1988-1992 Suzuki LT230E, LT230EJ, LT230EK, LT230EL, LT230EM, and LT230EN QuadRunner 230 Service Manual (P/N 99500-42075-01E)

• Covers 1988–1992 Suzuki QuadRunner models: LT230E, LT230EJ, LT230EK, LT230EL, LT230EM, and LT230EN.
• Official OEM publication (99500-42075-01E), copyright 1990.
• 281 pages of system diagrams, engine cross-sections, and complete tightening torque tables.
• The exact technical reference dealership mechanics relied on during the LT230E-series production run.

Factory Manual Overview

This OEM publication serves as the primary technical reference for the LT230E QuadRunner. It breaks down every major system on the ATV. You get direct access to engine diagnostics, fuel tuning parameters, electrical schematics, and complete chassis teardown outlines. Rebuilding the four-stroke engine? Servicing the manual transmission? Or maybe you just need to dial in the independent double-wishbone suspension. This guide provides the factory-authorized information necessary for professional shop-level work. Please remember that improper maintenance can severely compromise vehicle performance and rider safety. Always verify your tooling and mechanical experience before tackling major drivetrain or suspension work, and consult a certified shop if you are unsure about critical assembly steps.

Specifications & Hard Data

Expect precise engineering tolerances rather than guesswork. The publication outlines strict factory specifications straight from Suzuki. This includes compression pressure limits (1200–1600 kPa / 171–228 psi), intake valve clearances (0.03–0.08 mm), and cylinder head bolt torques (21–25 N·m / 15.0–18.0 lb-ft). You will also find critical fluid capacities, like the 9.5-liter fuel tank limit, to ensure accurate servicing. Having the actual factory documentation structure on your bench significantly speeds up troubleshooting and assembly processes.