Poor performance at high or top speed. Before beginning any engine work, re-read the service hints in Chapter One. Table 1 and Table 2 are located at the end of this chapter. Clearly, the Suzuki engineers underestimated how hard their customers could ride their product. Refer to Table 1 for engine specifications and Table 2 for torque specifications. The seats changed drastically in '87.
All new rear plastic is the '91-92 style with the riveted bar under the seat. They also came with rear heel guards that required a few minor changes to the frame, footpegs, and swingarm pivot bolt. This article does not any. However, the '87+ swingarm will mount to the 85-86 frame with some other minor equipment swap i. Poor performance at low speed.
The rear fenders will swap between any year, but the '91 and '92 model years were different under the seat in order to access the air filter which was relocated due to the redesign of the rear suspension. In '86, they changed these letters to white. Unsourced material may be challenged and. The major changes were in the frame, engine, swingarm, and a-arms. There is no oil supply in the crankcase, as it would be drawn into the cylinder and foul the spark plug. Also the '87+ used a 6 speed transmission instead of the 5 speed used on the 85-86 models. The air intake from the carburetor to the cylinder is in a 5 bolt pattern and larger than the other years providing more air flow.
Carburetor specifications are covered in Table 1 at the end of this chapter. It combined a lightweight frame and good handling, with a liquid cooled 250cc two-stroke. The engine color was changed from silver used on the 85-86 models to blue for the '87+ models. For '87+, a head motor mount was added and connects the engine to the backbone of the frame under tank. The clutch and transmission have their own separate oil supply. Alterations in jet size, throttle slide cutaway, and changes in jet needle position, etc.
This manual is highly detailed with hundreds of photos and illustrations to help guide you through every repair procedure. The front fenders are the same and will swap between any year. Engine does not start or engine has a hard time starting. The '87 and '88 rear axles continued to have 24 splines axles that were the same as the 85-86 models. There are also some cosmetic differences between the seats of various years. The 85-86 exhaust goes out the side of the cylinder and the '87+ goes straight out the front in between the split downbar, hence the head pipe design changed for '87+.
There is sufficient oil in the mixture to lubricate the crankshaft bearings, the piston and the cylinder. The '87+ rear axle carrier includes forward-reverse slide chain tensioning rather than the 85-86's rotary tensioning method. The 85-86 is also a non powervalved motor as the '87+ have powervalves. The '87+ carrier housing slides forward and reverse and then is held in place by four vertical bolts and two rear horizontal bolts whereas the 85-86 carrier was held with a clamp or pinch design. This will be helpful when troubleshooting or repairing the engine. The most visible change is in the frame right in front of the cylinder the 85-86 frame has a single down bar, but the '87+ has a single wishbone down-tube. During these early years though, they were treated as equals, with the Honda being preferred by most because of its apparent handling characteristics.
Although the clutch and transmission are located within the engine crankcase, they are covered in Chapter Six to simplify this material. A small sample of some of the topics covered in this manual is: air cleaner, air cleaner housing, air cleaner drain hose, battery, brake fluid, brake fluid replacement, brake pad, brake pads, carburetor assembly, carburetor disassembly, carburetor choke, cylinder compression, cylinder head, cylinder head and pistons, differential, engine idle speed, engine removal, engine oil, engine oil change, engine oil filter, exhaust system, exhaust systems, final drive, flywheel, starter, clutch, frame cover, front brake shoes pads , front crankcase cover, front drive shaft, fenders, front fenders, mud guards, front mud guard, shock absorber, front wheel, front wheel cylinder, fuel hose, fuel tank, fuel tank cover, gear position switch, gearshift linkage, handlebar switch, headlight, headlight grill, ignition coil, ignition switch, ignition system, inner fender, maintenance chart, maintenance schedule, oil cooler, oil pump, outer fender, rear axle, rear brake pedal, rear fender, recoil starter, reverse shift switch, valve, valves, piston, pistons, electric shift program, electric starter, valve clearance, valve guides, valve seat, seats, wheel hub and knuckle, wheels, QuadSport rims and tires, wiring diagram, wiring diagrams quad, and much more Also covered is a detailed systematic approach in troubleshooting to determine common problems and procedures on how to fix the problem. To purchase this repair manual just click on the instant download button at the upper left hand corner of this page. You will do a better job with this information fresh in your mind. But the overall advantage in weight compared to most other quads is the simplicity of design. This necessitated the differences to the rear plastic under the seat as mentioned above.
. Note that the original rear plastic for '85 - '90 is no longer available from Suzuki. Hence, the 87's are desired by tuners and racers for the larger base air flow. The '85 and '86 Quadracers are known as the lightest production full size race quads ever built, tipping the scales at only 293 lbs dry making them similar to the 250cc two stroke race three wheelers of that era. The '91 and '92 rear plastic actually has a curved metal bar riveted under the seat to help support the plastic due to the larger void in the plastic moulding necessary to access the air filter.
This expert text service repair manual gives complete step by step information on maintenance, tune-up, repair and overhaul. . . . . . .