for example. All of the products mentioned are good products, just offering different things.
Ethylene Glycol (EG) – This is basically your “Prestone” type of products. Maxima’s Coolinol, Pro Honda Coolant and Spectro Coolant are examples of this type of product. It is basically the same as the coolant/antifreeze product you can buy at the auto parts store, but “silicate-free.” This is important, don’t get the stuff from the auto parts store unless it’s silicate free. Most are pre-diluted for easy use; they are diluted with a more pure distilled water or deionized water (deionized water is explained below). This is better water than what you can buy at the grocery store.
You really shouldn’t call an EG-based product a “coolant,” an “anti-boil” product would be more accurate. EG is made very cheaply and its primary purpose is to eliminate boil-over and to keep your system from freezing up. That’s basically it. It is not designed to actually reduce temperatures. If you are driving a car or a cruiser-type bike that does not have a temperature issue, these are fine products.
Water Wetter - It is an additive product. Water Wetter is what is called a “surfactant.” What this means is that it reduces the surface tension of the water or in other words, it allows the water/fluid to “rub” closer to the metal allowing it to better draw off heat. Water Wetter works and it is good stuff. However, if you add it to an EG antifreeze product your results are minimal. It will reduce temperatures, but by only a small amount. Added to water, you will see a significant difference in temperature reduction. But it will not raise the boil point of the water nor does it offer any antifreeze protection. So your engine may run a bit cooler, but when it gets hot it will “spit out” the coolant before other products do. That is not good, because now you’ll have less coolant in the engine. Using more than the recommended amount (4 capfuls to a quart) is a waste and it will not make any difference, only use their recommended amount.
Water alone is not recommended. You do need to add some type of water additive to it. Water alone is corrosive and it does not keep your seals, gaskets, water pump and water pump impeller shaft lubricated enough. Make sure something is added to water, do not run it all by itself.
I would not recommend Dex-Cool (the orange stuff). All reports and tests that I have heard of have not been good. It can "gel." It also has a tendency to clog up a motorcycle system. The radiator core and the system itself of a motorcycle is smaller when compared to an auto. I would avoid Dex-Cool and choose any other product before I'd recommend anyone using it.
Propylene Glycol (PG) – This is what Engine Ice Hi-Performance Coolant and Evans Coolant is made of. Evans is 100% PG and has an extremely high boil point of well over 350oF. They recommend you make some mechanical changes to your system, such as a zero psi cap or a different radiator in order to use it. Their goal is to eliminate boil-over, not to reduce temperatures. At their recommended 100% PG use, you’d have a boil point in excess of 350oF. At 100% PG, it would not be as effective at dissipating heat from your engine as well as it has a higher viscosity. Water is the ultimate coolant. All coolant products are measured against water for its heat dissipation capabilities. The lack of water in the use of Evans greatly reduces its ability to cool your engine. If you’re running heavy equipment or an 18-wheel truck, Evans is probably a good product.
Engine Ice is a diluted ratio of PG and Deionized water. The process of de-ionizing water eliminates all of the impurities that can do harm to your cooling system. Regardless if you are using tap, bottled, distilled, spring or R/O (reverse osmosis) waters, it can still contain minute particles of iron, magnesium, rust, lime and calcium. Many of these waters also contain chemicals, such as chlorine, fluorides and acids. Want proof? Take two different brands of distilled waters and perform your own taste test. They each taste different don’t they? If water were water, why would they be different? It’s because of the varying amounts of chemicals and minerals in these waters. These minerals and chemicals are what is the cause of scarring, scaling and mineral build-ups in your cooling system. Many also attribute these minerals and chemicals to water pump seal and gasket failures.
Engine Ice was developed and tested in the heat and humidity of Southern Florida. Tests have proven to reduce operating race temperatures by as much as 50oF in some situations. PG is a lubricant and is a surfactant in itself, meaning it has more capability to draw away more heat than EG-based products and even Water Wetter. It is biodegradable and non-toxic. It will not kill your dog, nor will it kill the plant life at your favorite track or trail. It is also legal in AMA, CCS and FUSA road racing.
Engine Ice has won over 275 National Championship Titles over the last two and a half years including the 2001 AMA 125cc West Supercross Championship with Ernesto Fonseca on the Yamaha of Troy YZ250F and in 2002 Chad Reed in the 125cc West Supercross Championship. You can bet that Yamaha Motor Corporation did extensive testing on Engine Ice prior to putting in into their premier bike in its debut year. It is also used an endorsed by the American Suzuki Amateur Motocross Program. Engine Ice sponsored racer, Darren Luck, won nine (9) CCS class championships in 2002 as well as earned the CCS Florida Expert #1 plate by the largest margin ever. Racers using Engine Ice won seven CCS Race of Champions National Championships at Daytona in 2001 and won an additional eight (8) in 2002.
As for flushing the system, we recommend a very simple and cheap radiator flush.
Go to your local grocery store and buy "White Distilled Vinegar" and mix that 50/50 with some distilled water.
Fill the system with the 50/50 mix, run the bike until warm, let cool, drain and then run clear water through to wash out the vinegar. It's the same idea as cleaning your coffee maker. The vinegar is acidic enough to remove any scale or impurities, but not so harsh that it will harm your delicate seals and gaskets.
WE DO NOT RECOMMEND AUTOMOTIVE RADIATOR FLUSHES...they're too harsh.




















