![]() ![]() The class for two-stroke Singles with magneto, like the Yamaha DTI, includes the RT1 and 360 with some minor variations, as well as earlier Yamaha, Sachs, Zundapp, Bultaco, Montesa and Ossa engines. The XL125 and XL175 Hondas have virtually identical parts, but because the smaller Honda four-stroke Singles have different wiring looms, they will not run without batteries. Smaller Yamahas have similar parts in different locations. Magneto and points ignition like that on the Honda XL250 also appears on the X元50 and the Yamaha XT500 and TT500 Singles. The multi-cylinder two-stroke class, as illustrated by the Suzuki 380, also includes the larger Suzuki Triples and 500 Twins. Twins, like the Honda 360, Yamaha 360, Kawasaki KZ400 and KZ750, use half the system of the Fours, that is, one set of points. A 500 bath at the local car wash can make the whole job easier.īecause there is no way to fully describe every motorcycle ignition, we’ve chosen a popular example of each common type.įor easy reference, the material on the Honda 750 Four also applies in general to the smaller Honda Fours, the Kawasaki Z1 and the Honda GL1000. Dirt, grease, even lint from a shop rag can ruin an otherwise perfect tuneup. The smallest particle of non-conductive material caught between the ignition points, for instance, guarantees that the ignition won’t fire and the bike won’t run. The next thing before actually tackling the work is to make sure the bike is clean. ![]() And-which can happen-if the engine ran better before you did the work than after, you can return the settings to what they were before you made any changes. ![]() If the engine has been running poorly and your inspection shows point gap and timing to be far from specifications, you probably know what the problem is before beginning the tuneup. A prior check gives one a basis for comparison. One should have all necessary specifications, tools and parts prior to starting.ĭetermine existing settings before making changes. The most important precaution is knowing exactly what procedures you are to follow. More than one method may be given to attain a desired result, so costs incurred can vary with individual preference.Ī comprehensive owner’s or workshop manual should be on hand for reference purposes. In that case, the fiver might swell to a fifty.Īs this article progresses, specific tools will be referred to and approximate prices mentioned. For some models, a dial indicator, volt-ohm meter or power timing light may be necessary. If the original toolkit is still on hand, the frugal will invest less than five dollars. Most ignition adjustments can be made with a few common tools: a spark plug wrench, Phillips screwdriver, medium adjustable wrench, set of feeler gauges, and homemade test light. As many tuning procedures are common to each of the different types of systems, CDI owners should also familiarize themselves with the methods outlined here. Yamaha 250 DTI Single, two-stroke, (magneto/points)ĭue to space limitations, CD ignition systems will be elaborated upon in the November issue of CW. Honda 250 XL Single, four-stroke, (magneto/points)Ĥ. Suzuki 380 Triple, two-stroke, (battery/ points)ģ. Honda 750 Four, four-stroke, (battery/ points)Ģ. Because there are different systems in general use, we’ll look at four different engines. This month we apply the theory, with detailed procedures for inspection and adjustment of ignition systems. Last month we looked at theory: how the various types of ignition systems work. You’ll save money, the work will be done right and perhaps the most rewarding, you’ll know the work was done right. Spend a few dollars for basic tools, plan the work before you do it, and follow instructions. PROPER MOTORCYCLE MAINTENANCE is less complicated than it looks. TROUBLESHOOTING IGNITIONS: GETTING TO THE POINTS ON TIME ![]()
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