Squeeze out excess liquid thoroughly without twisting or wringing the foam. Allow the filter to air dry completely.
A: No. While engines are similar, the frame geometry, wiring colors, and brake systems differ. Use the specific HB manual to avoid short-circuiting your electrical system.
Pour in 0.8 quarts of clean 10W-40 4-stroke oil through the dipstick hole.
| Fastener | Torque (Nm) | |----------|-------------| | Spark plug | 10–12 | | Cylinder head bolts | 18–22 | | Valve locknuts | 8–10 | | Rear axle nut | 55–60 | | Engine mount bolts | 35–40 | hb atv 125 service manual
Import 125cc ATVs often suffer from clogged jets due to stagnant fuel or debris.
Generally Intake: 0.05mm - 0.08mm, Exhaust: 0.08mm - 0.10mm. 3. Spark Plug Maintenance Type: NGK C7HSA or equivalent. Gap: 0.6mm - 0.7mm.
Intake: 0.002 inches (0.05 mm) / Exhaust: 0.003 inches (0.07 mm). 2. Periodic Maintenance Schedule Squeeze out excess liquid thoroughly without twisting or
Change engine oil; check and tighten all chassis nuts and bolts; check chain tension.
| Screw | Typical setting | |-------|----------------| | Idle speed (large screw) | Turn in until engine runs, then adjust for ~1500 RPM | | Air mixture (small screw) | Start at 1.5 turns out from lightly seated |
Locate the spring-loaded brass screw on the side of the carburetor. Turn it clockwise to raise the idle speed if the engine stalls out while sitting still. Turn it counterclockwise to lower the idle. While engines are similar, the frame geometry, wiring
Inspect and clean the air filter; check brake pads; lubricate the drive chain.
Apply a thin coating of high-tack foam air filter oil. Squeeze the filter to distribute the oil evenly; it should be tacky but not dripping. Reinstall the filter and secure the air box cover. 3. Carburetor Tuning & Cleaning
Loosen the rear axle carrier housing bolts. Turn the chain adjuster nuts on the rear of the swingarm evenly on both sides to maintain rear wheel alignment. Tighten the carrier bolts back to specification. Lubricate the chain thoroughly with a dedicated chain wax or aerosol lubricant. Brake Maintenance
Ensure the rear sprocket aligns perfectly with the front drive sprocket to avoid premature chain wear or derailment.
Use the dipstick to verify the oil level is within the marked range while the ATV is level. Air Filter Cleaning The HB ATV 125 uses a foam air filter. Remove: Take off the seat and remove the airbox lid.